TWI519085B - Transmission circuit for ethernet and surge protection component thereof - Google Patents

Description

Transmission circuit for an Ethernet network and its surge protection component

The present invention relates to a transmission circuit for an Ethernet network and a surge protection element therefor. More specifically, the surge protection device of the present invention is composed of at least two fast-reacting diodes and a one-way transient suppression diode (or a semiconductor discharge tube) to simultaneously perform common mode surge and differential mode Surge provides protection.

Ethernet related products have become a necessity in people's lives. However, the erection environment of the Ethernet device may cause voltage surges due to lightning strikes, static electricity, or power switches. In order to avoid the surge of the Ethernet device, the internal transmission circuit of the conventional Ethernet device includes a surge protection circuit. The traditional surge protection circuit uses discrete components, including gas discharge tube (GDT) and MOV (Metal Oxide Varistor) type sensitive resistors that provide common mode surge protection in parallel with the Bob Smith circuit, as well as differential mode surge protection. A bidirectional transient suppression diode (BTVS) coupled to the Ethernet chip.

However, the conventional surge protection circuit requires many components, and it includes at least four sets of gas discharge tubes, MOV type piezoresistors, and bidirectional transient suppression diodes. In view of this, how to provide a surge protection component that can simultaneously perform common mode surge and differential mode The provision of protection by surges and the reduction of the number of components required for surge protection circuits is a problem that the industry has to address.

In order to solve the foregoing problems, an object of the present invention is to provide a transmission circuit for an Ethernet network and a surge protection component thereof, which can simultaneously protect common mode surges and differential mode surges, and reduce surge protection. The number of components required for the circuit.

To achieve the above objective, the present invention discloses a transmission circuit for an Ethernet network, including a transformer, a first bridge rectifier, a second bridge rectifier, a first component group, and a second component group. . The transformer contains four transformer components. Each of the transformer elements is coupled between an Ethernet connector and an Ethernet chip, and coupled to a first ground through a first capacitor and a first resistor, and through a second capacitor coupled Connected to a second ground. The first bridge rectifier has a first contact, a second contact, a third contact, and a fourth contact, wherein the first contact and the second contact are respectively coupled to a power chip The third contact and the fourth contact are respectively coupled to the two of the four transformer components, and respectively coupled to the first resistor corresponding to each of the two transformer components and the first capacitor Ground terminal. The second bridge rectifier has a first contact, a second contact, a third contact, and a fourth contact, wherein the first contact and the second contact are respectively coupled to the power chip The third contact and the fourth contact are respectively coupled to the other of the four transformer components, and respectively coupled to the first resistor and the first capacitor corresponding to each of the other transformer components First ground. The first component group includes a first fast reacting diode, a unidirectional transient suppressing diode, a second fast reacting diode, a third fast reacting diode, and a fourth fast reacting diode Body, wherein the first fast reacting diode, the one-way transient suppression diode The body is connected in series with the second fast reacting diode, the first fast reacting diode is in series with the second fast reacting diode and is connected in series with the unidirectional transient suppressing diode, the first The fast reacting diode is coupled to the first contact of the first bridge rectifier, and the second fast reacting diode is coupled to the second contact of the first bridge rectifier, the third fast reaction a diode is forwardly connected in series with the fourth fast-reaction diode, and the unidirectional transient suppression diode is in parallel with the third fast-reaction diode and the fourth fast-reaction diode, and the third A contact between the fast reacting diode and the fourth fast reacting diode is coupled to the first ground. The second component group includes a first fast reacting diode, a unidirectional transient suppressing diode, a second fast reacting diode, a third fast reacting diode, and a fourth fast reacting second a pole body, wherein the first fast reacting diode, the one-way transient suppressing diode are connected in series with the second fast reacting diode, the first fast reacting diode and the second fast reacting diode Directly connected in series and in reverse series with the one-way transient suppression diode, the first fast-reaction diode is coupled to the first contact of the second bridge rectifier, the second fast-reaction diode Coupling to the second contact of the second bridge rectifier, the third fast reacting diode is forwardly connected in series with the fourth fast reacting diode, the unidirectional transient suppressing diode and the third The fast reacting diode and the fourth fast reacting diode are connected in parallel to each other, and a contact between the third fast reacting diode and the fourth fast reacting diode is coupled to the first ground.

In addition, the present invention further discloses a transmission circuit for an Ethernet network, comprising a transformer, a first bridge rectifier, a second bridge rectifier, a first component group and a second component group. The transformer contains four transformer components. Each transformer element The device is coupled to an Ethernet connector and an Ethernet chip, and coupled to a first ground through a first capacitor and a first resistor, and coupled to the second through a second capacitor The second ground is connected to the first capacitor and the first capacitor is coupled to the first ground. The first bridge rectifier has a first contact, a second contact, a third contact, and a fourth contact, wherein the first contact and the second contact are respectively coupled to a power chip The third contact and the fourth contact are respectively coupled to the two of the four transformer components, and respectively coupled to the first resistor corresponding to each of the two transformer components and the first capacitor Ground terminal. The second bridge rectifier has a first contact, a second contact, a third contact, and a fourth contact, wherein the first contact and the second contact are respectively coupled to the power chip The third contact and the fourth contact are respectively coupled to the other of the four transformer components, and respectively coupled to the first resistor and the first capacitor corresponding to each of the other transformer components First ground. The first component group includes a first fast reacting diode, a semiconductor discharge tube, a second fast reacting diode, a third fast reacting diode, and a fourth fast reacting diode, wherein the first a fast reacting diode, the semiconductor discharge tube is connected in series with the second fast reacting diode, and the first fast reacting diode is in series with the second fast reacting diode and is opposite to the semiconductor discharge tube In series, the first fast reacting diode is coupled to the first contact of the first bridge rectifier, and the second fast reacting diode is coupled to the second contact of the first bridge rectifier. The third fast-reaction diode is forwardly connected in series with the fourth fast-reaction diode, and the semiconductor discharge tube is forward-connected in parallel with the third fast-reaction diode and the fourth fast-reaction diode. A contact between the fast reacting diode and the fourth fast reacting diode is coupled to the first ground. The second component group includes a first fast reacting diode, a semiconductor discharge a second fast reacting diode, a third fast reacting diode, and a fourth fast reacting diode, wherein the first fast reacting diode, the semiconductor discharge tube and the second fast reaction two a pole body is connected in series, the first fast reacting diode is in series with the second fast reacting diode and is connected in series with the semiconductor discharge tube, and the first fast reacting diode is coupled to the second bridge The first contact of the rectifier, the second fast reacting diode is coupled to the second contact of the second bridge rectifier, the third fast reacting diode and the fourth fast reacting diode are positive In series, the semiconductor discharge tube is connected in parallel with the third fast reacting diode and the fourth fast reacting diode, and the third fast reacting diode is connected to the fourth fast reacting diode A point is coupled to the first ground.

In addition, the present invention further discloses a transmission circuit for an Ethernet network, including a transformer, a first bridge rectifier, a second bridge rectifier, a third bridge rectifier, and a fourth bridge rectifier. a first component group and a second component group. The transformer contains four transformer components. Each of the transformer elements is coupled between an Ethernet connector and an Ethernet chip, and coupled to a first ground through a first capacitor and a first resistor, and through a second capacitor coupled Connected to a second ground, the first resistor is connected in series with the first capacitor and the first capacitor is coupled to the first ground. The first bridge rectifier has a first contact, a second contact, a third contact, and a fourth contact, wherein the first contact and the second contact are respectively coupled to a power supply The third contact and the fourth contact are respectively coupled to the two of the four transformer components, and respectively coupled to the first resistor and the first capacitor corresponding to the two transformer components A ground terminal. The second bridge rectifier has a first contact, a second contact, a third contact, and a fourth contact, wherein the first contact and the second contact are respectively The third contact and the fourth contact are respectively coupled to the other of the four transformer components, and respectively pass through the first resistor corresponding to each of the other two transformer components and The first capacitor is coupled to the first ground. The third bridge rectifier has a first contact, a second contact, a third contact, and a fourth contact, wherein the third contact and the fourth contact are respectively coupled to the fourth The two of the transformer elements are coupled to the first ground through the first resistor corresponding to each of the two transformer elements and the first capacitor. The fourth bridge rectifier has a first contact, a second contact, a third contact and a fourth contact. The third contact and the fourth contact are respectively coupled to the other of the four transformer components, and respectively coupled to the first resistor and the first capacitor corresponding to the other two transformer components First ground. The first component group includes a first fast reacting diode, a unidirectional transient suppressing diode, and a second fast reacting diode, wherein the unidirectional transient suppressing diode is coupled to the third Between the first contact and the second contact of the bridge rectifier, the first fast reacting diode is forwardly connected in series with the second fast reacting diode, and the unidirectional transient suppressing diode and the first A fast reacting diode and the second fast reacting diode are connected in parallel to each other, and a contact between the first fast reacting diode and the second fast reacting diode is coupled to the first ground. The second component group includes a first fast reacting diode, a unidirectional transient suppressing diode, and a second fast reacting diode, wherein the unidirectional transient suppressing diode is coupled to the fourth Between the first contact and the second contact of the bridge rectifier, the first fast reacting diode is forwardly connected in series with the second fast reacting diode, and the unidirectional transient suppressing diode and the first A fast reacting diode and the second fast reacting diode are connected in parallel to each other, and a contact between the first fast reacting diode and the second fast reacting diode is coupled to the first ground.

In addition, the present invention further discloses a transmission circuit for an Ethernet network, including a transformer, a first bridge rectifier, a second bridge rectifier, a third bridge rectifier, and a fourth bridge rectifier. a first component group and a second component group. The transformer contains four transformer components. Each of the transformer elements is coupled between an Ethernet connector and an Ethernet chip, and coupled to a first ground through a first capacitor and a first resistor, and through a second capacitor coupled Connected to a second ground, the first resistor is connected in series with the first capacitor and the first capacitor is coupled to the first ground. The first bridge rectifier has a first contact, a second contact, a third contact, and a fourth contact, wherein the first contact and the second contact are respectively coupled to a power chip The third contact and the fourth contact are respectively coupled to the two of the four transformer components, and respectively coupled to the first resistor corresponding to each of the two transformer components and the first capacitor Ground terminal. The second bridge rectifier has a first contact, a second contact, a third contact, and a fourth contact, wherein the first contact and the second contact are respectively coupled to the power chip The third contact and the fourth contact are respectively coupled to the other of the four transformer components, and respectively coupled to the first resistor and the first capacitor corresponding to each of the other transformer components First ground. The third bridge rectifier has a first contact, a second contact, a third contact, and a fourth contact, wherein the third contact and the fourth contact are respectively coupled to the four The second of the transformer components is coupled to the first ground via the first resistor corresponding to each of the two transformer components and the first capacitor. The fourth bridge rectifier has a first contact, a second contact, a third contact, and a fourth contact, and the third contact and the fourth contact are respectively coupled to the four transformers The other of the components is coupled to the first ground via the first resistor corresponding to each of the other transformer components and the first capacitor. The first component group includes a first fast reacting diode, a semiconductor discharge tube, and a second a fast response diode, wherein the semiconductor discharge tube is coupled between the first contact and the second contact of the third bridge rectifier, the first fast reacting diode and the second fast reacting diode The body is in series connection, the semiconductor discharge tube is in parallel with the first fast reacting diode and the second fast reacting diode, and the first fast reacting diode and the second fast reacting diode are A contact is coupled to the first ground. The second component group includes a first fast reacting diode, a semiconductor discharge tube, and a second fast reacting diode, wherein the semiconductor discharge tube is coupled to the first contact of the fourth bridge rectifier And the second fast reacting diode is forwardly connected in series with the second fast reacting diode, the semiconductor discharge tube and the first fast reacting diode and the second fast reacting diode The body is connected in parallel, and a contact between the first fast reacting diode and the second fast reacting diode is coupled to the first ground.

In addition, the present invention further discloses a surge protection component for use in a transmission circuit of an Ethernet. The surge protection component includes a first pin, a second pin, a third pin, a first fast reacting diode, a unidirectional transient suppressing diode, and a second fast reacting diode The body, a third fast reacting diode, and a fourth fast reacting diode. The first fast reacting diode is coupled to the first pin. The second fast reacting diode is coupled to the second pin. The first fast reacting diode, the one-way transient suppressing diode is connected in series with the second fast reacting diode. The first fast reacting diode is in series with the second fast reacting diode and is connected in series with the unidirectional transient suppressing diode. The third fast reacting diode is forwardly connected in series with the fourth fast reacting diode. The unidirectional transient suppression diode is forward-connected in parallel with the third fast-reaction diode and the fourth fast-reaction diode. A contact between the third fast reacting diode and the fourth fast reacting diode is coupled to the third pin.

In addition, the present invention further discloses a surge protection component for use in a transmission circuit of an Ethernet. The surge protection component includes a first pin, a second pin, a third pin, a first fast reacting diode, a unidirectional transient suppressing diode, and a second fast reacting diode The body, a third fast reacting diode, and a fourth fast reacting diode. The first fast reacting diode is coupled to the first pin. The second fast reacting diode is coupled to the second pin. The first fast reacting diode, the semiconductor discharge tube is connected in series with the second fast reacting diode. The first fast reacting diode is in series with the second fast reacting diode and is connected in series with the semiconductor discharge tube. The third fast reacting diode is forwardly connected in series with the fourth fast reacting diode. The semiconductor discharge tube is connected in parallel with the third fast reacting diode and the fourth fast reacting diode. A contact between the third fast reacting diode and the fourth fast reacting diode is coupled to the third pin.

In addition, the present invention further discloses a surge protection component for use in a transmission circuit of an Ethernet. The surge protection component includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a bridge rectifier, a first fast reacting diode, and a first A unidirectional transient suppression diode, a second fast reaction diode, a third fast reaction diode, and a fourth fast reaction diode. The bridge rectifier has a first contact, a second contact, a third contact, and a fourth contact, wherein the first contact is coupled to the first pin, and the second contact is coupled The second pin is coupled to the fourth pin, and the fourth contact is coupled to the fifth pin. The first fast reacting diode is coupled to the first pin. The second fast reacting diode is coupled to the second pin. The first fast reacting diode, the one-way transient suppressing diode is connected in series with the second fast reacting diode. The first fast reacting diode is in series with the second fast reacting diode Reverse series connection with the one-way transient suppression diode. The third fast reacting diode is forwardly connected in series with the fourth fast reacting diode. The unidirectional transient suppression diode is forward-connected in parallel with the third fast-reaction diode and the fourth fast-reaction diode. A contact between the third fast reacting diode and the fourth fast reacting diode is coupled to the third pin.

In addition, the present invention further discloses a surge protection component for use in a transmission circuit of an Ethernet. The surge protection component includes a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a bridge rectifier, a first fast reacting diode, and a first A unidirectional transient suppression diode, a second fast reaction diode, a third fast reaction diode, and a fourth fast reaction diode. The bridge rectifier has a first contact, a second contact, a third contact, and a fourth contact. The first contact is coupled to the first pin, and the second contact is coupled to the first contact. The second pin is coupled to the fourth pin, and the fourth contact is coupled to the fifth pin. The first fast reacting diode is coupled to the first pin. The second fast reacting diode is coupled to the second pin. The first fast reacting diode, the semiconductor discharge tube is connected in series with the second fast reacting diode. The first fast reacting diode is in series with the second fast reacting diode and is connected in series with the semiconductor discharge tube. The third fast reacting diode is forwardly connected in series with the fourth fast reacting diode. The semiconductor discharge tube is connected in parallel with the third fast reacting diode and the fourth fast reacting diode. A contact between the third fast reacting diode and the fourth fast reacting diode is coupled to the third pin.

In addition, the present invention further discloses a surge protection component for an Ethernet One of the network transmission circuits. The surge protection component includes a first pin, a second pin, a third pin, a bridge rectifier, a unidirectional transient suppression diode, a first fast reacting diode, and a second Fast reaction diode. The bridge rectifier has a first contact, a second contact, a third contact, and a fourth contact, wherein the third contact is coupled to the first pin, and the fourth contact is coupled The second pin. The unidirectional transient suppression diode is coupled between the first contact and the second contact of the bridge rectifier. The first fast reacting diode is forwardly connected in series with the second fast reacting diode. The unidirectional transient suppression diode is forward-connected in parallel with the first fast-reaction diode and the second fast-reaction diode. One contact between the first fast reacting diode and the second fast reacting diode is coupled to the third pin.

In addition, the present invention further discloses a surge protection component for use in a transmission circuit of an Ethernet. The surge protection component includes a first pin, a second pin, a third pin, a bridge rectifier, a semiconductor discharge tube, a first fast reacting diode, and a second fast reacting diode . The bridge rectifier has a first contact, a second contact, a third contact, and a fourth contact, wherein the third contact is coupled to the first pin, and the fourth contact is coupled The second pin. The semiconductor discharge tube is coupled between the first contact and the second contact of the bridge rectifier. The first fast reacting diode is forwardly connected in series with the second fast reacting diode. The semiconductor discharge tube is connected in parallel with the first fast reacting diode and the second fast reacting diode. One contact between the first fast reacting diode and the second fast reacting diode is coupled to the third pin.

The above objects, technical features, and advantages will be more apparent from the following description.

1‧‧‧Transmission circuit

4‧‧‧Transmission circuit

7‧‧‧Transmission circuit

9‧‧‧Transmission circuit

11‧‧‧Transformers

11a‧‧‧Transformer components

11b‧‧‧Transformer components

11c‧‧‧Transformer components

11d‧‧‧Transformer components

13‧‧‧First Bridge Rectifier

15‧‧‧Second bridge rectifier

17‧‧‧First component group

19‧‧‧Second component group

21‧‧‧Ethernet connector

23‧‧‧Ethernet chip

25‧‧‧Power chip

71‧‧‧Transformers

71a‧‧‧Transformer components

71b‧‧‧Transformer components

71c‧‧‧Transformer components

71d‧‧‧Transformer components

73‧‧‧First Bridge Rectifier

75‧‧‧Second bridge rectifier

76‧‧‧ Third Bridge Rectifier

77‧‧‧Fourth Bridge Rectifier

78‧‧‧First component group

79‧‧‧Second component group

C1‧‧‧first capacitor

C2‧‧‧second capacitor

R1‧‧‧first resistance

G1‧‧‧first ground

G2‧‧‧first ground

P‧‧‧Contact

P1‧‧‧ first contact

P2‧‧‧second junction

P3‧‧‧ third joint

P4‧‧‧fourth joint

D1‧‧‧First Rapid Reaction Dipole

D2‧‧‧Second rapid response diode

D3‧‧‧ third fast-reacting diode

D4‧‧‧ fourth fast-reacting diode

TVS‧‧‧One-way transient suppression diode

SPC‧‧‧ surge protection components

BD‧‧ ‧bridge rectifier

TSS‧‧‧Semiconductor discharge tube

Pin1‧‧‧first pin

Pin2‧‧‧second pin

Pin3‧‧‧ third pin

Pin4‧‧‧fourth pin

Pin5‧‧‧ fifth pin

1 is a schematic diagram of a transmission circuit of a first embodiment of the present invention; FIG. 2 is a schematic diagram of a surge protection element of a second embodiment of the present invention; and FIG. 3 is a surge protection element of a third embodiment of the present invention; 4 is a schematic diagram of a transmission circuit of a fourth embodiment of the present invention; FIG. 5 is a schematic diagram of a surge protection component of a fifth embodiment of the present invention; and FIG. 6 is a surge protection of a sixth embodiment of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 7 is a schematic diagram of a transmission circuit of a seventh embodiment of the present invention; FIG. 8 is a schematic diagram of a surge protection element of an eighth embodiment of the present invention; and FIG. 9 is a transmission of a ninth embodiment of the present invention; A schematic diagram of a circuit; and FIG. 10 is a schematic diagram of a surge protection element of a tenth embodiment of the present invention.

The present invention will be explained by the following examples, but the embodiments of the present invention are not intended to limit the invention to any specific environment, application or manner as described in the following embodiments. Therefore, the following examples are merely illustrative of the invention and are not intended to limit the invention. In the following embodiments and figures, elements that are not directly related to the present invention have been omitted and are not shown, and the dimensional ratios between the elements in the drawings are only for ease of understanding, and are not intended to be limited to The actual implementation ratio.

A first embodiment of the present invention is shown in FIG. 1, which depicts one for an Ethernet network. The transmission circuit of the road 1. The transmission circuit 1 includes a transformer 11, a first bridge rectifier 13, a second bridge rectifier 15, a first component group 17, and a second component group 19. The transformer 11 includes four transformer elements 11a, 11b, 11c, 11d. Each of the transformer elements 11a, 11b, 11c, and 11d is coupled between an Ethernet connector 21 and an Ethernet chip 23, and coupled to a first through a first capacitor C1 and a first resistor R1. The ground terminal G1 is coupled to a second ground terminal G2 through a second capacitor C2. . It should be noted that the first ground terminal G1 refers to the ground end of the device casing, that is, the external ground terminal; however, the second ground terminal G2 refers to the common ground terminal, that is, the internal ground terminal, and the voltage is usually 0 volt (V). .

The first bridge rectifier 13 has a first contact P1, a second contact P2, a third contact P3 and a fourth contact P4. The first contact P1 and the second contact P2 are respectively coupled to a power supply chip 25 . The third contact P3 is coupled to the transformer element 11a, and is coupled to the first ground terminal G1 through the first resistor R1 of the transformer component 11a and the first capacitor C1. The fourth contact P4 is coupled to the transformer element 11b, and is coupled to the first ground terminal G1 through the first resistor R1 of the transformer component 11b and the first capacitor C1. Similarly, the second bridge rectifier 15 has a first contact P1, a second contact P2, a third contact P3, and a fourth contact P4. The first contact P1 and the second contact P2 are respectively coupled to the power source chip 25 . The third contact P3 is coupled to the transformer component 11c, and is coupled to the first ground terminal G1 through the first resistor R1 of the second transformer component 11c and the first capacitor C1. The fourth contact P4 is coupled to the transformer element 11d, and is coupled to the first ground terminal G1 through the first resistor R1 of the second transformer component 11d and the first capacitor C1.

The first component group 17 and the second component group 19 simultaneously provide protection for common mode surges and differential mode surges in the transmission circuit 1. Specifically, the first component group 17 includes a first fast reacting diode D1, a one-way transient suppression diode TVS, and a second fast. The fast reacting diode D2, the third fast reacting diode D3, and the fourth fast reacting diode D4. The first fast-reacting diode D1, the one-way transient suppression diode TVS and the second fast-reaction diode D2 are connected in series. The first fast-reacting diode D1 is in series with the second fast-reacting diode D2 and is connected in series with the unidirectional transient suppression diode TVS. The first fast-reacting diode D1 is coupled to the first junction P1 of the first bridge rectifier 13 , and the second fast-reaction diode is coupled to the second junction P2 of the first bridge rectifier 13 . The third fast reacting diode D3 is forwardly connected in series with the fourth fast reacting diode D4. The unidirectional transient suppression diode TVS is in parallel with the third fast reaction diode D3 and the fourth fast reaction diode D4. A contact P between the third fast reacting diode D2 and the fourth fast reacting diode D4 is coupled to the first ground.

The second component group 19 includes a first fast reacting diode D1, a unidirectional transient suppressing diode TVS, a second fast reacting diode D2, a third fast reacting diode D3, and a fourth Fast reaction diode D4. The first fast-reacting diode D1, the one-way transient suppression diode TVS and the second fast-reaction diode D2 are connected in series. The first fast-reacting diode D1 is in series with the second fast-reacting diode D2 and is connected in series with the unidirectional transient suppression diode TVS. The first fast-reacting diode D1 is coupled to the first junction P1 of the second bridge rectifier 15 . The second fast reacting diode D2 is coupled to the second junction P2 of the second bridge rectifier 15 . The third fast reacting diode D3 is forwardly connected in series with the fourth fast reacting diode D4. The unidirectional transient suppression diode TVS is in parallel with the third fast reaction diode D3 and the fourth fast reaction diode D4. A contact P between the third fast-reacting diode D3 and the fourth fast-reacting diode D4 is coupled to the first ground terminal G1.

A second embodiment of the present invention, as shown in Fig. 2, depicts a surge protection element SPC. The surge protection element SPC is used for one of the Ethernet transmission circuits, such as the transmission circuit 1 of the first embodiment. In detail, the first component group 17 and the second component group 19 described in the first embodiment are integrated into the transmission circuit 1 in a discrete component manner, or may be integrated into a surge protection component SPC and then placed. In the transmission circuit 1. The surge protection component SPC can utilize the semiconductor packaging technology to combine the first fast reacting diode D1, the unidirectional transient suppression diode TVS, the second fast reacting diode D2, the third fast reacting diode D3, and the first The four fast-reacting diodes D4 are packaged into a single component or integrated into a single germanium substrate by semiconductor fabrication techniques and packaged into a single component.

As shown in FIG. 2, the surge protection component SPC includes a first pin Pin1, a second pin Pin2, a third pin Pin3, a first fast reacting diode D1, and a one-way transient suppression. The diode TVS, a second fast reacting diode D2, a third fast reacting diode D3, and a fourth fast reacting diode D4. The first fast reacting diode D1 is coupled to the first pin Pin1. The second fast reacting diode D2 is coupled to the second pin Pin2. The first fast-reacting diode D1, the one-way transient suppression diode TVS and the second fast-reaction diode D2 are connected in series. The first fast-reacting diode D1 is in series with the second fast-reacting diode D2 and is connected in series with the unidirectional transient suppression diode TVS. The third fast reacting diode D3 is forwardly connected in series with the fourth fast reacting diode D4. The unidirectional transient suppression diode TVS is in parallel with the third fast reaction diode D3 and the fourth fast reaction diode D4. A contact P between the third fast reacting diode D3 and the fourth fast reacting diode D4 is coupled to the third pin Pin3.

A third embodiment of the present invention is shown in Fig. 3, which depicts a surge protection element SPC. The surge protection component SPC is used for one transmission circuit of an Ethernet network, for example, the first embodiment Transmission circuit 1. In detail, unlike the second embodiment, the surge protection component SPC of the present embodiment further includes a bridge rectifier BD (such as the first bridge rectifier 13 and the second bridge rectifier 15 of the first embodiment) and the first The fast reacting diode D1, the unidirectional transient suppression diode TVS, the second fast reacting diode D2, the third fast reacting diode D3, and the fourth fast reacting diode D4 are integrated into one element.

In this embodiment, the surge protection component SPC includes a first pin Pin1, a second pin Pin2, a third pin Pin3, a fourth pin Pin4, a fifth pin Pin5, and a bridge rectifier. BD, a first fast-reacting diode D1, a one-way transient suppression diode TVS, a second fast-reaction diode D2, a third fast-reaction diode D3, and a fourth fast-reaction diode Body D4. The bridge rectifier BD has a first contact P1, a second contact P2, a third contact P3 and a fourth contact P4. The first contact P1 is coupled to the first pin Pin1. The second contact P2 is coupled to the second pin Pin3. The third contact P3 is coupled to the fourth pin Pin4. The fourth contact P4 is coupled to the fifth pin Pin5.

The first fast reacting diode D1 is coupled to the first pin Pin1. The second fast reacting diode D2 is coupled to the second pin Pin2. The first fast reacting diode D1, the one-way transient suppressing diode TVS is connected in series with the second fast reacting diode D2. The first fast-reacting diode D1 is in series with the second fast-reacting diode D2 and is connected in series with the unidirectional transient suppression diode TVS. The third fast reacting diode D3 is forwardly connected in series with the fourth fast reacting diode D4. The unidirectional transient suppression diode TVS is in parallel with the third fast reaction diode D3 and the fourth fast reaction diode D4. A contact P between the third fast reacting diode D3 and the fourth fast reacting diode D4 is coupled to the third pin Pin3.

A fourth embodiment of the present invention, as shown in FIG. 4, depicts a transmission circuit 3 for an Ethernet network. The connection between the components and the components of the transmission circuit 3 is substantially the same as that of the transmission circuit 1, and the only difference is that the first component group 17 and the second component group 19 are unidirectional transient suppression diode semiconductor TVs for TVS. TSS is replaced, so it will not be described here. In the present embodiment, the first component group 17 and the second component group 19 also provide protection for common mode surges and differential mode surges.

A fifth embodiment of the present invention is shown in Fig. 5, which depicts a surge protection element SPC. The surge protection element SPC is used for one of the Ethernet transmission circuits, such as the transmission circuit 3 of the fifth embodiment. Compared with the second embodiment, the surge protection element SPC of the present embodiment uses a semiconductor discharge tube TSS instead of the one-way transient suppression diode TVS. For those skilled in the art, the surge protection element SPC of the present embodiment can be easily understood from the description of the second embodiment and the comparison between the second and fifth figures of the drawings, and thus will not be further described herein.

A sixth embodiment of the present invention is shown in Fig. 6, which depicts a surge protection element SPC. The surge protection element SPC is used for one of the Ethernet transmission circuits, such as the transmission circuit 3 of the fifth embodiment. Compared with the third embodiment, the surge protection element SPC of the present embodiment uses a semiconductor discharge tube TSS instead of the one-way transient suppression diode TVS. Since the person having ordinary knowledge in the art can easily understand the surge protection element SPC of the present embodiment according to the description of the third embodiment and the comparison of the third and sixth figures of the drawings, no further details are provided herein.

A seventh embodiment of the present invention, as shown in FIG. 7, depicts a transmission circuit 7 for an Ethernet network. The transmission circuit 7 includes a transformer 71, a first bridge rectifier 73, and a second bridge rectifier. 75. A third bridge rectifier 76, a fourth bridge rectifier 77, a first component group 78 and a second component group 79. The transformer 71 includes four transformer elements 71a, 71b, 71c, 71d. Each of the transformer elements 71a, 71b, 71c, and 71d is coupled between an Ethernet connector 21 and an Ethernet chip 23, and coupled to the first through a first capacitor C1 and a first resistor R1. The ground terminal G1 is coupled to a second ground terminal G2 through a second capacitor C2. The first resistor R1 is connected in series with the first capacitor C1 and the first capacitor C1 is coupled to the first ground terminal G1.

The first bridge rectifier 73 has a first contact P1, a second contact P2, a third contact P3 and a fourth contact P4. The first contact P1 and the second contact P2 are respectively coupled to a power supply chip 25 . The third contact P3 is coupled to the transformer element 71a, and is coupled to the first ground terminal G1 through the first resistor R1 of the transformer component 71a and the first capacitor C1. The fourth contact P4 is coupled to the transformer element 71b, and is coupled to the first ground terminal G1 through the first resistor R1 of the transformer component 71b and the first capacitor C1.

Similarly, the second bridge rectifier 75 has a first contact P1, a second contact P2, a third contact P3, and a fourth contact P4. The first contact P1 and the second contact P2 are respectively coupled to the power source chip 25 . The third contact P3 is coupled to the transformer element 71c, and is coupled to the first ground terminal G1 through the first resistor R1 of the transformer component 71c and the first capacitor C1. The fourth contact P4 is coupled to the transformer element 71d, and is coupled to the first ground terminal G1 through the first resistor R1 of the transformer component 71d and the first capacitor C1.

The first component group 78 and the third bridge rectifier 76 and the second component group 79 and the fourth bridge rectifier 77 simultaneously provide protection for common mode surges and differential mode surges in the transmission circuit 7. Specifically, the third bridge rectifier 76 has a first contact P1, a second contact P2, a third contact P3, and a fourth contact P4. The third contact P3 is coupled to the transformer element 71a, and is coupled to the first ground terminal G1 through the first resistor R1 of the transformer component 71a and the first capacitor C1. The fourth contact P4 is coupled to the transformer element 71b and passes through the first resistor R1 and the first power of the transformer component 71b. The container C1 is coupled to the first ground end G1. Similarly, the fourth bridge rectifier 77 has a first contact P1, a second contact P2, a third contact P3, and a fourth contact P4. The third contact P3 is coupled to the transformer element 71c, and is coupled to the first ground terminal G1 through the first resistor R1 of the transformer component 71c and the first capacitor C1. The fourth contact P4 is coupled to the transformer element 71d, and is coupled to the first ground terminal G1 through the first resistor R1 of the transformer component 71d and the first capacitor C1.

The first component group 78 includes a first fast reacting diode D1, a unidirectional transient suppressing diode TVS, and a second fast reacting diode D2. The unidirectional transient suppression diode TVS is coupled between the first junction P1 and the second junction P2 of the third bridge rectifier 76. The first fast reacting diode D1 is forwardly connected in series with the second fast reacting diode D2. The unidirectional transient suppression diode TVS is connected in parallel with the first fast reacting diode D1 and the second fast reacting diode. A contact P between the first fast reacting diode D1 and the second fast reacting diode D2 is coupled to the first ground terminal G1.

The second component group 79 includes a first fast reacting diode D1, a unidirectional transient suppressing diode TVS, and a second fast reacting diode D2. The unidirectional transient suppression diode TVS is coupled between the first junction P1 and the second junction P2 of the fourth bridge rectifier 77. The first fast reacting diode D1 is forwardly connected in series with the second fast reacting diode D2. The unidirectional transient suppression diode TVS is connected in parallel with the first fast reaction diode D1 and the second fast reaction diode D2. A contact P between the first fast reacting diode D1 and the second fast reacting diode D2 is coupled to the first ground terminal G1.

An eighth embodiment of the present invention, as shown in Fig. 8, depicts a surge protection element SPC. The surge protection element SPC is used for one of the Ethernet transmission circuits, such as the transmission circuit 7 of the seventh embodiment. In detail, the first component group 78 and the third bridge type described in the seventh embodiment The streamer 76 and the second component group 79 and the fourth bridge rectifier 77 are integrated into the transmission circuit 7 in a discrete component manner, and may be integrated into a surge protection component SPC and then placed in the transmission circuit 7. The surge protection component SPC can package the first fast-reacting diode D1, a one-way transient suppression diode TVS, a second fast-reaction diode D2, and a bridge rectifier BD into a single semiconductor package technology. The components, or through semiconductor fabrication techniques, are integrated on the same substrate and packaged into a single component.

The surge protection component SPC includes a first pin Pin1, a second pin Pin2, a third pin Pin3, a bridge rectifier BD, a unidirectional transient suppression diode TVS, and a first fast response diode Body D1 and a second fast reacting diode D2. The bridge rectifier BD has a first contact P1, a second contact P2, a third contact P3 and a fourth contact P4. The third contact P3 is coupled to the first pin Pin1, and the fourth contact P4 is coupled to the second pin Pin2. The unidirectional transient suppression diode TVS is coupled between the first contact P1 and the second contact P2 of the bridge rectifier BD. The first fast reacting diode D1 is forwardly connected in series with the second fast reacting diode D2. The unidirectional transient suppression diode TVS is connected in parallel with the first fast reaction diode D1 and the second fast reaction diode D2. One contact P between the first fast-reacting diode D1 and the second fast-reacting diode D2 is coupled to the third pin Pin3.

A ninth embodiment of the present invention is shown in Fig. 9, which depicts a transmission circuit 9 for an Ethernet network. The connection between the components and the components of the transmission circuit 9 is substantially the same as that of the transmission circuit 4, the only difference being the semiconductor discharge tube for the unidirectional transient suppression diode TVS of the first component group 78 and the second component group 79. TSS is replaced, so it will not be described here. The first component group 78 and the third bridge rectifier 76 and the second component group 79 and the fourth bridge rectifier 77 are In the embodiment, protection is also provided for common mode glitch and differential mode glitch. At the same time, protection is provided to the common mode glitch and the differential mode glitch in the transmission circuit 9.

A tenth embodiment of the present invention is shown in Fig. 10, which depicts a surge protection element SPC. The surge protection element SPC is used for one of the Ethernet transmission circuits, such as the transmission circuit 9 of the ninth embodiment. Compared with the eighth embodiment, the surge protection element SPC of the present embodiment uses a semiconductor discharge tube TSS instead of the one-way transient suppression diode TVS. Since the person having ordinary knowledge in the art can easily understand the surge protection element SPC of the present embodiment according to the description of the eighth embodiment and the comparison between FIG. 8 and FIG. 10, the detailed description thereof will not be repeated.

In summary, the transmission circuit and the surge protection component of the present invention have the advantages of simultaneously providing protection for common mode surges and differential mode surges. In addition, compared with the conventional transmission circuit, the present invention can effectively reduce the number of components required for the surge protection circuit, thereby greatly saving the occupied printed circuit board (PCB), and completely using the semiconductor component to achieve common mode protrusion. Wave and differential mode surge protection. Furthermore, the integrated surge protection component has up to 5 pins, which greatly simplifies the circuit layout.

The embodiments described above are only intended to illustrate the embodiments of the present invention, and to explain the technical features of the present invention, and are not intended to limit the scope of protection of the present invention. Any change or equalization that can be easily accomplished by those skilled in the art is within the scope of the present invention. The scope of the invention should be determined by the scope of the patent application.

1‧‧‧Transmission circuit

11‧‧‧Transformers

11a‧‧‧Transformer components

11b‧‧‧Transformer components

11c‧‧‧Transformer components

11d‧‧‧Transformer components

13‧‧‧First Bridge Rectifier

15‧‧‧Second bridge rectifier

17‧‧‧First component group

19‧‧‧Second component group

21‧‧‧Ethernet connector

23‧‧‧Ethernet chip

25‧‧‧Power chip

C1‧‧‧first capacitor

C2‧‧‧second capacitor

R1‧‧‧first resistance

G1‧‧‧first ground

G2‧‧‧first ground

P‧‧‧Contact

P1‧‧‧ first contact

P2‧‧‧second junction

P3‧‧‧ third joint

P4‧‧‧fourth joint

D1‧‧‧First Rapid Reaction Dipole

D2‧‧‧Second rapid response diode

D3‧‧‧ third fast-reacting diode

D4‧‧‧ fourth fast-reacting diode

TVS‧‧‧One-way transient suppression diode

Claims (6)

A transmission circuit for an Ethernet network, comprising: a transformer comprising four transformer components, each of the transformer components being coupled to an Ethernet connector and an Ethernet chip, and transmitting through a a capacitor and a first resistor are coupled to the first ground, and coupled to the second ground through a second capacitor, the first resistor is coupled in series with the first capacitor and the first capacitor is coupled to the a first grounding terminal; a first bridge rectifier having a first contact, a second contact, a third contact, and a fourth contact, wherein the first contact and the second contact are respectively coupled Connected to a power supply chip, the third contact and the fourth contact are respectively coupled to two of the four transformer components, and respectively pass through the first resistor and the first capacitor corresponding to each of the two transformer components The first bridge is coupled to the first ground; the second bridge rectifier has a first contact, a second contact, a third contact, and a fourth contact, the first contact and the second connection Points are respectively coupled to the power supply chip, and the third contact and the fourth contact are respectively coupled to the four The first component is coupled to the first ground via the first resistor corresponding to each of the other transformer components; and the first component group includes a first fast response a polar body, a one-way transient suppression diode, a second fast-reaction diode, a third fast-reaction diode, and a fourth fast-reaction diode, the first fast-reacting diode, a unidirectional transient suppression diode is connected in series with the second fast reaction diode, the first fast reaction diode is in series with the second fast reaction diode and the unidirectional transient suppression diode In the reverse series, the first fast reacting diode is coupled to the first bridge rectifier Between the first contact and the unidirectional transient suppression diode, the second fast reacting diode is coupled to the second contact of the first bridge rectifier and the unidirectional transient suppression diode Between the bodies, the third fast reacting diode is forwardly connected in series with the fourth fast reacting diode, the unidirectional transient suppressing diode and the third fast reacting diode and the fourth fast reacting second a pole body is connected in parallel, a contact between the third fast reacting diode and the fourth fast reacting diode is coupled to the first ground end; and a second component group includes a first fast reaction a diode, a unidirectional transient suppression diode, a second fast reacting diode, a third fast reacting diode, and a fourth fast reacting diode, the first fast reacting diode, The one-way transient suppression diode is connected in series with the second fast-reaction diode, and the first fast-reaction diode is connected in series with the second fast-reaction diode and the one-way transient suppression diode The first fast reacting diode is coupled to the first contact of the second bridge rectifier and the single Between the transient suppression diodes, the second fast reacting diode is coupled between the second junction of the second bridge rectifier and the unidirectional transient suppression diode, and the third rapid reaction a diode is forwardly connected in series with the fourth fast-reaction diode, and the unidirectional transient suppression diode is in parallel with the third fast-reaction diode and the fourth fast-reaction diode, and the third A contact between the fast reacting diode and the fourth fast reacting diode is coupled to the first ground. A transmission circuit for an Ethernet network, comprising: a transformer comprising four transformer components, each of the transformer components being coupled to an Ethernet connector and an Ethernet chip, and transmitting through a One electric A first resistor is coupled to a first ground, and a second capacitor is coupled to the second ground. The first resistor is coupled in series with the first capacitor and the first capacitor is coupled to the first a grounding terminal; a first bridge rectifier having a first contact, a second contact, a third contact, and a fourth contact, wherein the first contact and the second contact are respectively coupled And the third contact and the fourth contact are respectively coupled to the two of the four transformer components, and respectively pass through the first resistor corresponding to each of the two transformer components and the first capacitor coupling Connected to the first grounding terminal; a second bridge rectifier having a first contact, a second contact, a third contact, and a fourth contact, the first contact and the second contact The third contact and the fourth contact are respectively coupled to the other of the four transformer components, and respectively pass through the first resistor corresponding to each of the other two transformer components, and The first capacitor is coupled to the first ground end; a first component group includes a first fast reacting diode a semiconductor discharge tube, a second fast reacting diode, a third fast reacting diode, and a fourth fast reacting diode, the first fast reacting diode, the semiconductor discharge tube and the second a fast-reacting diode is connected in series, the first fast-reacting diode is in series with the second fast-reacting diode and is connected in series with the semiconductor discharge tube, and the first fast-reacting diode is coupled to the first Between the first contact of the bridge rectifier and the semiconductor discharge tube, the second fast reacting diode is coupled between the second contact of the first bridge rectifier and the semiconductor discharge tube, a third fast reacting diode is forwardly connected in series with the fourth fast reacting diode, the semiconductor discharge tube and the third fast reacting diode and the fourth fast The reaction diodes are connected in parallel, one contact between the third fast reacting diode and the fourth fast reacting diode is coupled to the first ground end; and a second component group includes a first a fast reacting diode, a semiconductor discharge tube, a second fast reacting diode, a third fast reacting diode, and a fourth fast reacting diode, the first fast reacting diode, the semiconductor discharge The tube is connected in series with the second fast reacting diode, the first fast reacting diode is in series with the second fast reacting diode and is connected in series with the semiconductor discharge tube, the first fast reacting diode The second fast reacting diode is coupled between the first contact of the second bridge rectifier and the semiconductor discharge tube, and the second fast reacting diode is coupled to the second contact of the second bridge rectifier and the semiconductor discharge Between the tubes, the third fast reacting diode is forwardly connected in series with the fourth fast reacting diode, and the semiconductor discharge tube is connected in parallel with the third fast reacting diode and the fourth fast reacting diode The third fast reacting diode and the fourth fast Should one contact point between the diode coupled to the first ground terminal. A transmission circuit for an Ethernet network, comprising: a transformer comprising four transformer components, each of the transformer components being coupled to an Ethernet connector and an Ethernet chip, and transmitting through a a capacitor and a first resistor are coupled to the first ground, and coupled to the second ground through a second capacitor, the first resistor is coupled in series with the first capacitor and the first capacitor is coupled to the a first grounding terminal; a first bridge rectifier having a first contact, a second contact, a third contact, and a fourth contact, wherein the first contact and the second contact are respectively coupled Connected to a power chip, the third contact and the fourth contact are respectively coupled to the four transformers One of the components is coupled to the first ground through the first resistor corresponding to each of the two transformer components and the first capacitor; a second bridge rectifier having a first contact and a second a first contact and a second contact are respectively coupled to the power supply chip, and the third contact and the fourth contact are respectively coupled to the The other of the four transformer components is coupled to the first ground through the first resistor corresponding to each of the other transformer components and the first capacitor; a third bridge rectifier has a first connection a second contact, a third contact, and a fourth contact, wherein the third contact and the fourth contact are respectively coupled to the two of the four transformer components, and respectively transmit corresponding The first resistor of the two transformer elements and the first capacitor are coupled to the first ground end; a fourth bridge rectifier has a first contact, a second contact, a third contact, and a a fourth contact, the third contact and the fourth contact are respectively coupled to the four transformer components The second component is coupled to the first ground via the first resistor and the first capacitor corresponding to each of the other two transformer components; a first component group includes a first fast reacting diode, a unidirectional transient suppression diode and a second fast response diode, the unidirectional transient suppression diode being coupled between the first contact and the second contact of the third bridge rectifier The first fast reacting diode is forwardly connected in series with the second fast reacting diode, and the one-way transient suppressing diode is positive with the first fast reacting diode and the second fast reacting diode Parallel, a contact between the first fast reacting diode and the second fast reacting diode is coupled to the first ground end; and a second component group including a first fast reacting diode ,A single And a unidirectional transient suppression diode coupled between the first contact and the second contact of the fourth bridge rectifier, wherein the unidirectional transient suppression diode is coupled to the second junction The first fast reacting diode is forwardly connected in series with the second fast reacting diode, and the unidirectional transient suppressing diode is forward-parallel to the first fast reacting diode and the second fast reacting diode And a contact between the first fast reacting diode and the second fast reacting diode is coupled to the first ground. A transmission circuit for an Ethernet network, comprising: a transformer comprising four transformer components, each of the transformer components being coupled to an Ethernet connector and an Ethernet chip, and transmitting through a a capacitor and a first resistor are coupled to the first ground, and coupled to the second ground through a second capacitor, the first resistor is coupled in series with the first capacitor and the first capacitor is coupled to the a first grounding terminal; a first bridge rectifier having a first contact, a second contact, a third contact, and a fourth contact, wherein the first contact and the second contact are respectively coupled Connected to a power supply chip, the third contact and the fourth contact are respectively coupled to two of the four transformer components, and respectively pass through the first resistor and the first capacitor corresponding to each of the two transformer components The first bridge is coupled to the first ground; the second bridge rectifier has a first contact, a second contact, a third contact, and a fourth contact, the first contact and the second connection Points are respectively coupled to the power supply chip, and the third contact and the fourth contact are respectively coupled to the four And the other one of the voltage components is coupled to the first ground through the first resistor corresponding to each of the other transformer components and the first capacitor; a third bridge rectifier having a first contact a second contact, a first a third contact and a fourth contact, wherein the third contact and the fourth contact are respectively coupled to the two of the four transformer components, and respectively pass through the first resistor corresponding to each of the two transformer components And the first capacitor is coupled to the first ground end; a fourth bridge rectifier has a first contact, a second contact, a third contact, and a fourth contact, the third contact And the fourth contact is coupled to the other of the four transformer components, and respectively coupled to the first resistor corresponding to each of the other transformer components and the first capacitor is coupled to the first ground; a first component group includes a first fast-reacting diode, a semiconductor discharge tube, and a second fast-reacting diode, the semiconductor discharge tube being coupled to the first contact of the third bridge rectifier Between the second contacts, the first fast reacting diode is forwardly connected in series with the second fast reacting diode, the semiconductor discharge tube and the first fast reacting diode and the second fast reacting diode Forward parallel, the first fast reacting diode and the second fast reacting second One contact between the body is coupled to the first ground end; and a second component group includes a first fast reacting diode, a semiconductor discharge tube and a second fast reacting diode, the semiconductor discharge tube Coupling between the first contact and the second contact of the fourth bridge rectifier, the first fast reacting diode is forwardly connected in series with the second fast reacting diode, and the semiconductor discharge tube and the The first fast-reacting diode and the second fast-reacting diode are connected in parallel, and a contact between the first fast-reacting diode and the second fast-reacting diode is coupled to the first ground . A surge protection component for a transmission circuit of an Ethernet network, The surge protection component comprises: a first pin; a second pin; a third pin; a fourth pin; a fifth pin; a bridge rectifier having a first contact and a second a first contact is coupled to the first pin, the second contact is coupled to the second pin, and the third contact is coupled to the first contact a fourth pin coupled to the fifth pin; a unidirectional transient suppression diode; a first fast reacting diode coupled to the first pin and coupled to the bridge a first contact between the first rectifier and the unidirectional transient suppression diode; a second fast response diode coupled to the second pin and coupled to the second of the bridge rectifier a contact between the contact and the one-way transient suppression diode; a third fast reacting diode; and a fourth fast reacting diode; wherein the first fast reacting diode, the one-way transient The suppression diode is connected in series with the second fast reaction diode, and the first fast reaction diode is in series with the second fast reaction diode and is opposite to the one-way transient suppression diode Series, the third diode fast response speed and the fourth a fast-reacting diode is connected in series, the unidirectional transient suppression diode is in parallel with the third fast-reaction diode and the fourth fast-reaction diode, and the third fast-reaction diode is One of the contacts between the fourth fast reacting diodes is coupled to the third pin. A surge protection component for a transmission circuit of an Ethernet network, the surge protection component comprising: a first pin; a second pin; a third pin; a fourth pin; a fifth pin; a bridge rectifier having a first contact, a second contact, a third contact, and a fourth contact, the first contact coupled to the first pin, the second The contact is coupled to the second pin, the third contact is coupled to the fourth pin, the fourth contact is coupled to the fifth pin; a semiconductor discharge tube; a first fast reacting diode, The first pin is coupled to the first contact of the bridge rectifier and the semiconductor discharge tube; a second fast reacting diode is coupled to the second pin and coupled Between the second contact of the bridge rectifier and the semiconductor discharge tube; a third fast reacting diode; and a fourth fast reacting diode; wherein the first fast reacting diode, the a semiconductor discharge tube is connected in series with the second fast reacting diode, the first fast reacting diode and the first The two fast-reacting diodes are connected in series in the forward direction and in series with the semiconductor discharge tube, and the third fast-reaction diode is forwardly connected in series with the fourth fast-reaction diode, and the semiconductor discharge tube and the third rapid reaction The diode and the fourth fast-reacting diode are connected in parallel, and a contact between the third fast-reacting diode and the fourth fast-reacting diode is coupled to the third pin.