TW201404028A - Circuit and method for rectifying - Google Patents

Abstract

A circuit for rectifying includes a first detection circuit coupled to an end of a secondary winding of a transformer; a first high frequency electronic switch coupled to said first detection circuit and a ground wire; a second detection circuit coupled to another end of said secondary winding; a second high frequency electronic switch coupled to said second detection circuit and said ground wire; a first drive circuit coupled to said first high frequency electronic switch and said first detection circuit configured to control said first high frequency electronic switch based on a first drive current generated by said first detection circuit on a current flowing through said first high frequency electronic switch; and a second drive ciruit coupled to said second high frequency electronic switch and said second detection circuit configured to control said second high frequency electronic switch based on a second drive current generated by said second detection circuit on a current flowing through said second high frequency electronic switch.

Description

Rectifier circuit and rectification method

The invention relates to the field of electronic technology, and in particular to a rectifier circuit and a rectification method.

FIG. 1 is a circuit diagram of a full-wave rectification circuit 100 in the prior art. In the full-wave rectifying circuit 100, the secondary winding T1 of the transformer is usually a center tap type. For a large transformer, the center-tapped winding causes a thicker wire package due to a larger current, thereby making the structure of the transformer more complicated. The craftsmanship is not good. On the other hand, the rectifying circuit in the prior art mostly uses a rectifying diode, such as the rectifying diode D1 and the rectifying diode D2 used in the full-wave rectifying circuit 100 of FIG. 1, because the loss of the rectifying diode is large. The loss is more prominent especially in the case of low voltage and large current, thus causing a large loss of the entire full-wave rectifier circuit 100.

An object of the present invention is to provide a rectifier circuit comprising: a first detection circuit coupled to one end of a primary winding of a transformer; a first high frequency electronic switch coupled to the first detection circuit and a ground line a second detection circuit coupled to the other end of the secondary winding; a second high frequency electronic switch coupled between the second detection circuit and the ground line; a first drive circuit coupled Connecting to the first detecting circuit and the first high frequency electronic switch, controlling the first high frequency according to the first driving circuit generated by the first detecting circuit based on a current flowing through the first high frequency electronic switch An electronic switch; and a second driving circuit coupled to the second detecting circuit and the second high frequency electronic switch, according to the second detecting circuit generating a current based on a current flowing through the second high frequency electronic switch A second drive current controls the second high frequency electronic switch.

The present invention also provides a rectification method, comprising: a first detection circuit inducing a current flowing through a first high frequency electronic switch, generating a first driving current according to the current; and a first driving circuit according to the first driving current Controlling the first high frequency electronic switch; a second detecting power The circuit induces a current flowing through a second high frequency electronic switch to generate a second driving current according to the current; and a second driving circuit controls the second high frequency electronic switch according to the second driving current.

1‧‧‧Transformer

2‧‧‧Filter circuit

31‧‧‧First detection circuit

32‧‧‧Second detection circuit

41‧‧‧First high frequency electronic switch

42‧‧‧Second high frequency electronic switch

51‧‧‧First drive circuit

52‧‧‧Second drive circuit

100‧‧‧Full-wave rectifier circuit

200‧‧‧Rectifier circuit

300‧‧‧Rectifier circuit

511‧‧‧First charging module

512‧‧‧First Control Module

513‧‧‧First drive module

521‧‧‧Second charging module

522‧‧‧Second control module

523‧‧‧Second drive module

600‧‧‧ Flowchart

602~608‧‧‧Steps

The technical method of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments to make the features and advantages of the present invention more obvious. 1 is a schematic circuit diagram of a full-wave rectification circuit in the prior art; FIG. 2 is a schematic structural view of a rectification circuit according to an embodiment of the present invention; and FIG. 3 is a schematic diagram of another embodiment of the present invention. FIG. 4A is a schematic structural diagram of a first driving circuit according to an embodiment of the present invention; FIG. 4B is a schematic structural view of a second driving circuit according to an embodiment of the present invention; A circuit configuration diagram of a second driving circuit according to an embodiment of the present invention; and FIG. 6 is a flow chart showing a rectification method according to an embodiment of the present invention.

A detailed description of the embodiments of the present invention will be given below. While the invention will be described in conjunction with the embodiments, it is understood that the invention is not limited to the embodiments. Rather, the invention is to cover various modifications, equivalents, and equivalents of the invention as defined by the scope of the appended claims.

In addition, in the following detailed description of the embodiments of the invention However, it will be understood by those of ordinary skill in the art that the present invention may be practiced without these specific details. In other instances, well-known methods, procedures, components, and circuits have not been described in detail in order to facilitate the invention.

2 is a block diagram showing the structure of a rectifier circuit 200 in accordance with an embodiment of the present invention. The rectifier circuit 200 includes a first detection circuit 31, a second detection circuit 32, a first high frequency electronic switch 41, a second high frequency electronic switch 42, a first drive circuit 51, and a second drive circuit 52. The first detecting circuit 31 is coupled to one end of the secondary winding of the transformer 1 , the first high frequency electronic switch 41 and the first driving circuit 51 . The first high frequency electronic switch 41 is coupled to the first driving circuit 51. One end of the second detecting circuit 32 is coupled to the other end of the secondary winding of the transformer 1 , the second high frequency electronic switch 42 and the second driving circuit 52 . The second high frequency electronic switch 42 is coupled to the first driving circuit 52. The first detecting circuit 31 senses a current flowing through the first high frequency electronic switch 41, generates a first driving current, and transmits the generated first driving current to the first driving circuit 51. The first driving circuit 51 controls the on or off of the first high frequency electronic switch 41 in accordance with the received first driving current. The second detecting circuit 32 senses a current flowing through the second high frequency electronic switch 42, generates a second driving current, and transmits the generated second driving current to the second driving circuit 52. The second driving circuit 52 controls the on or off of the second high frequency electronic switch 42 in accordance with the received second driving current.

Preferably, in an embodiment, the rectifier circuit 200 may further include a filter circuit 2 coupled to both ends of the secondary winding of the transformer 1 and a ground line. The filter circuit 2 is for reducing the chopping current of the rectifier circuit.

FIG. 3 is a circuit configuration diagram of a rectifier circuit 300 according to another embodiment of the present invention. In the rectifying circuit 300, preferably, in an embodiment, the first high frequency electronic switch 41 and the second high frequency electronic switch 42 are a first metal oxide semiconductor field effect transistor Q1 and a second metal oxide, respectively. The semiconductor field effect transistor Q2, the first detecting circuit 31 and the second detecting circuit 32 are the first current comparator CT1 and the second current comparator CT2, respectively, and the first driving circuit 51 and the second driving circuit 52 have the same structure. The structure of the first drive circuit 51 and the second drive circuit 52 is not shown in FIG.

Specifically, the anode of the secondary winding T1 of the transformer 1 is coupled to one end of the first filter inductor L1 and the first current comparator CT1. The other end of the first current comparator CT1 is coupled to the drain of the first metal oxide semiconductor field effect transistor Q1. The inductance of the first current comparator CT1 has two terminals (ie, A5 terminal and A6 terminal) coupled to the two input terminals of the first driving circuit 51 (not shown in FIG. 3). The gate and the source of the first metal oxide semiconductor field effect transistor Q1 are respectively coupled to the output terminal of the first driving circuit 51 (not shown in FIG. 3) and the ground line.

The negative pole of the secondary winding T1 of the transformer 1 is coupled to one end of the second filter inductor L2 and the second current comparator CT2. The other end of the second current comparator CT2 is coupled to the drain of the second metal oxide semiconductor field effect transistor Q2. The inductance of the second current comparator CT2 has two terminals (ie, B5 terminal and B6 terminal) coupled to the two input terminals of the second driving circuit 52 (not shown in FIG. 3). Second metal oxide semiconductor The gate and the source of the field effect transistor Q2 are respectively coupled to the output terminal of the second driving circuit 52 (not shown in FIG. 3) and the ground line. For convenience of description, the gate of the first metal oxide semiconductor field effect transistor Q1 is also referred to as an A3 terminal, and the gate of the second transistor metal oxide semiconductor field effect transistor Q2 is also referred to as a B3 terminal.

Preferably, the filter circuit 2 includes a first inductor L1, a second inductor L2, and a capacitor C1. The first inductor L1 and the capacitor C1 are connected in series between the anode of the secondary winding T1 of the transformer and the ground line, that is, one end of the first inductor L1 is coupled to the anode of the secondary winding T1 of the transformer, and the other end is coupled to the anode of the capacitor C1. The second inductor L2 is coupled to the negative pole of the secondary winding T1 of the transformer, and the other end is coupled to the first inductor L1 and the capacitor C1.

4A is a block diagram showing the structure of a driving circuit 51 according to an embodiment of the present invention. Figure 4A will be described in conjunction with Figure 3. The first driving circuit 51 includes a first charging module 511 , a first control module 512 , and a first driving module 513 .

The two input ends of the first charging module 511 are respectively coupled to the A5 terminal and the A6 terminal of the first current comparator CT1, and generate a charge for turning on the first metal oxide semiconductor field effect transistor Q1 according to the first driving current. And store the charge. The output end of the first driving module 513 is coupled to the A3 terminal of the first metal oxide semiconductor field effect transistor Q1. The first control module 512 is coupled to the first current comparator CT1, the first charging module 511, and the first driving module 513, and controls the first driving module according to the first driving current, so that when flowing through the first metal When the current of the oxide semiconductor field effect transistor Q1 flows from the ground line to the first current comparator CT1, the first driving module 513 outputs the charge stored in the first charging module 511 to the first metal oxide semiconductor field effect power. The gate of the crystal Q1, thereby turning on the first metal oxide semiconductor field effect transistor Q1; or when the current flowing through the first metal oxide semiconductor field effect transistor Q1 flows from the first current comparator CT1 to the ground line The first driving module 513 connects the gate of the first metal oxide semiconductor field effect transistor Q1 to the ground line, thereby turning off the first metal oxide semiconductor field effect transistor Q1.

4B is a block diagram showing the structure of a driving circuit 52 according to an embodiment of the invention. Figure 4B will be described in conjunction with Figure 3. The second driving circuit 52 includes a second charging module 521 , a second control module 522 , and a second driving module 523 .

The two input ends of the second charging module 521 are respectively coupled to the B5 terminal and the B6 terminal of the second current comparator CT2, and generate a charge for turning on the second metal oxide semiconductor field effect transistor Q2 according to the second driving current. And store the generated charge. The output end of the second driving module 523 is coupled to the B3 terminal of the second metal oxide semiconductor field effect transistor Q2. The second control module 522 is coupled to the second current comparator CT2, the second charging module 521, and the second driving module 523, and controls the second driving module 523 according to the second driving current, so that when flowing through the When the current of the second metal oxide semiconductor field effect transistor Q2 flows from the ground line to the second current comparator CT2, the second driving module 523 outputs the charge stored by the second charging module 521 to the second metal oxide semiconductor field. The gate of the effect transistor Q2, which in turn causes the second metal oxide semiconductor field effect transistor Q2 to be turned on; or when the current flowing through the second metal oxide semiconductor field effect transistor Q2 flows from the second current comparator CT2 to the ground In the case of the line, the second driving module 523 connects the gate of the second metal oxide semiconductor field effect transistor Q2 to the ground line, thereby turning off the second metal oxide semiconductor field effect transistor Q2.

FIG. 5 is a circuit configuration diagram of a driving circuit 52 according to still another embodiment of the present invention. Fig. 5 will be explained in conjunction with Figs. 2 to 4. As shown in FIG. 5, the circuit of the second driving module 523 is a push-pull circuit, and includes a transistor Q102, a transistor Q103, a resistor R104, and a resistor R105. The second control module 522 includes a transistor Q101 and a rectifying diode D102. The second charging module 521 includes a rectifying diode D104, a capacitor C101, a resistor R102, a rectifying diode D103, a rectifying diode D101, and a resistor R101.

Specifically, the B5 terminal of the inductor of the second current comparator CT2 is coupled to the base of the transistor Q103 and the collector of the transistor Q101, and is coupled to the second current ratio through the resistor R101 and the rectifying diode D101. The B6 terminal of the inductor of the current transformer CT2, wherein the cathode of the rectifier diode D101 is coupled to the B6 terminal. The B6 terminal is also coupled to the base of the transistor Q102 through the resistor R102 and the rectifying diode D103. The anode of the rectifying diode D103 is coupled to the resistor R102. The emitter of the transistor Q102 is coupled to the emitter of the transistor Q103, and is also coupled to the gate B3 terminal of the second metal oxide semiconductor field effect transistor Q2 via a resistor R105. The B3 terminal is also coupled to the ground line through a resistor R104. The collector of transistor Q103 is coupled to the ground line and the emitter of transistor Q101, and also to the resistor R101 is connected to the node of the rectifier diode D101. A rectifying diode D102 is connected in parallel to both ends of the resistor R102. The anode of the rectifier diode D103 is coupled to the anode of the rectifier diode D102, and the cathode of the rectifier diode D103 is coupled to the collector of the transistor Q102 through the rectifier diode D104, wherein the anode of the rectifier diode D104 It is coupled to the collector of the transistor Q102. The cathode of the rectifier diode D104 is also coupled to the ground line through the capacitor C101.

The working principle of the driving circuit 52 provided by the embodiment of the present invention is as follows. As shown in FIG. 3, when the upper end of the secondary winding T1 of the transformer is a positive pole and the lower end is a negative pole, current flows from the grounding line to the second metal oxide semiconductor. Field effect transistor Q2 and second current comparator CT2. Assuming that the current flowing through the second metal oxide semiconductor field effect transistor Q2 is I ₀ , and after the second current current comparator CT2 induces the current I ₀ , a second driving current I ₁ corresponding to the current I ₀ is generated. The direction of the two drive current I ₁ is as indicated by the arrow in FIG.

5, the second driving current I ₁ from the ratio of current flowing in the second current terminal CT2, B5, B6 flows from the terminal, and therefore a positive electrode terminal B5, B6 is a negative terminal. In this case, since the base of the transistor Q103 is coupled to the B5 terminal as the positive electrode, the transistor Q103 is turned off; since the base of the transistor Q101 is coupled to the B6 terminal as the negative electrode, the transistor Q101 is also turned off; Since the base of the transistor Q102 is coupled to the B5 terminal as the positive electrode, the emitter of the transistor Q102 is coupled to the ground line through the resistor R105 and the resistor R104, so that the transistor Q102 is turned on; at this time, the capacitor C101 can pass through the transistor Q102. And the resistor R105 discharges to the gate B3 terminal of the second metal oxide semiconductor field effect transistor Q2, thereby turning on the second metal oxide semiconductor field effect transistor Q2.

When the upper end of the secondary winding T1 of the transformer is a negative pole and the lower end is a positive pole, current flows from the first MOSFET Q1 to the first current comparator CT1. If it is assumed that the current flowing through the second metal oxide semiconductor field effect transistor Q2 is I ₀ , and after the second current current comparator CT2 senses the current I ₀ , a second driving current I ₁ corresponding to the current I ₀ is generated. Second driving current I ₁ from the ratio of current flowing in the second current terminal CT2, B6, B5 from flowing terminal, a positive electrode terminal so B6, B5 is a negative terminal. In this case, since the base of the transistor Q101 is coupled to the B6 terminal as the positive electrode, the emitter of the transistor Q101 is coupled to the ground line, so that the transistor Q101 is turned on; the collector of the transistor Q103 is transmitted through the resistor R105 and the resistor. R104 is coupled to the ground line, and the base of the transistor Q103 is coupled to the B5 terminal as the negative electrode, so the transistor Q103 is turned on, and the transistor Q102 is turned off; at this time, the output terminal B3 of the second driving circuit 52 is the second metal. The gate of the oxide semiconductor field effect transistor Q2 is grounded through the resistor R104, and the capacitor C101 is charged.

The structure and working principle of the first driving circuit 51 are the same as those of the second driving circuit 52, and are not described herein.

The high frequency electronic switch in this embodiment may include: a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) having excellent high-frequency characteristics, and a vertical double-diffused metal oxide semiconductor field effect transistor. (Vertical Double-Diffused Metal-Oxide-Semiconductor, VDMOS), Insulated Gate Bipolar Transistor (IGBT), Power Transistor (GTR), MOS Controlled Thyristor (MCT) ), Integrated Gate Commutated Thyristor (IGCT), Insulated Gate Epitaxial-Growth Transistor (IGET), Insulate-Gate Homogeneous Transistor (Insulate-Gate Homogeneous Transistor, IGHT) and other power electronic components such as Gate Turn-Off Thyristor (GTO).

FIG. 6 is a flow chart 600 showing a rectification method according to an embodiment of the invention. Figure 6 will be described in conjunction with Figures 2 through 5. As shown in FIG. 6, the embodiment of the present invention includes the following steps:

In step 602, the first detection circuit senses a current flowing through the first high frequency electronic switch to generate a first drive current.

In step 604, the first driving circuit controls the switching state of the first high frequency electronic switch according to the first driving current. Specifically, the first charging module in the first driving circuit generates a charge that turns on the first high-frequency electronic switch according to the first driving current, and stores the electric charge; the first control module in the first driving circuit is according to the first Driving current controls the first driving module in the first driving circuit, when the current flowing through the first high frequency electronic switch is from the ground line When flowing to the first detecting circuit, the first driving module outputs the charge stored by the first charging module to the gate of the first high frequency electronic switch, thereby turning on the first high frequency electronic switch; when flowing through the first high frequency When the current of the electronic switch flows from the first detecting circuit to the grounding line, the first driving module couples the gate of the first high-frequency electronic switch to the grounding line, thereby turning off the first high-frequency electronic switch.

In step 606, the second detection circuit senses a current flowing through the second high frequency electronic switch to generate a second drive current.

In step 608, the second driving circuit controls the switching state of the second high frequency electronic switch according to the second driving current. Specifically, the second charging module in the second driving circuit generates a charge that turns on the second high-frequency electronic switch according to the second driving current, and stores the electric charge; and the second control module in the second driving circuit is according to the second The driving current controls the second driving module in the second driving circuit. When the current flowing through the second high-frequency electronic switch flows from the ground line to the second detecting circuit, the second driving module stores the electric charge stored in the second charging module. Outputting to the gate of the second high frequency electronic switch, thereby turning on the second high frequency electronic switch; when the current flowing through the second high frequency electronic switch flows from the second detecting circuit to the ground line, the second driving module will be The gate of the two high frequency electronic switch is coupled to the ground line, thereby turning off the second high frequency electronic switch.

It can be understood by those skilled in the art that the above steps 602 to 608 are not strictly time-limited. For example, step 606 and step 608 may be performed first, and then steps 602 and 604 may be performed. The invention is not limited thereto.

The rectifying circuit and the rectifying method provided by the embodiments of the present invention are applicable to a full bridge circuit, a half bridge circuit, a push-pull circuit, a forward circuit, etc., and have wide applicability, but the invention is not limited thereto.

The above detailed description and the accompanying drawings are only typical embodiments of the invention. It is apparent that various additions, modifications and substitutions are possible without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood by those of ordinary skill in the art that the present invention may be applied in the form of the form, structure, arrangement, ratio, material, element, element, and other aspects in the actual application without departing from the invention. Changed. Therefore, the embodiments disclosed herein are for illustration and not limitation only. The scope of the present invention is defined by the scope of the appended claims and their legal equivalents, and is not limited by the foregoing description.

1‧‧‧Transformer

2‧‧‧Filter circuit

31‧‧‧First detection circuit

32‧‧‧Second detection circuit

41‧‧‧First high frequency electronic switch

42‧‧‧Second high frequency electronic switch

51‧‧‧First drive circuit

52‧‧‧Second drive circuit

200‧‧‧Rectifier circuit

Claims (23)

A rectifier circuit includes: a first detection circuit coupled to one end of a primary winding of a transformer; a first high frequency electronic switch coupled between the first detection circuit and a ground line; a detection circuit coupled to the other end of the secondary winding; a second high frequency electronic switch coupled between the second detection circuit and the ground line; a first drive circuit coupled to the first detection And the first high frequency electronic switch controls the first high frequency electronic switch according to the first driving circuit generated by the first detecting circuit based on a current flowing through the first high frequency electronic switch; a second driving circuit coupled to the second detecting circuit and the second high frequency electronic switch, and controlling, according to the second detecting circuit, a second driving current generated based on a current flowing through the second high frequency electronic switch The second high frequency electronic switch. The rectifying circuit of claim 1, wherein the first driving circuit comprises: a first charging module coupled to the first detecting circuit, and generating the first high frequency electronic according to the first driving current a first charge is coupled to the first high frequency electronic switch; and a first control module coupled to the first detection circuit, the first charge The module and the first driving module control the first driving module according to the first driving current. The rectifier circuit of claim 2, wherein when the current flowing through the first high frequency electronic switch flows from the ground line to the first detecting circuit, The first driving module outputs the charge stored by the first charging module to a gate of the first high frequency electronic switch, thereby turning on the first high frequency electronic switch. The rectifying circuit of claim 2, wherein when the current flowing through the first high frequency electronic switch flows from the first detecting circuit to the ground line, the first driving module is configured to the first high frequency A gate of the electronic switch is connected to the ground line, thereby turning off the first high frequency electronic switch. The rectifying circuit of claim 1, wherein the first detecting circuit comprises a first current comparator, and two ends of an inductor of the first current comparator are respectively coupled to the first driving circuit Two inputs. The rectifier circuit of claim 5, wherein a first pole of the first high frequency electronic switch is coupled to the first current comparator, and a gate of the first high frequency electronic switch is coupled to the An output of the first drive circuit. The rectifying circuit of claim 1, wherein the second driving circuit comprises: a second charging module coupled to the second detecting circuit, and generating the second high frequency electronic according to the second driving current a charge that is turned on by the switch and stores the charge; a second drive module coupled to the second high frequency electronic switch; and a second control module coupled to the second detection circuit, the second charge The module and the second driving module control the second driving module according to the second driving current. The rectifying circuit of claim 7, wherein the second driving module applies the second charging mode when the current flowing through the second high frequency electronic switch flows from the ground line to the second detecting circuit The stored charge of the group is output to a gate of the second high frequency electronic switch, thereby causing the second high frequency electronic switch to be guided through. The rectifier circuit of claim 7, wherein when the current flowing through the second high frequency electronic switch flows from the second detecting circuit to the ground line, the second driving module applies the second high frequency A gate of the electronic switch is connected to the ground line, thereby turning off the second high frequency electronic switch. The rectifying circuit of claim 1, wherein the second detecting circuit comprises a second current comparator, wherein two ends of an inductor of the second current comparator are respectively coupled to the second driving circuit Two inputs. The rectifier circuit of claim 10, wherein a drain of the second high frequency electronic switch is coupled to the second current comparator, and a gate of the second high frequency electronic switch is coupled to the gate An output of the second drive circuit. The rectifier circuit of claim 1, further comprising a filter circuit coupled to both ends of the secondary winding and the ground line. The rectifier circuit of claim 12, wherein the filter circuit comprises a first inductor, a second inductor and a capacitor, wherein the first inductor is coupled to the secondary winding and the capacitor, the capacitor coupling Connected to the ground line, the second inductor is coupled to the first inductor and the secondary winding. The rectifier circuit of claim 13, wherein the first inductor and the capacitor are coupled in series between a positive pole of the secondary winding and the ground line. The rectifying circuit of claim 13 , wherein one end of the second inductor is coupled to a negative pole of the secondary winding, and the other end is coupled to the first inductor and the capacitor. The rectifier circuit of claim 1, wherein the first high frequency electronic switch and the second high frequency electronic switch comprise any one of the following semiconductor elements: a metal oxide semiconductor tube, a vertical double diffusion metal - Oxide semiconductor field effect transistor, an insulated gate bipolar transistor, a power transistor, a A MOS controlled transistor, an integrated gate commutated transistor, an insulated gate epitaxial grown transistor, an insulated gate homomorphic transistor, and a gate turn-off transistor. A rectifying method includes: a first detecting circuit inducing a current flowing through a first high frequency electronic switch, generating a first driving current according to the current; and a first driving circuit controlling the first according to the first driving current a high frequency electronic switch; a second detecting circuit inducing a current flowing through a second high frequency electronic switch, generating a second driving current according to the current; and a second driving circuit controlling the second according to the second driving current High frequency electronic switch. The rectifying method of claim 17, wherein the step of controlling the first high frequency electronic switch according to the first driving current comprises: a first charging module in the first driving circuit is based on The first driving current generates a charge that turns on the first high frequency electronic switch, and stores the electric charge; and a first control module in the first driving circuit controls the first driving circuit according to the first driving current A first drive module in the middle. The rectifying method of claim 18, wherein the first driving module applies the first charging mode when the current flowing through the first high frequency electronic switch flows from a ground line to the first detecting circuit The charge stored in the group is output to a gate of the first high frequency electronic switch, thereby turning on the first high frequency electronic switch. For example, the rectification method of claim 18, wherein when flowing through the first When the current of the high-frequency electronic switch flows from the first detecting circuit to a grounding line, the first driving module connects a gate of the first high-frequency electronic switch to the grounding line, thereby making the first high frequency The electronic switch is turned off. The rectifying method of claim 17, wherein the step of controlling the second high frequency electronic switch according to the second driving current comprises: a second charging module of the second driving circuit is The second driving current generates a charge that turns on the second high frequency electronic switch and stores the electric charge; and a second control module in the second driving circuit controls the second driving circuit according to the second driving current a second drive module. The rectifying circuit method of claim 21, wherein when the current flowing through the second high frequency electronic switch flows from a ground line to the second detecting circuit, the second driving module charges the second The charge stored in the module is output to a gate of the second high frequency electronic switch, thereby turning on the second high frequency electronic switch. The rectifying method of claim 21, wherein the second driving module applies the second high frequency when the current flowing through the second high frequency electronic switch flows from the second detecting circuit to a ground line A gate of the electronic switch is connected to the ground line, thereby turning off the second high frequency electronic switch.