TWI408375B - Current measuring device and computer system utilizing the same - Google Patents

Abstract

A current measuring device measuring an amount of current passing through a first loading unit is disclosed. The current measuring device includes a first impedance unit, a first detection unit, and a processing unit. The first impedance unit includes a first input terminal receiving an input voltage and a first output terminal coupled to the first loading unit in a first node. The first detection unit generates a first detection signal according to the input voltage and the voltage of the first node. The processing unit processes the first detection signal to obtain the amount of the current passing through the first loading unit.

Description

Current measuring device and computer system

The present invention relates to a computer system, and more particularly to a computer system that can measure the amount of current in a load device.

In existing current measurement techniques, an galvanometer or current meter is typically used to measure the amount of current flowing through a load cell. When using current counting, the galvanometer needs to be connected in series with the load cell. The galvanometer informs the amount of current flowing through the load cell based on the amount of current flowing through itself. If the current is used to measure the current, the current checklist should be placed around the load cell. The current checklist pushes out the amount of current flowing through the object to be tested based on the sensed current magnetic field.

However, whether it is the current meter or the current meter to measure the current, it is necessary to change the original connection relationship of the load unit. In the conventional practice, the load unit is first removed, and the load unit is connected to a current measuring device (current meter or current meter). After the measurement, the connection between the load unit and the current measuring device is removed, and the connection relationship between the load unit and other components is restored. Therefore, the current measurement time will be greatly increased.

In addition, during the process of removing or recovering the load unit, it is very likely that the load unit forms an abnormal connection relationship with other components, such as an abnormal short or open. Therefore, the tester needs to spend more time debugging the load unit.

The invention provides a current measuring device for measuring the amount of current flowing through a first load unit. The current measuring device includes a first impedance unit, a first detecting unit and a processing unit. The first impedance unit has a first input end and a first output end. The first input receives an input voltage. The first output end is coupled to the first load unit to a first node. The first detecting unit generates a first detection signal according to the input voltage and the voltage of the first node. The processing unit processes the first detection signal to know the amount of current flowing through the first load unit.

The invention further provides a computer system comprising a first load device and a current measuring device. The first load device has a first load unit. The current measuring device measures the amount of current flowing through the first load unit, and includes a first impedance unit, a first detecting unit, and a processing unit. The first impedance unit has a first input end and a first output end. The first input receives an input voltage. The first output end is coupled to the first load unit to a first node. The first detecting unit generates a first detection signal according to the input voltage and the voltage of the first node. The processing unit processes the first detection signal to know the amount of current flowing through the first load device.

In order to make the features and advantages of the present invention more comprehensible, the preferred embodiments are described below, and are described in detail with reference to the accompanying drawings.

Figure 1 is a schematic illustration of a computer system of the present invention. As shown, computer system 100 includes load device 110, current measurement device 130, and processing device 150. The load device 110 has a load unit 111. The current measuring device 130 is configured to measure the amount of current flowing through the load unit 111 and transmit the measured result to the processing device 150. The processing device 150 performs a specific action based on the measurement result of the current measuring device 130. Specific actions will be described in detail later.

In the present embodiment, the current measuring device 130 transmits the measurement signal to the load device 110 through the transmission interface 171, and then transmits the measurement result to the processing device 150 through the transmission interface 191. The invention does not limit the types of transmission interfaces 171 and 191. The transmission interfaces 171 and 191 can be a Universal Serial Bus (USB) interface, an Inter-Integrated Circuit Bus (I2C Bus) interface, or other bus interface. In a possible embodiment, the transmission interfaces 171 and 191 can be different kinds of transmission interfaces.

In the present embodiment, the load device 110 transmits signals to the processing device 150 through the transmission interfaces 172, 192 and the current measuring device 130, wherein the transmitted signals are independent of the measurement signals. In other embodiments, the load device 110 can directly transmit data to the processing device 150 through a single transmission interface (not through the current measurement device 130).

The invention does not limit the types of transmission interfaces 172 and 192. In a possible embodiment, the transmission interfaces 172 and 192 are both Peripheral Component Interconnect (PCI) interfaces, but are not intended to limit the present invention. In other possible embodiments, the transmission interfaces 172 and 192 can be the same or different interfaces.

As shown, current measuring device 130 and load device 110 are each independent of a different circuit board. In a possible embodiment, the current measuring device 130 can be integrated into the load device 110, that is, the current measuring device 130 and the load device 110 are disposed on the same circuit board. In other embodiments, the load device 110, the current measurement device 130, and the processing device 150 are disposed on the same circuit board.

The invention does not limit the type of load device 110. In a possible embodiment, the load device 110 is a Video Graphics Array (VGA) or other peripheral device. Taking a display card as an example, a display card generally has many components, each of which can function as the load unit 111. In this embodiment, the load unit 111 can be a graphics processing unit (GPU) or/and a memory of the display card. Since the display card is well known to those skilled in the art, the operation principle of the display card will not be described again.

The processing device 150 performs a specific action based on the measurement result of the current measuring device 130, such as displaying the amount of current flowing through the load unit 111, or adjusting the operating frequency of the load device 110 or the load unit 111, and the like. The invention does not limit the type of processing device 150. In one possible embodiment, the processing device 150 is a motherboard (MB). In its embodiment, processing device 150 is an external instrument.

It is assumed that when the load device 110 is a display card and the processing device 150 is a motherboard, the display card and the motherboard can transmit signals to each other through a transmission interface (such as a PCI interface) 172, 192 and a current measuring device 130. Therefore, the motherboard can process the output signal of the display card or provide a signal to the display card.

At this time, if it is necessary to measure the current amount of a certain load cell in the display card, the current measuring device 130 transmits the measurement signal to the load unit through the transmission interface 171, and obtains the measurement result according to the return result of the load unit. The current measuring device 130 transmits the measurement result to the motherboard through the transmission interface 191. The motherboard can perform a specific action based on the current measurement, such as adjusting the operating frequency of the load cell or presenting the measurement on the screen.

In this embodiment, the processing device 150 receives measurement signals and signals independent of current measurement through different transmission interfaces (such as USB and PCI), but is not intended to limit the present invention. In other embodiments, the processing device 150 can transmit a measurement signal and a signal unrelated to the current measurement through a single transmission interface.

In addition, as shown in FIG. 1, the load device 110 receives the input voltage V _IN1 , and the current measuring device 130 receives the input voltage V _IN2 and is coupled to the load unit 111 at a node (not shown). The input voltage V _IN1 and the input voltage V _IN2 may be from the same or different voltage sources. Additionally, the input voltage V _IN1 and the input voltage V _IN2 may have the same or different levels. In the measurement mode, the load unit 111 stops receiving the input voltage V _IN1 . When not in the measurement mode, the load unit 111 operates in accordance with the input voltage V _IN1 .

Figure 2 is a possible embodiment of a current measuring device 130 of the present invention. As shown, the current measuring device 130 receives the input voltage V _IN2 and is coupled to the load unit 111 to the node ND. In the embodiment, the current measuring device 130 has an impedance unit 210, a detecting unit 230, and a processing unit 250.

One end of the impedance unit 210 receives the input voltage V _IN2 , and the other end of the impedance unit 210 is coupled to the load unit 110 to the node ND. In the present embodiment, the impedance unit 210 is a resistor. The detecting unit 230 generates the detection signal S _DEC according to the input voltage V _IN2 and the voltage of the node ND. The processing unit 250 knows the amount of current flowing through the load unit 111 based on the detection signal S _DEC . In this embodiment, the detection signal S _DEC is a voltage level.

In order to know the amount of current flowing through the load unit 111, the processing unit 250 has a voltage to current conversion function. After the processing unit 250 converts the detection signal S _DEC from the voltage level to the current level, the amount of current flowing through the load unit 111 can be known by the converted result.

FIG. 3A is a possible embodiment of the detecting unit 230. As shown, the detection unit 230 has a differential amplifier 310. The differential amplifier 310 generates a differential pressure signal based on a voltage difference between the input voltage V _IN2 and the voltage V _{ND of the} node ND. In the present embodiment, the differential pressure signal generated by the differential amplifier 310 is the detection signal S _DEC .

Since the differential pressure signal generated by the differential amplifier 310 is an analog signal, in another possible embodiment, the processing unit 250 shown in FIG. 2 needs to have an analog to digital conversion function. When the differential pressure signal (analog signal) generated by the differential amplifier 310 is transmitted to the processing unit 250, the processing unit 250 converts the received differential pressure signal from an analog format to a current level of the digital format. In the present embodiment, the current level generated by the processing unit 250 is the amount of current flowing through the load unit 111.

FIG. 3B is another possible embodiment of the detecting unit 230. FIG. 3B is similar to FIG. 3A except that the detecting unit 230 of FIG. 3B has an analog-to-digital converter (ADC) 330. The analog-to-digital converter 330 converts the differential pressure signal generated by the differential amplifier 310, and transmits the converted result to the processing unit 250 shown in FIG.

In this embodiment, the differential pressure signal converted by the analog-to-digital converter 330 is the detection signal S _DEC . Since the processing unit 250 shown in FIG. 2 has the function of voltage-converting current, when the processing unit 250 receives the output signal of the analog-to-digital converter 330, a corresponding current level can be generated, wherein the current level is generated. That is, the amount of current flowing through the load device 110.

In addition, in FIG. 2, the current measuring device 130 further has a switch 270 for selectively transmitting the voltage V _{ND of the} node _ND to the detecting unit 230. In the measurement mode, the switch 270 is turned on, so that the voltage V _{ND of the} node ND can be transmitted to the detecting unit 230. When not in the measurement mode, the switch 270 is not turned on. Therefore, the voltage V _{ND of the} node ND is not transmitted to the detecting unit 230. In one possible embodiment, it is not in the measurement mode, the load unit 111 may be provided for receiving an input voltage V _IN1, and the operation of the input voltage V _IN1.

FIG. 4 is a possible embodiment of a processing device 150. As shown, the processing device 150 includes a control unit 410, a temperature measuring unit 430, a storage unit 450, and a display circuit 470, but is not intended to limit the present invention. In other embodiments, some or all of the components of processing device 150 may be integrated into current measuring device 130 or load device 110. Additionally, other components may be integrated into the processing device 150 depending on the type of particular action that the processing device 150 needs to perform.

The control unit 410 performs a specific action based on the signal of the transmission interface 191 (ie, the measurement result of the current measuring device 130). In the present embodiment, the specific action performed by the control unit 410 drives the display circuit 470 such that a display panel can display the amount of current flowing through the load unit 111. In other embodiments, the display circuit 470 may be omitted if the amount of current of the load unit 111 is not required to be displayed.

In another possible embodiment, the control unit 410 can receive the measurement result of the current measuring device 130 through an Inter-Integrated Circuit Bus (I2C Bus) or a USB bus. That is to say, the transmission interface 191 is an integrated circuit bus (I2C Bus) or a USB bus.

When the transmission interface 191 is a circuit integrated circuit bus, the current measuring device 130 needs to have an internal circuit (I2C) for converting the detection signal S _DEC into a clock signal and a data signal, and then converting The subsequent result is transmitted to the control unit 410 through the transmission interface 191.

In another possible embodiment, the specific action performed by the control unit 410 adjusts the operating frequency of the load device 110 or the load unit 111 according to the measurement result of the current measuring device 130. For example, if the amount of current flowing through the load unit 111 is less than a predetermined value, the control unit 410 gradually increases the operating frequency of the load unit 111. Conversely, if the amount of current flowing through the load unit 111 is greater than the preset value, the control unit 410 gradually reduces the operating frequency of the load unit 111.

In other possible embodiments, the load unit 111 may have a first load and a second load. The first load is in parallel with the second load, wherein the first load has a first operating frequency and the second load has a second operating frequency. In this example, the specific action performed by the control unit 410 may be to adjust at least one of the first and second operating frequencies.

First, the current measuring device 130 measures the load unit 111 for obtaining a first measurement result. Then, after adjusting at least one of the first and second operating frequencies, the current measuring device 130 measures the load unit 111 again to obtain a second measurement result. The control unit 410 can respectively determine the first current amount flowing through the first load and the second current amount flowing through the second load according to the first and second measurement results.

For example, the first measurement result CUR_total is as follows:

CUR_total=I _L1 +I _L2 ..............................(1)

Wherein, I _L1 is a first current amount flowing through the first load, and I _L2 is a second current amount flowing through the first load.

Assuming that the first operating frequency of the first load is reduced by 20%, the second measurement result CUR_total' is as follows:

CUR_total'=0.8I _L1 +I _L2 ..............................(2)

Since the first and second measurement results are known, according to equations (1) and (2), the first current amount I _L1 flowing through the first load and the second current amount flowing through the second load can be respectively determined. I _L2 .

In this embodiment, only the first operating frequency of the first load is throttled down. In other embodiments, the first and/or second operating frequencies of the first and/or second load may be adjusted down/regulated. The invention does not limit the magnitude of the adjustment. In a possible embodiment, the first operating frequency is adjusted to have an amplitude equal to or not equal to the amplitude at which the first operating frequency is adjusted. For example, the first operating frequency may be reduced by 20%, while the second operating frequency may be increased by 10% or reduced by 10%, 20%, or 30%.

In addition, the operation of the load unit 111 can be monitored using a watch dog. If the load unit 111 cannot operate normally due to the adjusted operating frequency (such as a crash), the computer system 100 is restarted. After restarting, the control unit 410 may adjust the operating frequency of the load unit 111 again, or change other functions of the load device 110. In the present embodiment, the related soft system of the watchdog is stored in the storage unit 450, but is not intended to limit the present invention.

In other possible embodiments, the storage unit 450 can store test software of other test load devices 110. The control unit 410 loads the data stored in the storage unit 450 and tests the performance of the load device 110 or the load unit 111. In a possible embodiment, the results of the test can be presented in a display panel. In addition, the storage unit 450 can also store the measurement result of the current measuring device 130.

In the embodiment, the processing device 150 further includes a temperature measuring unit 430. In a possible embodiment, the temperature measuring unit 430 is a thermo diode for measuring the ambient temperature of the load device 110, the load unit 111, or the computer system 100. The measured temperature results can be displayed in a display panel. Therefore, the user can know the correlation between the amount of current flowing through the load unit 111 and the temperature. The present invention does not limit the set position of the temperature measuring unit 430. In other possible embodiments, the temperature measuring unit 430 can be integrated into the load device 110 or the current measuring device 130.

In another possible embodiment, the storage unit 450, the temperature measuring unit 430, and the display circuit 470 within the processing device 150 are not necessary. The components within processing device 150 are selectively designed in accordance with the particular actions performed by control unit 410.

In addition, the storage unit 450, the temperature measuring unit 430, and the display circuit 470 are not necessarily designed to be within the processing device 150. In other embodiments, the storage unit 450, the temperature measuring unit 430, or/and the display circuit 470 can be selectively designed in the load device 110 or the current measuring device 130.

Figure 5A is another possible embodiment of the current measuring device of the present invention. In the present embodiment, the current measuring device 530 can measure the amount of current of the load units 111 and 112, wherein the load unit 112 can be an element of another load device or another component of the load device 110.

In the present embodiment, the impedance units 531a and 531b are composed of resistors R1 and R2, respectively. In a possible embodiment, the impedance of the resistor R1 is greater than, less than or equal to the impedance of the resistor R2. Since the principle of operation of Fig. 5A is the same as that of Fig. 2, it will not be described.

In the measurement mode, switches 537a and 537b transmit the voltages of nodes ND1 and ND2 to detection units 533a and 533b, respectively. In the non-measurement mode, switches 537a and 537b stop transmitting voltages of nodes ND1 and ND2. At this time, the load units 111 and 112 may receive the input voltage V _IN1 . In another possible embodiment, load units 111 and 112 receive different input voltages.

Figure 5B is another possible embodiment of the current measuring device of the present invention. Fig. 5B is similar to Fig. 5A except that Fig. 5B has a switching unit 539. The switching unit 539 selectively transmits the detection signals S _DEC1 and S _DEC2 to the processing unit 535 according to the control signals S _C1 and S _C2 generated by the processing unit 535. In a possible embodiment, the processing unit 535 can output the processed result by using a USB or an I2C bus.

In one possible embodiment, processing unit 535 is a micro-controller with many conversion functions. For example, the processing unit 535 not only can convert the analog signal into a function of a digital signal, but also has the function of converting the voltage level into a corresponding current level.

In another possible embodiment, processing unit 535 can be a graphics processing unit (GPU). Assuming that the load unit 111 is a graphics processor, the graphics processor can determine the amount of current flowing through itself according to the detection signal S _DEC1 . In addition, the processing unit 535 can output control signals S _C1 and S _C2 using a general-purpose input/output (General Purpose I/O) terminal. In the present embodiment, the general-purpose input and output terminal that outputs the control signal S _C1 is referred to as the input and output terminal of the first general-purpose type. The general-purpose input and output terminal of the output control signal S _C2 is referred to as the input and output terminal of the second general-purpose type.

With the current measuring device of the present invention, the amount of current flowing through the load cell can be measured without changing the original connection relationship between the load cell and other components. Therefore, the debugging time can be greatly reduced. In addition, the amount of current flowing through the load unit is recorded by the storage device, and the amount of current flowing through the load unit is displayed through the display panel, so that the tester can better understand the performance of the load unit.

When the control unit 410 of the processing device 150 loads the data stored in the storage unit 450, the loaded data can be used to monitor the current change through the load unit for a long time. Engineering is therefore provided for analysis and an assessment of whether the load cell is abnormal. If the invention is applied to the factory side, then Before shipment, the abnormal load unit is stopped to improve the shipment yield.

In addition, the operating frequency of the load unit can be automatically adjusted by the application stored in the storage unit 450. Therefore, the load unit can operate at the optimum frequency. If the situation of the crash occurs after adjusting the operating frequency, the computer system can be automatically restarted. Therefore, engineers do not need to monitor the state of the computer system at any time, thereby improving work efficiency.

Although the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100‧‧‧ computer system

110‧‧‧Loading device

111, 112‧‧‧ load cell

150‧‧‧Processing device

130‧‧‧ Current measuring device

410‧‧‧Control unit

430‧‧‧Temperature measuring unit

450‧‧‧ storage unit

470‧‧‧ display circuit

310‧‧‧Differential Amplifier

171, 172, 191, 192‧‧ transmission interface

210, 531a, 531b‧‧‧ impedance unit

230, 533a, 533b‧‧‧ detection unit

250, 535‧ ‧ processing unit

270, 537a, 537b‧‧ ‧ switch

330‧‧‧ Analog Digital Converter

Figure 1 is a schematic illustration of a computer system of the present invention.

Figure 2 is a possible embodiment of the current measuring device of the present invention.

Figure 3A is a possible embodiment of one of the detection units.

Figure 3B is another possible embodiment of the detection unit.

Figure 4 is a possible embodiment of a processing apparatus of the present invention.

5A and 5B are other possible embodiments of the current measuring device of the present invention.

100. . . computer system

110. . . Load device

111. . . Load unit

130. . . Current measuring device

150. . . Processing device

Claims (54)

A computer system comprising: a first load device having a first load unit; and a current measuring device for measuring an amount of current flowing through the first load unit, and comprising: a first impedance unit having a a first input end and a first output end, the first input end receives an input voltage, the first output end and the first load unit are coupled to a first node; a first detecting unit is in a measurement a mode, according to the input voltage and the voltage of the first node, generating a first detection signal, in a second mode, not receiving the voltage of the first node; and a processing unit, processing the first detection a signal for knowing the amount of current flowing through the first load unit; and a processing device performing a specific action based on the amount of current flowing through the first load unit. The computer system of claim 1, further comprising: a switch coupled between the first load unit and the first impedance unit, in the first mode, transmitting the first node The voltage is supplied to the first detecting unit, and in the second mode, the voltage of the first node is stopped from being transmitted to the first detecting unit. The computer system of claim 1, further comprising a storage unit for recording the amount of current flowing through the first load unit. The computer system of claim 3, wherein the storage unit further stores a test software, and the specific action performed by the processing device is loading the test software stored in the storage unit for testing. The performance of the first load unit. For example, the computer system described in claim 1 includes one The control unit performs the specific action based on the amount of current flowing through the first load unit. The computer system of claim 5, wherein the specific action is to display the amount of current flowing through the first load unit on a display panel. The computer system of claim 5, further comprising a temperature measuring unit that displays the current measuring device and the measurement result of the temperature measuring unit on a display panel. The computer system of claim 7, wherein the temperature measuring unit is configured to measure the temperature of the first load unit. The computer system of claim 7, wherein the temperature measuring unit is a thermo diode. The computer system of claim 5, wherein the specific action adjusts an operating frequency of the first load unit according to an amount of current flowing through the first load unit. The computer system of claim 5, wherein the first load unit has a first load and a second load, the first load is parallel to the second load, and the first load is a graphics processor The second load is a memory, the graphics processor has a first operating frequency, and the memory has a second operating frequency. The computer system of claim 11, wherein the specific action is to adjust at least one of the first and second operating frequencies. The computer system of claim 12, wherein after adjusting at least one of the first and second operating frequencies, the detecting unit again generates a voltage according to the input voltage and the first node to generate a second detection signal, the processing unit processes the first and second detection signals, and obtains a first amount of current flowing through the first load and a second amount of current flowing through the second load. The computer system of claim 5, wherein the control unit receives the measurement result of the current measuring device through a universal serial bus (USB). The computer system of claim 5, wherein the control unit receives the measurement result of the current measuring device through an Inter-Integrated Circuit Bus (I2C Bus). The computer system of claim 15, wherein the current measuring device further comprises a circuit internal integrated circuit for converting the detection signal into a clock signal and a data signal. The computer system of claim 16, wherein the first load unit is a Graphic Processing Unit (GPU). The computer system of claim 17, wherein the graphics processor is the processing unit, and the graphics processor determines the amount of current flowing through itself according to the first detection signal. The computer system of claim 1, wherein the first impedance unit is a resistor. The computer system of claim 1, wherein the first load device is a display card, and the first load unit is a graphics processor or a memory. The computer system of claim 1, wherein the first detecting unit comprises: a differential amplifier, and generating a differential pressure signal according to the difference between the input voltage and the voltage of the first node. The computer system of claim 21, wherein the differential pressure signal is the first detection signal. The computer system of claim 21, wherein the first detecting unit further comprises: an analog-to-digital converter for converting the differential pressure signal. The computer system of claim 23, wherein the converted differential pressure signal is the first detection signal. The computer system of claim 1, further comprising a second load device, the second load device having a second load unit, wherein the current measuring device further comprises: a second impedance unit having a first a second input terminal and a second output terminal, the second input terminal receives the input voltage, the second output terminal and the second load unit are coupled to a second node; and a second detecting unit, according to the test The voltage and the voltage of the second node generate a second detection signal. The computer system of claim 25, wherein the processing unit knows the amount of current flowing through the second load unit according to the second detection signal. The computer system of claim 25, wherein the first load unit is a graphics processor and the second load unit is a memory. The computer system of claim 25, wherein the current measuring device further comprises: a switching unit for selectively transmitting the first and second detection signals to the processing unit, when the processing unit When a first control signal can be received, the switching unit transmits the first detection signal to the processing unit, where When the control unit enables a second control signal, the switching unit transmits the second detection signal to the processing unit. The computer system of claim 28, wherein the processing unit has a first general-purpose input and output (General Purpose I/O) terminal and a second general-purpose input and output, the first universal type The input and output ends are used for outputting the first control signal, and the input and output terminals of the second universal type are used for outputting the second control signal. The computer system of claim 1, wherein the first load unit is disposed in a first circuit board, and the current measuring device is disposed in a second circuit board, the first circuit board The second circuit board is transmitted through a Peripheral Component Interconnect (PCI) bus bar. The computer system of claim 1, wherein the first load device and the current measuring device form a display card. A current measuring device for measuring the amount of current flowing through a first load unit, the current measuring device comprising: a first impedance unit having a first input end and a first output end, the first input end receiving a Inputting a voltage, the first output end and the first load unit are coupled to a first node; a first detecting unit, in a first mode, generating a signal according to the input voltage and the voltage of the first node The first detection signal does not receive the voltage of the first node in a second mode; and a processing unit processes the first detection signal to generate a processing result and learns to flow through the first The amount of current in the load cell. The current measuring device of claim 32, further comprising a switch coupled to the first load unit and the first impedance unit Between the first mode, the voltage of the first node is transmitted to the first detecting unit, and in the second mode, the voltage of the first node is stopped to be sent to the first detecting unit. The current measuring device of claim 32, wherein the first load unit has a first load and a second load, the first load is connected in parallel with the second load, and the first load is a drawing process. The second load is a memory, the drawing processor has a first operating frequency, and the memory has a second operating frequency. The current measuring device of claim 34, wherein the first load unit is disposed in a first load device, the first load device further comprising a control device for processing results according to the processing unit And adjusting at least one of the first and second operating frequencies. The current measuring device of claim 34, further comprising a control device for adjusting at least one of the first and second operating frequencies according to the processing result. The current measuring device of claim 36, wherein after adjusting at least one of the first and second operating frequencies, the first detecting unit again according to the input voltage and the voltage of the first node, A second detection signal is generated, and the processing unit processes the first and second detection signals to determine a first current amount flowing through the first load and a second current amount flowing through the second load. The current measuring device of claim 32, further comprising: a storage unit for storing the processing result of the processing unit; and a control unit for performing a specific action according to the data stored by the storage unit. The current measuring device of claim 38, wherein the storage unit further stores a test software, and the control device tests the performance of the first load unit by storing the data stored in the storage unit. The current measuring device according to claim 39, further comprising a circuit portion integrating circuit for converting the processed result of the processing unit into a clock signal and a data signal. The current measuring device according to claim 40, wherein the control unit receives the processing result of the processing unit through a circuit-integrated circuit bus (I2C Bus). The current measuring device of claim 41, wherein the first load unit is a Graphic Processing Unit (GPU). The current measuring device of claim 42, wherein the drawing processor is the processing unit, and the drawing processor determines the amount of current flowing through itself according to the first detecting signal. The current measuring device of claim 32, wherein the first impedance unit is a resistor. The current measuring device of claim 32, wherein the first load unit is a graphics processor or a memory. The current measuring device of claim 32, wherein the first detecting unit comprises: a differential amplifier, and generating a differential pressure signal according to the difference between the input voltage and the voltage of the first node. The current measuring device of claim 46, wherein the differential pressure signal is the first detection signal. The current measuring device of claim 47, wherein the first detecting unit further comprises: an analog-to-digital converter for converting the differential pressure signal. The current measuring device of claim 48, wherein the converted differential pressure signal is the first detection signal. The current measuring device of claim 32, further comprising: a second impedance unit having a second input end and a second output end, the second input end receiving the input voltage, the second output The second load unit is coupled to a second node; and a second detecting unit generates a second detection signal according to the input voltage and the voltage of the second node. The current measuring device of claim 50, wherein the processing unit knows the amount of current flowing through the second load unit according to the second detection signal. The current measuring device according to claim 51, wherein the first load unit is a drawing processor, and the second load unit is a memory. The current measuring device of claim 51, further comprising a switching unit for selectively transmitting the first and second detecting signals to the processing unit, when the processing unit enables a first control During the signal, the switching unit transmits the first detection signal to the processing unit, and when the processing unit enables a second control signal, the switching unit transmits the second detection signal to the processing unit. The current measuring device of claim 53, wherein the processing unit has a first universal type of input and output (General A first general-purpose input/output terminal for outputting the first control signal, and a second general-purpose input/output terminal for outputting the second control signal.