Current detection circuit and electronic device

Abstract

The utility model relates to a current detection circuit and electronic equipment. The detection circuit comprises a control module, a signal driving module and a signal acquisition module. The signal driving module is connected with the control module and the to-be-detected product, and is used for outputting an analog signal according to the control signal of the control module and sending the analog signal to the to-be-detected product. The signal acquisition module is connected with the control module, the signal driving module and the to-be-detected product, and is used for acquiring an initial electric signal after the analog signal passes through the to-be-detected product, and amplifying the acquired initial electric signal in the signal acquisition module to obtain an amplified target electric signal; and finally, the target signal is output to the control module through the signal acquisition module, so that current detection of the to-be-detected product is realized. The current detection circuit is small in size, easy to integrate and low in hardware cost. When the current detection circuit is used for small current detection, the operation and debugging modes are very simple and convenient, and the flexibility is high.

Description

Technical Field

[0001] This application relates to the field of current detection circuit technology, and in particular to a current detection circuit and electronic device. Background Technology

[0002] The standby time of electronic devices is closely related to their standby power consumption. Generally, the lower the power consumption, the longer the standby time. Optimizing hardware and software can effectively improve standby time. During product optimization, it's necessary to measure minute signals to determine if the product meets requirements. Taking current signal measurement as an example, minute current signals can currently be acquired using standard instruments such as digital multimeters. However, standard instruments are expensive, complex to install, and lack flexibility in use. Utility Model Content

[0003] Therefore, it is necessary to provide a current detection circuit and electronic device that is flexible in use and low in cost.

[0004] In a first aspect, this application provides a current detection circuit, the detection circuit comprising:

[0005] Control module;

[0006] The signal driving module is connected to both the control module and the product under test. The signal driving module is used to output analog signals according to the control signals of the control module and send the analog signals to the product under test.

[0007] The signal acquisition module is connected to the control module, the signal driving module, and the product under test. The signal acquisition module is used to acquire the initial electrical signal after the analog signal passes through the product under test, and amplify the initial electrical signal to obtain the amplified target electrical signal, so as to output the target electrical signal to the control module to realize the current detection of the product under test.

[0008] In some embodiments, the signal acquisition module includes:

[0009] The voltage follower unit is connected to the signal drive module and the product under test, respectively, and is used to collect the initial electrical signal after the analog signal passes through the product under test;

[0010] The voltage amplification unit, connected to the voltage follower unit, is used to amplify the initial electrical signal to obtain the amplified electrical signal;

[0011] The conversion unit, connected to the voltage amplification unit, is used to convert the amplified electrical signal to obtain the target electrical signal, and then output the target electrical signal to the control module.

[0012] In some embodiments, the voltage follower unit includes an operational amplifier whose input is connected to a shielding ring.

[0013] In some embodiments, the voltage amplification unit includes an instrumentation amplifier, the gain resistor terminal of which is connected to an external resistor, and the instrumentation amplifier is used to determine the amplification gain of the instrumentation amplifier based on the resistance value of the external resistor.

[0014] In some embodiments, the signal driving module includes:

[0015] The source measurement unit is connected to the control module and is used to determine the analog signal based on the control signal from the control module.

[0016] The sampling unit, connected to the source measurement unit, is used to apply analog signals to the product to be tested.

[0017] In some embodiments, the source measurement unit includes a measurement chip, which includes a register connected to a control module for receiving control signals sent by the control module; the measurement chip is used to read the control signals in the register to determine the measurement mode of the product to be tested.

[0018] In some embodiments, the control module is connected to the source measurement unit via an SPI interface.

[0019] In some embodiments, the control module includes:

[0020] The processing unit is connected to the signal driving module and the signal acquisition module respectively. It is used to send control signals to the signal driving module so that the signal driving module generates analog signals according to the control signals; and to receive the target electrical signals sent by the signal acquisition module so as to perform data analysis based on the target electrical signals.

[0021] The storage unit, connected to the processing unit, is used to store data received or sent by the processing unit.

[0022] In some embodiments, the control module further includes a network unit connected to the processing unit, which is used to acquire product parameters corresponding to the product to be detected and send the product parameters to the processing unit so that the processing unit can determine the control signal based on the product parameters.

[0023] Secondly, this application provides an electronic device that includes the current detection circuit described in the first aspect above.

[0024] The aforementioned current detection circuit includes a control module, a signal driving module, and a signal acquisition module. The signal driving module is connected to the control module and the product under test (DUT), and outputs an analog signal based on the control signal from the control module, sending the analog signal to the DUT. The signal acquisition module is connected to the control module, the signal driving module, and the DUT, and acquires the initial electrical signal after the analog signal passes through the DUT. The acquired initial electrical signal is amplified in the signal acquisition module to obtain the amplified target electrical signal, which is then output to the control module to achieve current detection of the DUT.

[0025] The current detection circuit of this application can realize the detection of microampere-level currents by using a control module, a signal driving module, and a signal acquisition module. The circuit is small in size, easy to integrate, and has low hardware cost. The operation and debugging of small current detection using the current detection circuit of this application are very simple and highly flexible. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of a current detection circuit according to one embodiment;

[0028] Figure 2 This is a schematic diagram of the control module in one embodiment;

[0029] Figure 3 This is a schematic diagram of the structure of a signal driving module according to one embodiment;

[0030] Figure 4 This is a schematic diagram of the structure of a signal acquisition module according to one embodiment;

[0031] Figure 5 This is a schematic diagram of the current detection circuit according to another embodiment;

[0032] Figure 6 A circuit diagram of a voltage follower unit according to one embodiment;

[0033] Figure 7 This is a circuit diagram of a voltage amplification unit according to one embodiment.

[0034] Explanation of reference numerals in the attached figures:

[0035] 100. Control module; 110. Processing unit; 120. Storage unit; 130. Network unit; 200. Signal drive module; 210. Source measurement unit; 220. Sampling unit; 300. Signal acquisition module; 310. Voltage follower unit; 320. Voltage amplification unit; 330. Conversion unit; 400. Power supply module; 500. Product to be tested. Detailed Implementation

[0036] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0038] It is understood that the terms "first," "second," etc., used herein may be used to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0039] It is understood that the term "connection" in the following embodiments should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have electrical signal or data transmission with each other.

[0040] It is understandable that "at least one" refers to one or more, and "multiple" refers to two or more. "At least a part of an element" refers to part or all of an element.

[0041] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising / including” or “having,” etc., specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. Meanwhile, the term “and / or” as used in this specification includes any and all combinations of the associated listed items.

[0042] When optimizing and testing electronic devices, the current may only change by a tiny amount, on the order of µA. Therefore, in actual measurement processes, it is necessary to measure this minute current to determine whether the product meets the requirements.

[0043] like Figure 1 As shown, in some embodiments, a current detection circuit is provided. This detection circuit includes a control module 100, a signal driving module 200, a signal acquisition module 300, a power supply module 400, and a product under test 500. The signal driving module 200 is connected to both the control module 100 and the product under test 500. The control module 100 outputs a control signal, and the signal driving module 200 outputs an analog signal according to the control signal from the control module 100, and sends the analog signal to the product under test 500. The signal acquisition module 300 is connected to the control module 100, the signal driving module 200, and the product under test 500. The signal acquisition module 300 acquires the initial electrical signal after the analog signal passes through the product under test 500, amplifies the initial electrical signal to obtain an amplified target electrical signal, and then outputs the target electrical signal to the control module 100 to realize the current detection of the product under test 500.

[0044] The power supply module 400 is connected to the control module 100, the signal drive module 200, and the signal acquisition module 300, and is used to supply power to the control module 100, the signal drive module 200, and the signal acquisition module 300, providing the voltage required for each module to work.

[0045] The current detection circuit disclosed in this embodiment does not require additional standard instruments or complex module deployment when testing the product 500. It only requires integrating the control module 100, signal drive module 200, and signal acquisition module 300 onto a single circuit board, allowing for easy integration into any testing system, reducing the size of the current detection circuit and lowering its cost. Furthermore, the current detection circuit of this embodiment is simple to operate during circuit testing; the setting and analysis of test data can be directly displayed on a host computer, making it convenient to use.

[0046] In some specific embodiments, such as Figure 2As shown, the control module 100 includes a processing unit 110 and a storage unit 120. The processing unit 110 is connected to both the signal driving module 200 and the signal acquisition module 300. The processing unit 110 sends control signals to the signal driving module 200, causing the signal driving module 200 to generate analog signals based on the control signals, and then sends the generated analog signals to the product 500 under test. The control module 100 also receives target electrical signals sent by the signal acquisition module 300, performs data analysis on the target electrical signals, and determines whether the product 500 under test meets the design requirements. The storage unit 120 is connected to the processing unit 110 and is used to store the data received or sent by the processing unit 110.

[0047] In other embodiments, please continue to refer to Figure 2 The control module 100 also includes a network unit 130. The network unit 130 is connected to the processing unit 110 and is used to acquire the product parameters corresponding to the product to be tested 500 and send the product parameters to the processing unit 110 so that the processing unit 110 can determine the control signal based on the product parameters.

[0048] The product parameters correspond to the testing requirements of the product 500 under test. Based on the product parameters, a simulated signal is determined for testing the product 500. Then, the electrical signal generated when the simulated signal flows through the product 500 is acquired to determine whether the product 500 meets the requirements. In this embodiment, the product parameters of the product 500 under test can be transmitted to the processing unit 110 via network unit 130 through data communication. After receiving the product parameters of the product 500 under test, the processing unit 110 generates a control signal corresponding to the product parameters, drives the module 200 to output the simulated signal flowing through the product 500 under test through the control signal, and completes signal acquisition through the signal acquisition module 300.

[0049] In some other implementations, the control module 100 may also include a USB communication interface, which is connected to the processing unit 110, so that the processing unit 110 can also obtain the product parameters of the product to be tested 500 through the communication interface.

[0050] It is understood that this embodiment does not restrict the communication method between the processing unit 110 and the host computer, as long as the product parameters of the product to be tested 500 in the host computer can be accurately transmitted to the processing unit 110.

[0051] like Figure 3As shown, in some other embodiments, the signal driving module 200 includes a source measurement unit 210 and a sampling unit 220. The source measurement unit 210 is connected to the control module 100 and is used to determine an analog signal based on the control signal from the control module 100. The sampling unit 220 is connected to the source measurement unit 210 and is used to apply the analog signal to the product 500 to be tested through the sampling unit 220.

[0052] The signal driving module 200 determines the analog signal to be output to the product under test 500 based on the control signal output by the control module 100. The analog signal represents a test source applied to the product under test 500; it can be a current signal or a voltage signal. The analog signal is applied to the product under test 500 through the sampling unit 220 to output the analog signal flowing through the product under test 500 to the signal acquisition module 300. For example, the sampling unit 220 can be a sampling resistor.

[0053] In some specific embodiments, the source measurement unit 210 includes a measurement chip. The measurement chip includes a register connected to the control module 100 for receiving control signals sent by the control module 100. The measurement chip is used to read the control signals in the register to determine the measurement mode of the product 500 to be tested.

[0054] The measurement mode in this embodiment represents the method of current detection for the product 500 under test. Measurement modes include, for example, voltage-driven current measurement mode and current-driven voltage mode. The control module 100 can communicate with the registers of the source measurement unit 210, such as writing control signals and other data into the registers, or accessing the data stored in the registers. During operation, the source measurement unit 210 reads the value of its internal registers and determines the channel of the output analog signal, the type of the output analog signal, and the amplitude of the output analog signal based on the register value.

[0055] In some exemplary embodiments, the control module 100 is connected to the source measurement unit 210 via an SPI interface.

[0056] SPI (Serial Peripheral Interface) is a high-efficiency, flexible, and simple serial communication interface that can be used for serial communication data transmission. The control module 100 and the source measurement unit 210 are connected via the SPI interface, meaning that during data transmission, the control module 100 and the source measurement unit 210 can simultaneously receive and send data, greatly improving data transmission efficiency.

[0057] like Figure 4As shown, in some embodiments, the signal acquisition module 300 includes a voltage follower unit 310, a voltage amplification unit 320, and a conversion unit 330. The voltage follower unit 310 is connected to both the signal driving module 200 and the product under test 500, and is used to acquire the initial electrical signal after the analog signal passes through the product under test 500. The voltage amplification unit 320 is connected to the voltage follower unit 310 and is used to amplify the initial electrical signal to obtain an amplified electrical signal. The conversion unit 330 is connected to the voltage amplification unit 320 and is used to convert the amplified electrical signal to obtain a target electrical signal, which is then output to the control module 100.

[0058] The voltage follower unit 310 ensures that the input voltage and output voltage are the same. In this embodiment, the input terminal of the voltage follower unit 310 is connected to the signal driving module 200, and the output terminal is connected to the voltage amplification unit 320. The voltage at the output terminal is equal to or as equal as possible to the input terminal. The voltage follower unit 310 ensures that the analog signal flowing through the product under test 500 is output to the voltage amplification unit 320 without additional gain, maintaining the original voltage.

[0059] In some exemplary embodiments, the voltage follower unit 310 includes an operational amplifier whose input is connected to a shielding ring.

[0060] A guard ring (GrD), also known as a protection ring, is used to prevent leakage current from other parts of the circuit from flowing to the input of an operational amplifier, thus preventing a degrade in amplifier performance. Since this embodiment requires measuring currents at the microampere level, connecting the input of the operational amplifier to a guard ring ensures that the non-inverting and inverting inputs of the operational amplifier are at the same potential, unaffected by other parts of the circuit, thereby improving the accuracy of the measurement of minute currents.

[0061] The signal acquisition module 300 amplifies the initial electrical signal, such as current or voltage, flowing through the product under test 500 through the voltage amplification unit 320 to obtain the amplified electrical signal. The voltage amplification unit 320 amplifies the electrical signal flowing through the product under test 500, enabling the detection of weak currents.

[0062] In some other specific embodiments, the voltage amplification unit 320 includes an instrumentation amplifier, the gain resistor terminal of which is connected to an external resistor, and the instrumentation amplifier is used to determine the amplification gain of the instrumentation amplifier based on the resistance value of the external resistor.

[0063] The voltage amplification unit 320 in this embodiment uses an instrumentation amplifier. An instrumentation amplifier is a precision differential voltage amplifier. Its performance surpasses other types of amplifiers, offering advantages such as high common-mode rejection ratio, high input impedance, low noise, low linearity error, and low offset drift. Furthermore, the gain of the instrumentation amplifier can be set internally or by the user through internal or external resistors connected via pins, providing flexible gain settings and ease of use.

[0064] The conversion unit 330 performs analog-to-digital conversion on the amplified analog electrical signal output by the voltage amplification unit 320 to obtain the target electrical signal in digital form, and outputs it to the control module 100.

[0065] In a specific embodiment, such as Figure 5 As shown, a circuit detection circuit is provided, such as Figure 5 As shown, the circuit detection circuit includes a control module 100, a signal driving module 200, a signal acquisition module 300, a power supply module 400, and a product under test 500. The power supply module 400 is connected to the control module 100, the signal driving module 200, and the signal acquisition module 300, and is used to provide the voltage required for the operation of the above modules.

[0066] like Figure 5 The control module 100 includes a processing unit 110, a storage unit 120, and a network unit 130. The processing unit 110 is connected to both the storage unit 120 and the network unit 130. The network unit 130 may be a network chip, used to connect to a host computer, receive product parameters of the product to be tested 500 sent by the host computer, and send the received data to the processing unit 110. The storage unit 120 may be a memory, used to store data sent or received by the processing unit 110.

[0067] The signal driving module 200 includes a source measurement unit 210 and a sampling unit 220. The source measurement unit 210 is connected to both the processing unit 110 and the sampling unit 220, and is used to obtain an analog signal output to the product under test 500 based on the control signal output by the processing unit 110. The sampling unit 220 is used to apply the analog signal to the product under test 500. For example, the source measurement unit 210 may be a source measurement chip, and the sampling unit 220 may be a 10 milliohm sampling resistor.

[0068] The AD5522 chip is used as an example for this illustration. The AD5522 offers multiple programmable modes, allowing it to drive pin voltages and measure corresponding currents, as well as drive pin currents and measure corresponding voltages. In some other embodiments, the AD5522 chip can also drive and measure high impedance. In this embodiment, the source measurement unit 210 can drive or measure voltages within a 22.5V range; it can also use an internal amplifier to drive or measure currents up to ±80mA per channel, or use an external amplifier to achieve current measurements over a higher current range.

[0069] The communication mode between the source measurement chip and the control module 100 is determined by the pin connection of the source measurement chip. For example, data transmission is performed via a serial SPI interface mode, where data sent by the control module 100 is written into the registers of the source measurement chip. Alternatively, the registers of the source measurement chip can be accessed via the SPI interface.

[0070] When the voltage-driven current measurement mode is selected based on the control signal, the voltage drive is mapped to the output pin of the source measurement chip and applied to the product under test 500 via a sampling resistor. The drive output voltage can be expressed as: VOUT = 4.5 * VREF * (DAC_CODE / 216) - (3.5 * VREF * (OFFSET_DAC_CODE / 216)) + DUTGND. Here, VREF represents the reference voltage input to the source measurement chip, and DAC_CODE and OFFSET_DAC_CODE are both configuration values ​​of the source measurement chip.

[0071] When the current-driven voltage measurement mode is selected based on the control signal, the voltage of the DAC inside the source measurement chip is converted into current and mapped to the output pin of the source measurement chip. The feedback path is the current measurement amplifier, which feeds back the voltage measured across the sensing resistor. The drive output current can be expressed as: IOUT = 4.5 * VREF * ((DAC_CODE - 32768) / 216) / (RSENSE * Gain). Here, DAC_CODE and Gain are internal register configuration values, and RSENSE represents the current sensing resistor.

[0072] In some implementations, the reference voltage VREF of the source measurement chip can be converted from 12V to 5V using a voltage conversion chip. During the voltage conversion process, a capacitor can be connected to the voltage conversion chip for energy storage and filtering.

[0073] The signal acquisition module 300 includes a voltage follower unit 310, a voltage amplification unit 320, and a conversion unit 330. For example... Figure 5As shown, the voltage follower unit 310 includes two operational amplifiers. The voltage follower unit 310 ensures that the voltage supplied to the voltage amplification unit 320 is consistent with the voltage output by the product under test 500. The voltage amplification unit 320 amplifies the input electrical signal and then converts it into a digital signal through the conversion unit 330, which is then sent to the processing unit 110. The processing unit 110 determines whether the product under test 500 meets the design requirements based on the received signal.

[0074] like Figure 6 As shown, the voltage follower unit 310 is an operational amplifier. Figure 6 Taking the operational amplifier shown as an example, when sampling a small current, a shielding ring (GRD) is connected to the input terminal of the operational amplifier to make the non-inverting and inverting input terminals of the operational amplifier at the same potential. Pins 2 and 7 of this operational amplifier are protection pins, which are virtual grounded internally with the +IN input and are almost at the same potential as -IN. Taking the sampling unit 220 and the sampling resistor as an example, one end of the sampling resistor is connected to pin 1 of the first operational amplifier, and the other end is connected to pin 1 of the second operational amplifier. When routing on the circuit board, the signal line of the sampling resistor is surrounded by a GRD as an equipotential shielding protection to prevent leakage current from affecting other pins of the device. The output from pin 6 of the operational amplifier is sent to the voltage amplification unit 320.

[0075] like Figure 7 The instrumentation amplifier shown is used as an example of voltage amplification unit 320. The instrumentation amplifier amplifies the electrical signal collected and flowing through the product under test 500, enabling the detection of minute electrical signals.

[0076] Taking the AD8220 amplifier as an example of an instrumentation amplifier, the AD8220 is a JFET input single-chip instrumentation amplifier. This amplifier employs a three-op-amp topology, providing high input impedance, low bias current, low offset current, and no input bias current noise. The amplification gain can be configured using resistors. Figure 7 As shown, pin 4 of the AD8220 chip is connected to the first operational amplifier, and pin 1 is connected to the second operational amplifier, receiving the signal output from the voltage follower unit 310. Resistor R32 is connected to pins 2 and 3 to set the gain of the instrumentation amplifier; the gain formula can be expressed as: G = 1 + (49.9K / R32). Capacitors C37 and C38 are connected to pin 8 to power the AD8220 chip. Pin 7 of the instrumentation amplifier is connected to a low-pass filter formed by resistor R33 and capacitor C43, which outputs the amplified signal to the conversion unit 330 for analog-to-digital conversion.

[0077] The conversion unit 330 may include a small-signal analog-to-digital converter (ADC) that digitizes the analog electrical signal input to the voltage amplification unit 320 to obtain the target electrical signal, which is then output to the control module 100. The control module 100 records and analyzes the received target electrical signal output from the conversion unit 330, and judges and displays the corresponding test results. In some other implementations, the conversion unit 330 may also include a power converter.

[0078] The circuit described above can be applied to the design and development of wearable products such as electronic watches and fitness trackers, and can be used to determine whether the product meets the requirements by measuring and detecting weak currents.

[0079] In some other embodiments, an electronic device is proposed that includes the current detection circuit proposed in any of the above embodiments.

[0080] The electronic device for current detection according to this application has a simple structure, small size, and low cost, and can be easily integrated into any system. Operation requires no complex wiring or deployment; it only needs to be connected to the product under test. The detected data and analysis results can be directly displayed on a host computer, and debugging is simple.

[0081] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0082] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A current detection circuit, characterized in that, include: Control module; A signal driving module is connected to the control module and the product to be tested, respectively. The signal driving module is used to output an analog signal according to the control signal of the control module and send the analog signal to the product to be tested. The signal acquisition module is connected to the control module, the signal driving module and the product under test, respectively. The signal acquisition module is used to acquire the initial electrical signal after the analog signal passes through the product under test, and amplify the initial electrical signal to obtain the amplified target electrical signal, so as to output the target electrical signal to the control module to realize the current detection of the product under test.

2. The current detection circuit according to claim 1, characterized in that, The signal acquisition module includes: A voltage follower unit is connected to the signal driving module and the product under test, respectively, and is used to collect the initial electrical signal after the analog signal passes through the product under test; A voltage amplification unit, connected to the voltage follower unit, is used to amplify the initial electrical signal to obtain an amplified electrical signal; A conversion unit, connected to the voltage amplification unit, is used to convert the amplified electrical signal to obtain the target electrical signal, and output the target electrical signal to the control module.

3. The current detection circuit according to claim 2, characterized in that, The voltage follower unit includes an operational amplifier, the input of which is connected to a shielding ring.

4. The current detection circuit according to claim 2, characterized in that, The voltage amplification unit includes an instrumentation amplifier, the gain resistor terminal of which is connected to an external resistor, and the instrumentation amplifier is used to determine the amplification gain of the instrumentation amplifier based on the resistance value of the external resistor.

5. The current detection circuit according to claim 1, characterized in that, The signal driving module includes: A source measurement unit, connected to the control module, is used to determine the analog signal based on the control signal from the control module. A sampling unit, connected to the source measurement unit, is used to apply the analog signal to the product to be tested through the sampling unit.

6. The current detection circuit according to claim 5, characterized in that, The source measurement unit includes a measurement chip, which includes a register connected to the control module for receiving control signals sent by the control module. The measurement chip is used to read the control signals in the register to determine the measurement mode for the product to be tested.

7. The current detection circuit according to claim 6, characterized in that, The control module is connected to the source measurement unit via an SPI interface.

8. The current detection circuit according to claim 1, characterized in that, The control module includes: The processing unit is connected to the signal driving module and the signal acquisition module respectively, and is used to send control signals to the signal driving module so that the signal driving module generates analog signals according to the control signals; and to receive target electrical signals sent by the signal acquisition module so as to perform data analysis based on the target electrical signals; A storage unit, connected to the processing unit, is used to store data received or sent by the processing unit.

9. The current detection circuit according to claim 8, characterized in that, The control module further includes a network unit connected to the processing unit, which is used to acquire product parameters corresponding to the product to be detected and send the product parameters to the processing unit so that the processing unit can determine the control signal based on the product parameters.

10. An electronic device, characterized in that, Includes the current detection circuit according to any one of claims 1-9.

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