Simulation unit circuit testing device

Abstract

The utility model discloses an analog unit circuit testing device, which is provided with a load regulation rate module, a control module, a power supply module and a display module, and is characterized in that the control module controls the power supply module to supply power to the load regulation rate module; the load regulation rate module quickly disconnects or closes different switches in the load regulation rate module in a short time according to the control signal output by the control module, so that the voltage input to the analog unit circuit to be tested changes suddenly; when the switch is in a closed state, the load regulation rate module is conducted to work, the load in a working state is connected with the analog unit circuit to be tested, the analog unit circuit to be tested is connected with the display module, and the display module outputs a waveform image of a signal. The method is used for verifying whether the simulation unit circuit to be tested is abnormal and cannot work normally when the input voltage fluctuates, and verifying the dynamic characteristics of the load capacity of the simulation unit circuit to be tested, so that the stability of the performance of the simulation unit circuit to be tested is ensured.

Description

Technical Field

[0001] This utility model relates to the field of electronic circuit technology, and more specifically, to an analog unit circuit testing device. Background Technology

[0002] Analog circuits have a wide range of applications, covering many traditional fields such as communications, automotive, consumer electronics, and industrial control. In communications, analog circuits are key hubs for signal transmission and processing, ensuring high-speed and stable information delivery. In the automotive industry, analog circuits are deeply involved in the operation of electronic systems, playing a crucial role, especially in the power management systems, motor control units, and battery management systems of electric and hybrid vehicles. Therefore, testing analog circuits is essential. First, it ensures the performance and reliability of the circuits, promptly identifies design or manufacturing defects, avoids problems after products reach the market, and guarantees a good user experience. Testing analog circuits helps improve production efficiency and reduce costs; accurately detecting faulty circuits on the production line can reduce defect rates and save resources. In education, testing analog circuits helps students understand circuit characteristics and improves their practical skills.

[0003] However, existing testing equipment has some shortcomings in terms of functionality and efficiency. First, most of them are single-function, capable of only simple experimental operations, which greatly limits their application scenarios and the diversity of experiments. Second, the load switching process is relatively slow, which not only affects the continuity of experiments but also makes it difficult to verify the performance of load regulation, thereby reducing testing efficiency. Utility Model Content

[0004] To address the problems of slow switching speed of output load values ​​and low efficiency in verifying load regulation performance in existing analog unit circuit testing devices, this invention provides an analog unit circuit testing device.

[0005] To achieve the above-mentioned technical effects, the technical solution of this utility model is as follows:

[0006] A test device for an analog unit circuit includes a load regulation module, a control module, a power supply module, and a display module; wherein, the load regulation module includes at least two loads with different resistance values, one end of each load is connected to a load switch, and the other end of each load is connected to the analog unit circuit under test;

[0007] The display module is connected to the circuit of the analog unit under test;

[0008] The first output terminal of the control module is connected to the control terminal of each load switch;

[0009] The second output terminal of the control module is connected to the control terminal of the power supply module, and the first output terminal of the power supply module is connected to the power consumption terminal of the load regulation module.

[0010] This technical solution includes a load regulation module, a control module, a power supply module, and a display module. The control module controls the power supply module to supply power to the load regulation module. The load regulation module, based on the control signal output from the control module, rapidly opens or closes the load switch within the load regulation module, causing a rapid change in the load value at the power output of the analog unit circuit. Furthermore, the dynamic characteristics of the analog unit circuit's load capacity are verified by observing the amplitude of the voltage signal fluctuations and the time required for it to return to a stable state, as displayed on the display module. During the test, only one load switch is closed, while the others are opened, ensuring that only one load is connected to the analog unit circuit under test. At this time, the load in operation is connected to the analog unit circuit, and the waveform image of the voltage signal in the current analog unit circuit is output through the display module to test the response characteristics of the analog unit circuit under different loads.

[0011] As a preferred embodiment, the device further includes a power supply rejection ratio (PSRR) testing module, the control terminal of which is connected to the third output terminal of the control module; and the second output terminal of the power supply module is connected to the power consumption terminal of the PSRR testing module.

[0012] As a preferred embodiment, the power supply rejection ratio (PSRR) test module includes an AC signal source, a coupling transformer, a blocker, and a PSRR test switch; wherein:

[0013] The third output terminal of the control module is connected to the control terminal of the suppression ratio test switch; when the suppression ratio test switch is closed, the power supply suppression ratio test module is turned on.

[0014] The AC signal source is connected to the primary coil of the coupling transformer;

[0015] The second output terminal of the power module is connected to one end of the secondary coil of the coupling transformer through a blocker.

[0016] The other end of the secondary coil of the coupling transformer is connected to one end of the suppression ratio test switch, and the other end of the suppression ratio test switch is connected to the analog unit circuit under test.

[0017] As a preferred embodiment, the blocker includes a filter network consisting of at least two filter units arranged in series.

[0018] As a preferred embodiment, the filtering unit includes at least one inductor and at least one capacitor; one end of the inductor serves as the input terminal of the filtering unit, and the other end of the inductor serves as the output terminal of the filtering unit.

[0019] The other end of the inductor is electrically connected to one end of the capacitor, and the other end of the capacitor is grounded;

[0020] The input terminal of the first filter unit in the blocker is connected to the second output terminal of the power module, and the output terminal of the last filter unit in the blocker is connected to one end of the secondary coil of the coupling transformer.

[0021] As a preferred embodiment, the device further includes a line regulation testing module, the input terminal of which is connected to the fourth output terminal of the control module; and the third output terminal of the power supply module is connected to the power consumption terminal of the line regulation testing module.

[0022] As a preferred embodiment, the line regulation test module includes resistors R2, R1, and R... F Gain amplifier, buffer, capacitor and line regulation test switch; among which:

[0023] One end of the resistor R2 is connected to the third output terminal of the power module, and the other end of the resistor R2 is connected to the first input terminal of the gain amplifier.

[0024] The second input terminal of the gain amplifier is connected to one end of the resistor R1 and the resistor R F One end is connected;

[0025] The other end of the resistor R1 is grounded;

[0026] The output terminal of the gain amplifier is connected to the first input terminal of the buffer, and the resistor R F The other end is connected to one end of the capacitor;

[0027] The other end of the capacitor is grounded.

[0028] The output terminal of the buffer is connected to the second input terminal of the buffer and one end of the line regulation test switch;

[0029] The other end of the line regulation test switch is connected to the circuit of the analog unit under test.

[0030] The control terminal of the line adjustment rate test switch is connected to the fourth output terminal of the control module.

[0031] As a preferred embodiment, the gain amplifier and buffer include an amplifier.

[0032] As a preferred embodiment, the display module includes an oscilloscope and / or a waveform testing device.

[0033] As a preferred embodiment, the power module includes a DC power supply and a voltage converter, wherein the control terminal of the voltage converter is connected to the output terminal of the control module.

[0034] Compared with the prior art, the beneficial effects of this utility model's technical solution are:

[0035] This invention comprises a load regulation module, a control module, a power supply module, and a display module. The control module controls the power supply module to supply power to the load regulation module. The load regulation module rapidly opens or closes different switches within the load regulation module in a short period of time based on the control signal output by the control module, causing a sudden voltage change in the input voltage to the analog unit circuit under test (DUT). When a switch is closed, the load regulation module is operational. At any given time, only one switch in the load regulation module is closed, and only one load is in operation within the load regulation module. The operating load is connected to the DUT, which in turn is connected to the display module. The display module outputs a waveform image to verify whether the DUT will malfunction due to input voltage fluctuations, and to verify the dynamic characteristics of the DUT's load capacity, thereby ensuring the stability of the DUT's performance. Attached Figure Description

[0036] Figure 1 This diagram illustrates the architecture of the analog unit circuit testing device proposed in this embodiment of the present invention.

[0037] Figure 2 This is a circuit diagram illustrating the analog unit circuit testing device proposed in an embodiment of the present invention.

[0038] Figure 3 This diagram illustrates the bandpass performance of the signal proposed in the embodiment of this utility model in the frequency domain.

[0039] Figure 4 This is a circuit diagram showing the filtering unit proposed in an embodiment of the present invention.

[0040] 1. Load regulation module; 2. Control module; 3. Power supply module; 4. Display module; 5. Load; 6. Load switch; 7. Analog unit circuit under test; 8. Power supply rejection ratio test module; 9. AC signal source; 10. Coupling transformer; 11. Blocker; 12. Rejection ratio test switch; 13. Line regulation test module; 14. Gain amplifier; 15. Buffer; 16. Line regulation test switch; 17. Voltage converter. Detailed Implementation

[0041] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent.

[0042] To better illustrate this embodiment, some parts of the accompanying drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions;

[0043] It is understandable to those skilled in the art that some well-known details may be omitted from the accompanying drawings.

[0044] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0045] The positional relationships depicted in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent.

[0046] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, and back), these directional indicators are only used to explain the relative positional relationships and movement of the components in a specific posture (as shown in the attached figures). If the specific posture changes, the directional indicators will also change accordingly. If the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0049] Example 1

[0050] This embodiment proposes a test device for analog unit circuits, such as... Figure 1 The diagram shown is an architectural diagram of the analog unit circuit testing device proposed in this embodiment; as shown... Figure 2The diagram shown is a circuit diagram of the analog unit circuit testing device in this embodiment.

[0051] The analog unit circuit testing device proposed in this embodiment includes a load regulation module 1, a control module 2, a power supply module 3, and a display module 4; wherein, the load regulation module 1 includes at least two loads 5 with different resistance values, one end of each load 5 is connected to a load switch 6, and the other end of the load 5 is connected to the analog unit circuit 7 under test;

[0052] The display module 4 is connected to the analog unit circuit under test 7;

[0053] The first output terminal of the control module 2 is connected to the control terminal of each load switch 6;

[0054] The second output terminal of the control module 2 is connected to the control terminal of the power module 3, and the first output terminal of the power module 3 is connected to the power consumption terminal of the load regulation module 1.

[0055] For example, the resistance values ​​of load 5 in this embodiment are different from each other. When setting the resistance value, a series of resistance values ​​are taken between the maximum and minimum output load 5 resistances, based on the minimum and maximum output load 5 resistances corresponding to the maximum and minimum current values ​​that the power supply can provide.

[0056] For example, the display module 4 in this embodiment includes an oscilloscope or a waveform testing device.

[0057] For example, the power module 3 in this embodiment includes a DC power supply and a voltage converter 17. The control terminal of the voltage converter 17 is connected to the output terminal of the control module 2. The voltage converter 17 includes the SN74LVC1T45 series.

[0058] For example, the power supply module 3 is also used to convert the level of the control signal output by the control module 2 to the load regulation module 1, the power supply rejection ratio test module 8 and the line regulation test module 13 into the level adapted to the test of the corresponding module.

[0059] For example, the control module 2 in this embodiment includes an FPGA chip or a delay circuit; the FPGA chip includes the EG4S20NG88 series chip. The FPGA pins have strong versatility, and its input / output interfaces can be divided into high-performance banks (HP banks), high-range banks (HR banks), configuration banks, etc., according to the bank function. The different single-ended and differential level standards supported are matched with the interface levels of various chips according to the specific parameters of the test circuit. During the design, the signal pins of the external chip are divided according to level standards, signal rates, etc. The signal voltage connected under each bank is the same as the IO drive interface voltage of that bank; to achieve fast switching of load 5, the delay time can be shortened in the FPGA, or the time constant of the resistor and capacitor charging network can be reduced in the delay circuit; the delay circuit uses discrete components such as resistors and capacitors to form a charging circuit. The charging voltage is sent to one end of the comparator, and the other end of the comparator is connected to a standard voltage. When the level on the capacitor reaches the preset standard voltage after a period of charging, the comparator output level changes.

[0060] For example, the switch in this embodiment includes the 2SK982 series switch.

[0061] In this embodiment, a load regulation module 1, a control module 2, a power supply module 3, and a display module 4 are provided. The load 5 in the load regulation module 1 is rapidly switched according to the control signal output by the control module 2. Specifically, the control module 2 controls the power supply module 3 to supply power to the load regulation module 1. The load regulation module 1 rapidly opens or closes different switches within a short period based on the control signal output by the control module 2, causing a sudden voltage change in the input voltage to the analog unit circuit under test (DUT) 7. When a switch is closed, the load regulation module 1 is operational. At any given time, only one switch in the load regulation module 1 is closed, and only one load 5 is in operation within the load regulation module 1. The operating load 5 is connected to the DUT 7, which is connected to the display module 4. The display module 4 outputs a waveform image of the signal. Based on this waveform image, the system verifies whether the DUT 7 will malfunction due to input voltage fluctuations, and verifies the dynamic characteristics of the load capacity of the DUT 7, thereby ensuring the stability of the DUT 7's performance.

[0062] Example 2

[0063] This embodiment is an improvement on the analog unit circuit testing device proposed in Embodiment 1.

[0064] The analog unit circuit testing device proposed in this embodiment includes a load regulation module 1, a control module 2, a power supply module 3, and a display module 4; wherein, the load regulation module 1 includes at least two loads 5 with different resistance values, one end of each load 5 is connected to a load switch 6, and the other end of the load 5 is connected to the analog unit circuit 7 under test;

[0065] The display module 4 is connected to the analog unit circuit under test 7;

[0066] The first output terminal of the control module 2 is connected to the control terminal of each load switch 6;

[0067] The second output terminal of the control module 2 is connected to the control terminal of the power module 3, and the first output terminal of the power module 3 is connected to the power consumption terminal of the load regulation module 1.

[0068] Furthermore, the device also includes a power rejection ratio test module 8, the control terminal of which is connected to the third output terminal of the control module 2; the second output terminal of the power module 3 is connected to the power consumption terminal of the power rejection ratio test module 8.

[0069] In this embodiment, the power rejection ratio test module 8 is used to evaluate the noise suppression capability of the analog unit circuit when the power supply voltage fluctuates. The power rejection ratio test module 8 is used to output fluctuating voltage, so the power rejection ratio test module 8 can effectively evaluate the power rejection performance of the circuit and ensure the stability of the analog unit circuit.

[0070] Furthermore, the power supply rejection ratio test module 8 includes an AC signal source 9, a coupling transformer 10, a blocker 11, and a rejection ratio test switch 12; wherein:

[0071] The third output terminal of the control module 2 is connected to the control terminal of the suppression ratio test switch 12; when the suppression ratio test switch 12 is closed, the power supply suppression ratio test module 8 is turned on.

[0072] The AC signal source 9 is connected to the primary coil of the coupling transformer 10;

[0073] The second output terminal of the power module 3 is connected to one end of the secondary coil of the coupling transformer 10 through the blocker 11.

[0074] The other end of the secondary coil of the coupling transformer 10 is connected to one end of the suppression ratio test switch 12, and the other end of the suppression ratio test switch 12 is connected to the analog unit circuit 7 under test.

[0075] In this embodiment, the control module 2 controls the opening and closing of the suppression ratio test switch 12. When the suppression ratio test switch 12 is closed, the control module 2 controls the power supply module 3 to supply power to the AC signal source 9, so that the output power supply jumps from 80% of the rated voltage to 120% of the rated voltage. The input voltage varies within the range of 80% to 120% of the rated voltage. The AC signal source 9 inputs an AC signal to the primary coil of the coupling transformer 10. After passing through the coupling transformer 10, the AC signal is finally coupled to the power supply terminal of the analog unit circuit under test 7 through the secondary coil of the coupling transformer. The control module 2 controls the power supply module 3 to input different DC signals to the primary coil of the coupling transformer 10 through the blocker 11. After passing through the coupling transformer 10, the DC signal is output to the analog unit circuit under test 7 through its secondary coil. The analog unit circuit under test 7 is connected to the display module 4. The power supply suppression ratio is calculated based on the ripple noise of the output signal of the display module 4, the input signal and the signal collected by the display module 4. This is used to evaluate the power supply suppression capability of the analog unit circuit under different conditions, that is, the suppression effect of the analog unit circuit on the power supply voltage fluctuation, thereby ensuring the stability of the analog unit circuit.

[0076] For example, the bandpass performance of the signal in the frequency domain is shown in Figure 3. As can be seen from the figure, the transmission gain of the AC signal from the power supply end to the output end of the module is very low from low frequency to 10MHz high frequency.

[0077] Furthermore, the blocker 11 includes a filter network consisting of at least two filter units arranged in series.

[0078] Furthermore, the filtering unit includes at least one inductor and at least one capacitor; one end of the inductor serves as the input terminal of the filtering unit, and the other end of the inductor serves as the output terminal of the filtering unit.

[0079] The other end of the inductor is electrically connected to one end of the capacitor, and the other end of the capacitor is grounded;

[0080] The input terminal of the first filter unit in the blocker 11 is connected to the second output terminal of the power module 3, and the output terminal of the last filter unit in the blocker 11 is connected to the primary coil of the coupling transformer 10.

[0081] In this embodiment, the blocker 11 is used to block the AC signal output by the AC signal source 9 to prevent the AC signal from leaking from the power supply and affecting the accuracy of the test.

[0082] For example, such as Figure 4 The diagram shown is a circuit diagram of the filtering unit in this embodiment.

[0083] For example, the blocker 11 includes a passive filtering network.

[0084] As an example, when the power supply rejection ratio test module 8 is working, it uses high-quality capacitors and inductors. The power supply rejection ratio test module 8 uses software simulation to determine the structure and component parameters of the filter network. In particular, it needs to have a strong suppression effect on low-frequency signals. Therefore, it selects some capacitors and inductors with low equivalent series resistance to form the filter network, and these components have high capacitance and inductance values.

[0085] Example 3

[0086] This embodiment is an improvement on the analog unit circuit testing device proposed in Embodiment 1 or 2.

[0087] The analog unit circuit testing device proposed in this embodiment includes a load regulation module 1, a control module 2, a power supply module 3, and a display module 4; wherein, the load regulation module 1 includes at least two loads 5 with different resistance values, one end of each load 5 is connected to a load switch 6, and the other end of the load 5 is connected to the analog unit circuit 7 under test;

[0088] The display module 4 is connected to the analog unit circuit under test 7;

[0089] The first output terminal of the control module 2 is connected to the control terminal of each load switch 6;

[0090] The second output terminal of the control module 2 is connected to the control terminal of the power module 3, and the first output terminal of the power module 3 is connected to the power consumption terminal of the load regulation module 1.

[0091] Furthermore, the device also includes a line regulation test module 13, the input terminal of which is connected to the fourth output terminal of the control module 2; and the third output terminal of the power supply module 3 is connected to the power consumption terminal of the line regulation test module 13.

[0092] Furthermore, the line regulation test module 13 includes resistors R2, R1, and R... F 14. Gain amplifier; 15. Buffer; 16. Capacitor and line regulation test switch; wherein:

[0093] One end of the resistor R2 is connected to the third output terminal of the power module 3, and the other end of the resistor R2 is connected to the first input terminal of the gain amplifier 14.

[0094] The second input terminal of the gain amplifier 14 is connected to one end of the resistor R1 and the resistor R F One end is connected;

[0095] The other end of the resistor R1 is grounded;

[0096] The output terminal of the gain amplifier 14 is connected to the first input terminal of the buffer 15, and the resistor R F The other end is connected to one end of the capacitor;

[0097] The other end of the capacitor is grounded.

[0098] The output terminal of the buffer 15 is connected to the second input terminal of the buffer 15 and one end of the line regulation test switch 16;

[0099] The other end of the line adjustment rate test switch 16 is connected to the simulation unit circuit 7 under test;

[0100] The control terminal of the line adjustment rate test switch 16 is connected to the fourth output terminal of the control module 2.

[0101] In this embodiment, the line regulation module 13 uses the signal output from the control module 2 to simulate the voltage change of the power supply during the line regulation test. The control signal is amplified by the gain amplifier 14, with a gain of (R... F +R1) / R1, where R2=R F ‖R1, and then the load driving capability is improved by the buffer 15.

[0102] The capacitor can reduce the ripple of the power supply output signal, thereby improving the stability of the power supply.

[0103] Furthermore, the gain amplifier 14 and the buffer 15 include amplifiers.

[0104] For example, the amplifier in this embodiment includes the OP179 series amplifier.

[0105] The embodiments described herein are merely examples to clearly illustrate the present invention and are not intended to limit the implementation of the present invention. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An analog unit circuit testing apparatus, characterized by, The device comprises a load regulation module (1), a control module (2), a power module (3) and a display module (4); wherein the load regulation module (1) comprises at least two loads (5) with different resistance values, one end of each load (5) is connected with a load switch (6), the other end of the load (5) is connected with a to-be-tested analog unit circuit (7); The display module (4) is connected with the to-be-tested analog unit circuit (7); The first output end of the control module (2) is connected with the control end of each load switch (6); The second output end of the control module (2) is connected with the control end of the power module (3), and the first output end of the power module (3) is connected with the power consumption end of the load regulation module (1).

2. An analog unit circuit testing apparatus according to claim 1, wherein The device further comprises a power supply rejection ratio test module (8), the control end of the power supply rejection ratio test module (8) is connected with the third output end of the control module (2), and the second output end of the power module (3) is connected with the power consumption end of the power supply rejection ratio test module (8).

3. An analog unit circuit testing apparatus according to claim 2, wherein, The power supply rejection ratio test module (8) comprises an AC signal source (9), a coupling transformer (10), a blocker (11) and a rejection ratio test switch (12); wherein: The third output end of the control module (2) is connected with the control end of the rejection ratio test switch (12); when the rejection ratio test switch (12) is closed, the power supply rejection ratio test module (8) is turned on and works; The AC signal source (9) is connected with the primary coil of the coupling transformer (10); The second output end of the power module (3) is connected with one end of the secondary coil of the coupling transformer (10) through the blocker (11); The other end of the secondary coil of the coupling transformer (10) is connected with one end of the rejection ratio test switch (12), and the other end of the rejection ratio test switch (12) is connected with the to-be-tested analog unit circuit (7).

4. An analog unit circuit testing apparatus according to claim 3, wherein The blocker (11) comprises a filter network composed of at least two series-connected filter units.

5. An analog unit circuit testing apparatus according to claim 4, wherein The filter unit comprises at least one inductor and at least one capacitor; one end of the inductor serves as the input end of the filter unit, and the other end of the inductor serves as the output end of the filter unit; The other end of the inductor is electrically connected with one end of the capacitor, and the other end of the capacitor is grounded; The input end of the first filter unit in the blocker (11) is connected with the second output end of the power module (3), and the output end of the last filter unit in the blocker (11) is connected with one end of the secondary coil of the coupling transformer (10).

6. The analog unit circuit test apparatus of claim 1, wherein The device further comprises a line regulation test module (13), the input end of the line regulation test module (13) is connected with the fourth output end of the control module (2), and the third output end of the power module (3) is connected with the power consumption end of the line regulation test module (13).

7. An analog unit circuit testing apparatus according to claim 6, wherein The line regulation test module (13) comprises a resistor R2, a resistor R1, a resistor R F , a gain amplifier (14), a buffer (15), a capacitor and a line regulation test switch (16); wherein: One end of the resistor R2 is connected with the third output end of the power module (3), and the other end of the resistor R2 is connected with the first input end of the gain amplifier (14); The second input terminal of the gain amplifier (14) is connected to one end of the resistor R1 and one end of the resistor R F . The other end of the resistor R1 is grounded. The output of the gain amplifier (14) is connected to the first input of the buffer (15), to the other end of the resistor R F and to one end of the capacitor. The other end of the capacitor is grounded; The output end of the buffer (15) is connected with the second input end of the buffer (15) and one end of the line regulation test switch (16); The other end of the line regulation test switch (16) is connected with the analog unit circuit (7) to be tested; The control end of the line regulation test switch (16) is connected with the fourth output end of the control module (2).

8. An analog unit circuit testing apparatus according to claim 7, wherein, The gain amplifier (14) and the buffer (15) comprise an amplifier.

9. An analog unit circuit testing apparatus according to any one of claims 1 to 8, characterized in that, The display module (4) comprises an oscilloscope and / or a waveform test device.

10. An analog unit circuit testing apparatus according to any one of claims 1 to 8, wherein The power module (3) comprises a direct current power supply and a voltage converter (17), and the control end of the voltage converter (17) is connected with the output end of the control module (2).

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