Narrow pulse current source and testing device
By combining switching power supply modules, buck modules, voltage regulator modules, pulse signal generation modules, and signal conditioning modules, the testing requirements of narrow pulse current sources in terms of pulse width and amplitude are solved, achieving high-precision and low-cost load testing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA SPALLATION NEUTRON SOURCE SCI CENT
- Filing Date
- 2025-04-29
- Publication Date
- 2026-05-12
AI Technical Summary
Existing narrow pulse current sources cannot meet the testing requirements of various loads in terms of pulse width and amplitude, resulting in low testing accuracy and limited selectivity.
The design employs a combination of switching power supply module, buck module, voltage regulator module, pulse signal generation module, and signal conditioning module. Through multi-stage voltage conversion and signal conditioning, it ensures that the pulse width and amplitude of the narrow pulse current source meet the load test requirements. Furthermore, it utilizes an isolated driver chip and push-pull circuit to improve signal reliability.
It enables high-precision testing of various loads, reduces the cost of narrow pulse current sources, and improves the reliability and accuracy of testing.
Smart Images
Figure CN224231833U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of current source technology, and in particular to a narrow pulse current source and testing device. Background Technology
[0002] A narrow-pulse current source is a circuit capable of outputting high-precision, rapidly rising / falling short current pulses (typically with pulse widths in the nanosecond to microsecond range). Its core characteristics are the narrow pulse duration, high amplitude accuracy, and fast dynamic response, making it widely used in scenarios requiring precise transient current driving, such as in laser and optoelectronic fields and biomedical applications.
[0003] Currently, in existing technologies, narrow pulse current sources have low testing accuracy and limited selectivity because their pulse width differs significantly from the pulse width theoretically applicable to various load testing requirements, and their amplitude does not reach the amplitude theoretically applicable to various load testing requirements. As a result, narrow pulse current sources cannot meet the testing requirements of loads. Utility Model Content
[0004] This invention provides a narrow pulse current source and testing device to achieve high-precision testing of various loads, while also achieving low-cost design.
[0005] In a first aspect, this utility model embodiment provides a narrow pulse current source, which includes: a switching power supply module, a first step-down module, a second step-down module, a first voltage regulator module, a second voltage regulator module, a pulse signal generation module, and a signal conditioning module;
[0006] The output terminal of the switching power supply module is electrically connected to the input terminal of the first voltage regulator module through the first step-down module; the output terminal of the first voltage regulator module is electrically connected to the power supply terminal of the signal conditioning module.
[0007] The output terminal of the switching power supply module is electrically connected to the input terminal of the second voltage regulator module through the first step-down module; the output terminal of the second voltage regulator module is electrically connected to the input terminal of the pulse signal generator module; the output terminal of the pulse signal generator module is electrically connected to the input terminal of the signal conditioning module; the output terminal of the signal conditioning module is electrically connected to the load under test; the output terminal of the switching power supply module is also electrically connected to the voltage regulation terminal of the signal conditioning module through the second step-down module.
[0008] The minimum allowable pulse width of the signal conditioning module is a preset pulse width; the voltage value at the voltage adjustment terminal of the signal conditioning module is greater than the maximum voltage at the input terminal of the signal conditioning module.
[0009] Optionally, the signal conditioning module includes an isolation drive unit and a power conditioning output unit;
[0010] The power supply terminal of the isolation drive unit serves as the power supply terminal of the signal conditioning module and is electrically connected to the output terminal of the first voltage regulator module.
[0011] The input terminal of the isolation drive unit serves as the input terminal of the signal conditioning module and is electrically connected to the output terminal of the pulse signal generating module.
[0012] The output terminal of the second step-down module is electrically connected to the voltage adjustment terminal of the power adjustment output unit; the voltage adjustment terminal of the power adjustment output unit serves as the voltage regulation terminal of the signal conditioning module.
[0013] The output terminal of the isolation drive unit is electrically connected to the input terminal of the power regulation output unit; the output terminal of the power regulation output unit is electrically connected to the load under test.
[0014] The minimum allowable pulse width of the isolation drive unit is a preset pulse width; the voltage value at the voltage adjustment terminal of the power regulation output unit is greater than the maximum voltage at the input terminal of the power regulation output unit.
[0015] Optionally, the isolation drive unit includes an isolation drive chip; the input voltage source of the isolation drive chip is electrically connected to the output terminal of the first voltage regulator module.
[0016] The first input terminal of the isolation driver chip is electrically connected to the output terminal of the pulse generation module;
[0017] The second input terminal of the isolation driver chip is grounded;
[0018] The output voltage source of the isolation driver chip is electrically connected to the second buck module;
[0019] The output terminal of the isolation driver chip is electrically connected to the input terminal of the power regulation output unit.
[0020] Optionally, the power regulation output unit includes a push-pull circuit; the push-pull circuit includes a first transistor and a second transistor;
[0021] The first terminal of the first transistor is electrically connected to the second step-down module; the control terminal of the first transistor is connected to the control terminal of the second transistor, and is also electrically connected to the output terminal of the isolation driver chip.
[0022] The second terminal of the first transistor is electrically connected to the first terminal of the second transistor and to the load under test; the second terminal of the second transistor is grounded.
[0023] Optionally, the push-pull circuit further includes: a first resistor, a Zener diode, and a second resistor;
[0024] The first terminal of the first resistor is electrically connected to the second terminal of the first transistor; the second terminal of the first resistor is electrically connected to the load under test; the first terminal of the Zener diode is electrically connected to the first terminal of the first resistor; the second terminal of the Zener diode is electrically connected to the first terminal of the second resistor; the second terminal of the second resistor is electrically connected to the second terminal of the first resistor.
[0025] The second end of the second resistor is also electrically connected to the clamping end of the isolation driver chip.
[0026] Optionally, the push-pull circuit further includes: a first capacitor, a second capacitor, and a third capacitor;
[0027] The first terminal of the first capacitor is electrically connected to the first terminal of the first transistor; the second terminal of the first capacitor is electrically connected to the second terminal of the second transistor and is grounded; the first terminal of the second capacitor is electrically connected to the first buck module; the second terminal of the second capacitor is grounded; the first terminal of the third capacitor is electrically connected to the first buck module; the second terminal of the third capacitor is grounded.
[0028] Optionally, the isolation driving unit further includes a third resistor and a fourth capacitor; the first input terminal of the isolation driving chip is also electrically connected to the output terminal of the pulse generating module through the third resistor;
[0029] The input voltage source of the isolation driver chip is electrically connected to the first terminal of the fourth capacitor; the second terminal of the fourth capacitor is grounded.
[0030] Optionally, the narrow pulse current source further includes: a pulse adjustable module; the pulse adjustable module is connected to the pulse signal generating module.
[0031] Optionally, the model of the isolation driver chip includes: BM61S41RFV-C.
[0032] Secondly, this utility model embodiment also provides a testing device, which includes: the narrow pulse current source described in the first aspect and the load to be tested.
[0033] In this embodiment of the invention, the first step-down module converts the voltage signal output from the switching power supply module into a first step-down signal, which is then sent to the first voltage regulator module. The first voltage regulator module regulates the first step-down signal into a first regulated signal, which is then output to the signal conditioning module. Simultaneously, while the signal conditioning module is operational, the first step-down signal is also output to the second voltage regulator module. The second voltage regulator module regulates the first step-down signal into a second regulated signal, which is then output to the pulse signal generation module. The pulse signal generation module then outputs a first pulse signal with the second regulated signal as its high level to the signal conditioning module. At the same time, the second step-down module converts the voltage signal output from the switching power supply module into a second step-down signal, which is then sent to the signal conditioning module. This allows the signal conditioning module to adjust the first pulse signal with the second regulated signal as its high level into a second pulse signal with the second step-down signal as its high level. The second step-down signal is greater than the second regulated signal, thus increasing the amplitude of the first pulse signal. Furthermore, the minimum allowable pulse width of the signal conditioning module is a preset pulse width, preventing the pulse width of the narrow pulse current source from being too wide. This satisfies the testing accuracy requirements of the narrow pulse current source for the load and also achieves a low-cost design for the narrow pulse power source.
[0034] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description
[0035] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0036] Figure 1 This is a schematic diagram of the structure of a narrow pulse current source provided in an embodiment of the present invention;
[0037] Figure 2 This is a schematic diagram of the specific structure of a narrow pulse current source provided in this embodiment of the present invention;
[0038] Figure 3 This is a schematic diagram of a narrow pulse current source provided in an embodiment of the present invention;
[0039] Figure 4 This is a schematic diagram of a specific circuit for another narrow pulse current source provided in this embodiment of the present invention;
[0040] Figure 5 This is a schematic diagram of another narrow pulse current source provided in this embodiment of the present invention. Detailed Implementation
[0041] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.
[0042] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0043] Figure 1 This is a schematic diagram of a narrow pulse current source provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the narrow pulse current source includes: a switching power supply module 10, a first step-down module 20, a first voltage regulator module 30, a second step-down module 40, a second voltage regulator module 50, a pulse signal generation module 60, and a signal conditioning module 70;
[0044] The output terminal of the switching power supply module 10 is electrically connected to the input terminal of the first voltage regulator module 30 through the first step-down module 20; the output terminal of the first voltage regulator module 30 is electrically connected to the power supply terminal of the signal conditioning module 70.
[0045] The output terminal of the switching power supply module 10 is also electrically connected to the input terminal of the second voltage regulator module 50 through the first step-down module 20; the output terminal of the second voltage regulator module 50 is electrically connected to the input terminal of the pulse signal generator module 60; the output terminal of the pulse signal generator module 60 is electrically connected to the input terminal of the signal conditioning module 70; the output terminal of the signal conditioning module 70 is electrically connected to the load under test; the output terminal of the switching power supply module 10 is also electrically connected to the voltage regulation terminal of the signal conditioning module 70 through the second step-down module 40.
[0046] The minimum allowable pulse width of the signal conditioning module 70 is a preset pulse width; the voltage value at the voltage conditioning terminal of the signal conditioning module 70 is greater than the maximum voltage at the input terminal of the signal conditioning module 70.
[0047] The switching power supply module 10 can output a certain voltage signal according to a certain duty cycle adjustment, such as a 36V voltage signal; the first step-down module 20 can convert the voltage signal output by the switching power supply module 10 into a first step-down signal, such as a 12V voltage signal; the first voltage regulator module 30 can regulate the first step-down signal into a first voltage regulator signal and output it to the power supply terminal of the signal regulation module 70, such as a 5V voltage signal.
[0048] The second voltage regulator module 50 can regulate the first step-down signal into a second regulated signal, such as a voltage signal below 12V, and output it to the pulse signal generation module 60; the pulse signal generation module 60 can generate a first pulse signal based on the second regulated signal, wherein the first pulse signal is a pulse signal with a high level representing the second regulated signal and a low level representing 0 level; the pulse signal generation module 60 then sends the first pulse signal to the input terminal of the signal conditioning module 70;
[0049] The second step-down module 40 can convert the voltage signal output by the switching power supply module 10 into a second step-down signal and output it to the voltage regulation terminal of the signal conditioning module 70, such as an 18V voltage signal; that is, to ensure that the voltage value at the voltage regulation terminal of the signal conditioning module 70 is greater than the highest voltage at the input terminal of the signal conditioning module 70; that is, to ensure that the second step-down signal is greater than the second regulated signal.
[0050] The signal conditioning module 70 can generate a second pulse signal based on the first pulse signal and the second buck signal; wherein, the second pulse signal is a pulse signal with a high level being the second buck signal and a low level being 0 level; the signal conditioning module 70 can be any module that generates the second pulse signal, and this embodiment does not limit the specific type.
[0051] The minimum allowable pulse width of the signal conditioning module 70 is a preset pulse width; the preset pulse width can be 60ns; the minimum allowable pulse width of the pulse signal passed through the signal conditioning module 70 is the preset pulse width, so as to avoid the pulse width of the pulse signal output by the signal conditioning module 70 being too wide, which would not meet the narrow pulse width requirement of the narrow pulse current source.
[0052] Specifically, in this embodiment, the first step-down module 20 converts the voltage signal output from the switching power supply module 10 into a first step-down signal and sends it to the first voltage regulator module 30. The first voltage regulator module 30 then regulates the first step-down signal into a first regulated signal and outputs it to the power supply terminal of the signal conditioning module 70. With the signal conditioning module 70 in operation, the first step-down signal is simultaneously output to the second voltage regulator module 50. The second voltage regulator module 50 regulates the first step-down signal into a second regulated signal and outputs it to the pulse signal generation module 60. The pulse signal generation module 60 then outputs a first pulse signal with the second regulated signal at a high level to the signal conditioning module 70. Simultaneously, the second step-down module... The voltage signal output by the switching power supply module 10 is converted into a second step-down signal and sent to the signal conditioning module 70. In this way, the signal conditioning module 70 can adjust the first pulse signal, which is based on the second regulated signal, to a second pulse signal, which is based on the second step-down signal. The second step-down signal is greater than the second regulated signal, thus increasing the amplitude of the first pulse signal. At the same time, the minimum allowable pulse width of the signal conditioning module 70 is a preset pulse width, which avoids the pulse width of the narrow pulse current source being too wide. This satisfies the test accuracy of the narrow pulse current source for the load. In addition, since the narrow pulse current source is composed of discrete components, a low-cost design of the narrow pulse power source is also achieved.
[0053] Optionally, based on the above embodiments, further refinements can be made. Figure 2 This is a schematic diagram of the specific structure of a narrow pulse current source provided in an embodiment of this utility model, as shown below. Figure 2 As shown, the signal conditioning module 70 includes an isolation drive unit 71 and a power conditioning output unit 72. The power supply terminal of the isolation drive unit 71 serves as the power supply terminal of the signal conditioning module 70 and is electrically connected to the output terminal of the first voltage regulator module 30. The input terminal of the isolation drive unit 71 serves as the input terminal of the signal conditioning module 70 and is electrically connected to the output terminal of the pulse signal generator module 60. The output terminal of the second step-down module 40 is electrically connected to the voltage conditioning terminal of the power conditioning output unit 72. The voltage conditioning terminal of the power conditioning output unit 72 serves as the voltage regulation terminal of the signal conditioning module 70. The output terminal of the isolation drive unit 71 is electrically connected to the input terminal of the power conditioning output unit 72. The output terminal of the power conditioning output unit 72 is electrically connected to the load under test.
[0054] The minimum allowable pulse width of the isolation drive unit 71 is a preset pulse width; the voltage value of the voltage adjustment terminal of the power adjustment output unit 72 is greater than the maximum voltage of the input terminal of the power adjustment output unit 72.
[0055] Specifically, the isolation drive unit 71 can isolate and boost the first pulse signal output by the pulse signal generation module 60 to a specified pulse signal (the high level of the specified pulse signal is greater than the high level of the first pulse signal and less than the high level of the second pulse signal), and output it to the power regulation output unit 72; it can also isolate the first pulse signal from the specified pulse signal, avoiding interference from the specified pulse signal input to the power regulation output unit 72 to the first pulse signal; the isolation drive unit 71 can improve the reliability of the specified pulse signal input to the power regulation output unit 72, thereby improving the reliability of the signal output by the power regulation output unit 72; the isolation drive unit 71 can be of any form, and this embodiment does not limit it.
[0056] The power regulation output unit 72 can convert a specified pulse signal into a second pulse signal. Since the high level of the specified pulse signal is lower than the high level of the second pulse signal, the amplitude of the first pulse signal is increased. At the same time, the minimum allowable pulse width of the isolation drive unit 71 is a preset pulse width, avoiding the pulse width of the narrow pulse current source being too wide. This satisfies the testing accuracy of the narrow pulse current source for the load. The power regulation output unit 72 can be of any form, and this embodiment does not limit it.
[0057] Optional, Figure 3 This is a schematic diagram of a narrow pulse current source provided in an embodiment of the present invention; as shown below. Figure 3 As shown, the isolation drive unit 71 includes an isolation drive chip U1; the input voltage source VCC1 of the isolation drive chip U1 is electrically connected to the output terminal of the first voltage regulator module 30; the first input terminal INA of the isolation drive chip U1 is electrically connected to the output terminal of the pulse generator module 60; the second input terminal INB of the isolation drive chip U1 is grounded; the output voltage source VCC2 of the isolation drive chip U1 is electrically connected to the second buck module 40; and the output terminal OUT of the isolation drive chip U1 is electrically connected to the input terminal of the power regulation output unit 72. In this embodiment, the isolation drive unit 71 can be the isolation drive chip U1; the model of the isolation drive chip U1 includes BM61S41RFV-C. The isolation drive chip U1 can isolate and boost the first pulse signal output by the pulse signal generator module 60 to a specified pulse signal. Simultaneously, the minimum allowable pulse width of the isolation drive chip U1 is a preset pulse width, avoiding excessively wide pulse widths from narrow pulse current sources.
[0058] Optional, continue to refer to Figure 3The power regulation output unit 72 includes a push-pull circuit 721; the push-pull circuit 721 includes a first transistor K1 and a second transistor K2; the first terminal of the first transistor K1 is electrically connected to the second step-down module 40; the control terminal of the first transistor K1 is connected to the control terminal of the second transistor K2, and is also electrically connected to the output terminal OUT of the isolation driver chip U1; the second terminal of the first transistor K1 is electrically connected to the first terminal of the second transistor K2, and is also electrically connected to the load under test; the second terminal of the second transistor K2 is grounded.
[0059] In this circuit, the first transistor is an NPN transistor and the second transistor is a PNP transistor. The first terminal of the first transistor K1 is electrically connected to the second step-down module 40, meaning that the first terminal of the first transistor K1 receives the second step-down signal. Specifically, when the push-pull circuit 721 outputs a high-level signal from the specified pulse signal, the first transistor is NPN and conducts, while the second transistor is PNP and cut off, thus outputting the second step-down signal. When the push-pull circuit 721 outputs a low-level signal from the specified pulse signal, the first transistor is NPN and cut off, while the second transistor is PNP and conducts, thus outputting a 0-level signal. This process is repeated to generate the second pulse signal. The high voltage of the second pulse signal is the second step-down signal. Since the high-level signal of the second pulse signal is greater than the high-level signal of the first pulse signal, the amplitude of the first pulse signal is increased.
[0060] Optional, Figure 4 This is a schematic diagram of another narrow pulse current source provided in an embodiment of the present invention; as shown below. Figure 4 As shown, the push-pull circuit 721 further includes: a first resistor R1, a Zener diode D1, and a second resistor R2; the first terminal of the first resistor R1 is electrically connected to the second terminal of the first transistor K1; the second terminal of the first resistor R1 is electrically connected to the load under test; the first terminal of the Zener diode D1 is electrically connected to the first terminal of the first resistor R1; the second terminal of the Zener diode D1 is electrically connected to the first terminal of the second resistor R2; the second terminal of the second resistor R2 is electrically connected to the second terminal of the first resistor R1; the second terminal of the second resistor R2 is also electrically connected to the clamping terminal MC of the isolation driver chip U1. The first resistor R1, the Zener diode D1, and the second resistor R2 serve an anti-oscillation function, i.e., a filtering function, thereby improving the reliability of the second pulse signal and thus improving the reliability of the test.
[0061] Optional, continue to refer to Figure 4The push-pull circuit 721 further includes: a first capacitor C1, a second capacitor C2, and a third capacitor C3; the first terminal of the first capacitor C1 is electrically connected to the first terminal of the first transistor K1; the second terminal of the first capacitor C1 is electrically connected to the second terminal of the second transistor K2 and is grounded; the first terminal of the second capacitor C2 is electrically connected to the second buck module 40; the second terminal of the second capacitor C2 is grounded; the first terminal of the third capacitor C3 is electrically connected to the second buck module 40; the second terminal of the third capacitor C3 is grounded. The first capacitor C1, the second capacitor C2, and the third capacitor C3 serve a filtering function, thereby improving the reliability of the second buck signal and the second pulse signal.
[0062] Optional, continue to refer to Figure 4 The isolation drive unit 71 also includes: a third resistor R3 and a fourth capacitor C4; the first input terminal INA of the isolation drive chip U1 is also electrically connected to the output terminal of the pulse generation module 60 through the third resistor R3; the input voltage source VCC1 of the isolation drive chip U1 is electrically connected to the first terminal of the fourth capacitor C4; the second terminal of the fourth capacitor C4 is grounded. The third resistor R3 serves to limit current; the fourth capacitor C4 serves to stabilize the first step-down signal.
[0063] Optional, continue to refer to Figure 4 The isolation drive unit 71 also includes: a fourth resistor R4 and a fifth capacitor C5; the first end of the fifth capacitor C5 is electrically connected to the second end of the third resistor R3; the second end of the fifth capacitor C5 is grounded; the fifth capacitor C5 can also serve as a filter; the first end of the fourth resistor R4 is electrically connected to the second end of the second resistor R2; the second end of the fourth resistor R4 is grounded; the fourth resistor R4 can also serve as a filter.
[0064] Optional, Figure 5 This is a schematic diagram of another narrow pulse current source provided by an embodiment of the present invention, as shown below. Figure 5 As shown, the narrow pulse current source also includes a pulse adjustable module 80; the pulse adjustable module 80 is connected to the pulse signal generation module 60. The pulse adjustable module 80 can adjust the frequency of the first pulse signal to suit the testing requirements of different loads; furthermore, the pulse adjustable module 80 can adjust both the frequency of the first pulse signal and the frequency of the second pulse signal of the narrow pulse current source, thereby improving testing accuracy.
[0065] Based on the same inventive concept, this embodiment of the invention also provides a testing device, which includes the narrow pulse current source described in the first aspect and the load to be tested. Since this testing device also includes the aforementioned narrow pulse current source and possesses the beneficial effects of the above embodiments, it will not be repeated here.
[0066] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.
Claims
1. A narrow pulse current source, characterized in that, include: The system includes a switching power supply module, a first step-down module, a second step-down module, a first voltage regulator module, a second voltage regulator module, a pulse signal generation module, and a signal conditioning module. The output terminal of the switching power supply module is electrically connected to the input terminal of the first voltage regulator module through the first step-down module; the output terminal of the first voltage regulator module is electrically connected to the power supply terminal of the signal conditioning module. The output terminal of the switching power supply module is electrically connected to the input terminal of the second voltage regulator module through the first step-down module; the output terminal of the second voltage regulator module is electrically connected to the input terminal of the pulse signal generator module; the output terminal of the pulse signal generator module is electrically connected to the input terminal of the signal conditioning module; the output terminal of the signal conditioning module is electrically connected to the load under test; the output terminal of the switching power supply module is also electrically connected to the voltage regulation terminal of the signal conditioning module through the second step-down module. The minimum allowable pulse width of the signal conditioning module is a preset pulse width; the voltage value at the voltage adjustment terminal of the signal conditioning module is greater than the maximum voltage at the input terminal of the signal conditioning module.
2. The narrow pulse current source according to claim 1, characterized in that, The signal conditioning module includes an isolation drive unit and a power conditioning output unit; The power supply terminal of the isolation drive unit serves as the power supply terminal of the signal conditioning module and is electrically connected to the output terminal of the first voltage regulator module. The input terminal of the isolation drive unit serves as the input terminal of the signal conditioning module and is electrically connected to the output terminal of the pulse signal generating module. The output terminal of the second step-down module is electrically connected to the voltage adjustment terminal of the power adjustment output unit; the voltage adjustment terminal of the power adjustment output unit serves as the voltage regulation terminal of the signal conditioning module. The output terminal of the isolation drive unit is electrically connected to the input terminal of the power regulation output unit; the output terminal of the power regulation output unit is electrically connected to the load under test. The minimum allowable pulse width of the isolation drive unit is a preset pulse width; the voltage value at the voltage adjustment terminal of the power regulation output unit is greater than the maximum voltage at the input terminal of the power regulation output unit.
3. The narrow pulse current source according to claim 2, characterized in that, The isolation drive unit includes an isolation drive chip; the input voltage source of the isolation drive chip is electrically connected to the output terminal of the first voltage regulator module. The first input terminal of the isolation driver chip is electrically connected to the output terminal of the pulse signal generating module; The second input terminal of the isolation driver chip is grounded; The output voltage source of the isolation driver chip is electrically connected to the second buck module; The output terminal of the isolation driver chip is electrically connected to the input terminal of the power regulation output unit.
4. The narrow pulse current source according to claim 3, characterized in that, The power regulation output unit includes a push-pull circuit; the push-pull circuit includes a first transistor and a second transistor; The first terminal of the first transistor is electrically connected to the second step-down module; the control terminal of the first transistor is connected to the control terminal of the second transistor, and is also electrically connected to the output terminal of the isolation driver chip. The second terminal of the first transistor is electrically connected to the first terminal of the second transistor and to the load under test; the second terminal of the second transistor is grounded.
5. The narrow pulse current source according to claim 4, characterized in that, The push-pull circuit further includes: a first resistor, a Zener diode, and a second resistor; The first terminal of the first resistor is electrically connected to the second terminal of the first transistor; the second terminal of the first resistor is electrically connected to the load under test; the first terminal of the Zener diode is electrically connected to the first terminal of the first resistor; the second terminal of the Zener diode is electrically connected to the first terminal of the second resistor; the second terminal of the second resistor is electrically connected to the second terminal of the first resistor. The second end of the second resistor is also electrically connected to the clamping end of the isolation driver chip.
6. The narrow pulse current source according to claim 4, characterized in that, The push-pull circuit further includes: a first capacitor, a second capacitor, and a third capacitor; The first terminal of the first capacitor is electrically connected to the first terminal of the first transistor; the second terminal of the first capacitor is electrically connected to the second terminal of the second transistor and is grounded; the first terminal of the second capacitor is electrically connected to the first buck module; the second terminal of the second capacitor is grounded; the first terminal of the third capacitor is electrically connected to the first buck module; the second terminal of the third capacitor is grounded.
7. The narrow pulse current source according to claim 4, characterized in that, The isolation drive unit further includes a third resistor and a fourth capacitor; the first input terminal of the isolation drive chip is also electrically connected to the output terminal of the pulse signal generation module through the third resistor. The input voltage source of the isolation driver chip is electrically connected to the first terminal of the fourth capacitor; the second terminal of the fourth capacitor is grounded.
8. The narrow pulse current source according to claim 1, characterized in that, Also includes: Pulse adjustable module; The pulse adjustable module is connected to the pulse signal generating module.
9. The narrow pulse current source according to claim 3, characterized in that, The model of the isolation driver chip includes: BM61S41RFV-C.
10. A testing apparatus, characterized in that, include: The narrow pulse current source and the load under test as described in any one of claims 1-9 above.