High-frequency current generating circuit and high-frequency current generating device

Abstract

The utility model discloses a high-frequency current generating circuit and a high-frequency current generating device, and belongs to the technical field of electronics, and the high-frequency current generating circuit comprises a current conversion unit, a charging and discharging control unit, a charging and discharging unit and an output control unit. The current conversion unit is used for converting externally input alternating current into direct current to be output, the input end of the charging and discharging control unit is connected with the output end of the current conversion unit, the input end of the charging and discharging unit is connected with the output end of the charging and discharging control unit, and the charging and discharging unit is used for generating high-frequency instantaneous current. The charging and discharging control unit is used for controlling on-off of a circuit between the current conversion unit and the charging and discharging unit, the input end of the output control unit is connected with the output end of the charging and discharging unit, and the output control unit is used for controlling on-off of a circuit between the charging and discharging unit and a tested product. The high-frequency instantaneous current is generated by using a simple circuit structure, and the size of a device for packaging the circuit is reduced.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to a high-frequency current generating circuit and a high-frequency current generating device. Background Art

[0002] Existing technologies typically generate a fixed-frequency 8-20 kHz short-circuit lightning impulse current using a lightning surge generator, or generate high-frequency current using expensive high-frequency current generators. High-frequency current generators are bulky, costly, difficult to carry, and require fixed use in a specific test environment. The 8-20 kHz short-circuit lightning impulse current generated by a lightning surge generator has a frequency of approximately 125 kHz and is only adaptable to specific frequencies. Furthermore, commonly used power-frequency current generators are incapable of generating high-frequency transient current. Therefore, finding a way to generate the required high-frequency transient current using a simple circuit structure while reducing the size of the device encapsulating the circuit is a pressing technical challenge. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a high-frequency current generating circuit that generates high-frequency instantaneous current using a simple circuit structure and reduces the size of the device encapsulating the circuit.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions:

[0005] According to the first embodiment of the present application, a high-frequency current generating circuit includes:

[0006] A current conversion unit, configured to convert externally input alternating current into direct current output;

[0007] a charge and discharge control unit, wherein an input end of the charge and discharge control unit is connected to an output end of the current conversion unit;

[0008] A charge and discharge unit, wherein the input end of the charge and discharge unit is connected to the output end of the charge and discharge control unit, the charge and discharge unit is used to generate a high-frequency instantaneous current, and the charge and discharge control unit is used to control the on-off of the circuit between the current conversion unit and the charge and discharge unit;

[0009] An output control unit, wherein the input end of the output control unit is connected to the output end of the charge and discharge unit, and the output control unit is used to control the on-off of the circuit between the charge and discharge unit and the product under test.

[0010] According to the first embodiment of the present application, the high-frequency current generating circuit has at least the following beneficial effects: external AC current enters the current conversion unit, which converts the AC current into DC current. By controlling the charge-discharge control unit to connect the current conversion unit and the charge-discharge unit, the DC current enters the charge-discharge unit for charging and energy storage. When the output control unit is connected to the test object, the output control unit is controlled to connect the test object and the charge-discharge unit. After the charge-discharge unit charges for a period of time, the charge-discharge control unit is controlled to disconnect the current conversion unit from the charge-discharge unit, and the charge-discharge unit releases a high-frequency instantaneous current to the test object. The magnitude of the high-frequency instantaneous current is related to the energy storage capacity of the charge-discharge unit. Therefore, by adjusting the energy storage capacity of the charge-discharge unit, the generation of different high-frequency instantaneous currents can be adapted. Therefore, compared with the related art, the circuit structure of the present application is simpler, thereby making the high-frequency current generating device encapsulating the circuit smaller in size; and the charge-discharge unit can be more flexibly configured to meet different high-frequency instantaneous current requirements. Therefore, the embodiments of the present application solve the problems of how to use a simple circuit structure to generate high-frequency instantaneous current and how to reduce the size of the device encapsulating the circuit.

[0011] According to some embodiments of the first aspect of the present application, a plurality of charging and discharging units are provided, each of the charging and discharging units includes a charging capacitor and a capacitance switching switch, the second end of each capacitance switching switch is connected to the first end of the corresponding charging capacitor, the first end of each capacitance switching switch and the second end of the corresponding charging capacitor are connected to the output end of the charging and discharging control unit, and the capacitance of the charging capacitor of each charging and discharging unit is different.

[0012] According to some embodiments of the first aspect of the present application, the output control unit includes a trigger switch and two output terminals, the first end of the trigger switch is connected to the second end of each of the charging capacitors, and the second end of the trigger switch is connected to one of the output terminals; the other output terminal is connected to the first end of each of the capacitance switching switches, and the two output terminals are used to respectively connect the positive terminal and the negative terminal of the tested product.

[0013] According to some embodiments of the first aspect of the present application, the high-frequency current generating circuit further includes a voltage-adjustable unit, the input end of the voltage-adjustable unit being connected to the output end of the current conversion unit, the output end of the voltage-adjustable unit being connected to the input end of the charge-discharge control unit, and the voltage-adjustable unit being used to adjust the voltage output to the charge-discharge unit. According to some embodiments of the present application, the voltage-adjustable unit includes a sliding rheostat, the input end of the sliding rheostat being connected to the output end of the current conversion unit, and the output end of the sliding rheostat being electrically connected to the input end of the charge-discharge control unit.

[0014] According to some embodiments of the first aspect of the present application, the voltage adjustable unit includes a sliding rheostat, both fixed terminals of the sliding rheostat are connected to the output end of the current conversion unit, and the adjustable terminal of the sliding rheostat is electrically connected to the input end of the charge and discharge control unit.

[0015] According to some embodiments of the first aspect of the present application, the charge and discharge control unit includes a first switch and a second switch, the first end of the first switch is connected to the positive output end of the current conversion unit, the first end of the second switch is connected to the negative output end of the current conversion unit, and the second ends of the first switch and the second switch are both connected to the input end of the charge and discharge unit.

[0016] The high-frequency current generating device according to the second embodiment of the present application includes the high-frequency current generating circuit described in the first embodiment of the present application.

[0017] According to some embodiments of the second aspect of the present application, the high-frequency current generating device includes a shell, the high-frequency current generating circuit is encapsulated in the shell, the shell is provided with a power wiring port, the power wiring port is connected to the input end of the current conversion unit, the charging and discharging unit includes a charging capacitor and a capacitance switching switch, the capacitance switching switch is embedded in the shell, the output control unit includes a trigger switch and two output terminals, the trigger switch and the two output terminals are embedded in the shell.

[0018] The present application is further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a principle block diagram of an embodiment of a high-frequency current generating circuit of the present application;

[0020] Figure 2 This is a principle block diagram of another embodiment of the high-frequency current generating circuit of the present application;

[0021] Figure 3 This is a circuit diagram of an embodiment of a high-frequency current generating circuit of the present application;

[0022] Figure 4 A schematic diagram of an embodiment of a high-frequency current generating device of the present application;

[0023] Figure 5 This is a test principle diagram of an embodiment of the high-frequency current generating circuit of the present application.

[0024] Reference numerals:

[0025] Current conversion unit 101 , charge and discharge control unit 102 , charge and discharge unit 103 , output control unit 104 , voltage adjustable unit 105 . DETAILED DESCRIPTION

[0026] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0027] In the description of this application, it should be understood that descriptions involving orientations, such as the orientations or positional relationships indicated by up, down, front, back, left, and right, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0028] In the description of this application, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0029] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0030] The embodiments of the present application are further described below with reference to the accompanying drawings.

[0031] Figure 1 This is a principle block diagram of an embodiment of the high-frequency current generating circuit of the present application. Figure 1As shown, the high-frequency current generating circuit of the embodiment of the present application includes a current conversion unit 101, a charge and discharge control unit 102, a charge and discharge unit 103 and an output control unit 104. The current conversion unit 101 is used to convert external input alternating current into direct current output. The input end of the charge and discharge control unit 102 is connected to the output end of the current conversion unit 101, and the input end of the charge and discharge unit 103 is connected to the output end of the charge and discharge control unit 102. The charge and discharge unit 103 is used to generate high-frequency instantaneous current. The charge and discharge control unit 102 is used to control the circuit between the current conversion unit 101 and the charge and discharge unit 103. The input end of the output control unit 104 is connected to the output end of the charge and discharge unit 103. The output control unit 104 is used to control the circuit between the charge and discharge unit 103 and the tested product.

[0032] In the above embodiment, the AC current generated by the power supply enters the current conversion unit 101, and the current conversion unit 101 converts the AC power into DC power. By controlling the charge and discharge control unit 102, the current conversion unit 101 and the charge and discharge unit 103 are connected, so that the DC current enters the charge and discharge unit 103 for charging and energy storage. When the output control unit 104 is connected to the test object, the output control unit 104 makes the test object and the charge and discharge unit 103 connected. After the charge and discharge unit 103 charges for a period of time, the charge and discharge control unit 102 disconnects the current conversion unit 101 and the charge and discharge unit 103, and the charge and discharge unit 103 releases a high-frequency instantaneous current to the test object. Among them, the magnitude of the high-frequency instantaneous current is related to the energy storage of the charge and discharge unit 103. Therefore, by adjusting the energy storage capacity of the charge and discharge unit 103, the generation of different high-frequency instantaneous currents can be adapted. The circuit structure of the present application is simpler, thereby making the high-frequency current generating device encapsulating the circuit smaller in size; and the charge and discharge unit 103 can be configured more flexibly, thereby meeting the requirements of different high-frequency instantaneous currents.

[0033] In some embodiments, the current conversion unit 101 can be set to a rectifier or a rectifier circuit to realize the conversion between AC and DC. The embodiments of the present application do not limit the specific structure of the rectifier and the rectifier circuit. Those skilled in the art can selectively set it according to actual needs. The charge and discharge control unit 102 can be controlled by closing and opening the switch or by a device with a control function such as a transistor, etc., and the embodiments of the present application do not limit this. The charge and discharge unit 103 includes at least a capacitor so that when the charge and discharge unit 103 is disconnected from the charge and discharge control unit 102, a high-frequency instantaneous current can be generated. The output control unit 104 can be controlled by closing and opening the switch or by a device with a control function such as a transistor, etc., and the embodiments of the present application do not limit this.

[0034] Figure 3This is a circuit diagram of an embodiment of the high-frequency current generating circuit of the present application. It is understandable that, referring to Figure 3 As shown, a plurality of charge and discharge units 103 are provided, each of which includes a charging capacitor and a capacitance switching switch. The second end of each capacitance switching switch is connected to the first end of the corresponding charging capacitor, and the first end of each capacitance switching switch and the second end of the corresponding charging capacitor are connected to the output end of the charge and discharge control unit 102. The capacitance of the charging capacitor of each charge and discharge unit 103 is different.

[0035] The embodiment of the present application does not limit the number of charging and discharging units 103. Those skilled in the art can make adaptive adjustments according to the type of high-frequency instantaneous current that needs to be adapted. For example, if six different high-frequency instantaneous currents need to be generated, six charging and discharging units 103 can be set.

[0036] The capacitance of each charging and discharging unit 103 can be different, so that the frequency of the high-frequency instantaneous current generated by the discharge of each charging and discharging unit 103 is also different. For example, by closing one of the capacitance switching switches and keeping the other capacitance switching switches open, the charging and discharging control unit 102 is controlled to conduct the current conversion unit 101 and the charging and discharging unit 103, so that the corresponding charging capacitor is charged, and by controlling the output control unit 104 to conduct the charging and discharging unit 103 and the test product, when the current conversion unit 101 and the charging and discharging unit 103 are disconnected, the corresponding charging capacitor discharges to generate a high-frequency instantaneous current of a certain frequency and flows to the test product. In actual applications, different capacitance switching switches can be closed as needed to charge the corresponding charging capacitor, and the output control unit 104 can be controlled to conduct the charging and discharging unit 103 and the test product, so that the charging capacitor discharges to generate high-frequency instantaneous current of different frequencies that can flow to the test product.

[0037] For example, Figure 3As shown, taking the setting of 6 charge and discharge units as an example. An embodiment of the present application sets six charge and discharge units 103, wherein C1, C2, C3, C4, C5, and C6 are six charging capacitors with different capacitance values, K1, K2, K3, K4, K5, and K6 are six capacitance switching switches, C1 and K1 are connected in series to form a charge and discharge unit 103; C2 and K2 are connected in series to form a charge and discharge unit 103; C3 and K3 are connected in series to form a charge and discharge unit 103; C4 and K4 are connected in series to form a charge and discharge unit 103; C5 and K5 are connected in series to form a charge and discharge unit 103; C6 and K6 are connected in series to form a charge and discharge unit 103. In actual applications, the capacitance of the charging capacitor can be set according to the test current frequency and amplitude requirements. For example, the current frequency range corresponding to the set six charging capacitors is 100Hz~1MHz, and the corresponding current amplitude is 1A~1000A. During circuit operation, the capacitance switching switch connected to the charging capacitor corresponding to the required high-frequency transient current is closed to charge the charging capacitor. After charging is complete, the trigger switch is closed to discharge the charging capacitor, generating a high-frequency transient current that flows toward the product under test. For example, taking the charge-discharge unit 103 formed by C1 and K1 in series, the second end of K1 is connected to the first end of C1, the first end of K1 is connected to the positive output end of the charge-discharge control unit 102, and the second end of C1 is connected to the negative output end of the charge-discharge control unit 102. Closing K1 charges C1, while K2, K3, K4, K5, and K6 remain disconnected. After C1 is charged, closing CK causes C1 to discharge, generating a high-frequency transient current of the corresponding frequency that flows toward the product under test. Therefore, by providing six charge-discharge units, the high-frequency current generating circuit generates six high-frequency transient currents of different frequencies.

[0038] It is understandable that referring to Figure 3 As shown, the output control unit 104 includes a trigger switch CK and two output terminals. The first end of the trigger switch CK is connected to the second end of the charging capacitor, and the second end of the trigger switch CK is connected to one of the output terminals; the other output terminal is connected to the first end of the capacitance switching switch, and the two output terminals are respectively connected to the positive terminal and the negative terminal of the tested product.

[0039] The trigger switch CK can control the on / off of the circuit between the charge-discharge unit 103 and the DUT. When the charging capacitor is fully charged, the trigger switch CK is closed, and the charging capacitor discharges to generate a high-frequency transient current. The high-frequency transient current can flow from the output terminal through the trigger switch into the circuit of the DUT.

[0040] Figure 2 This is a principle block diagram of another embodiment of the high-frequency current generating circuit of the present application. It is understandable that, referring to Figure 2As shown, the high-frequency current generating circuit also includes a voltage adjustable unit 105, the input end of the voltage adjustable unit 105 is connected to the output end of the current conversion unit 101, and the output end of the voltage adjustable unit 105 is connected to the input end of the charge and discharge control unit 102. The voltage adjustable unit 105 is used to adjust the voltage output to the charge and discharge unit 103.

[0041] By setting the voltage adjustable unit 105, the voltage value of the output voltage can be adjusted. Different output voltages can make the same charging capacitor generate high-frequency instantaneous currents with different amplitudes. Therefore, when the number of charging and discharging units 103 is limited, it can adapt to more scenarios with different amplitude high-frequency instantaneous current requirements.

[0042] It is understandable that referring to Figure 3 As shown, the voltage adjustable unit 105 includes a sliding rheostat, both fixed terminals of the sliding rheostat are connected to the output terminal of the current conversion unit 101 , and the adjustable terminal of the sliding rheostat is electrically connected to the input terminal of the charge and discharge control unit 102 .

[0043] By utilizing the voltage dividing effect of the sliding rheostat, the resistance of the sliding rheostat can be changed to divide the output voltage of the current conversion unit 101 to obtain the required output voltage. Different output voltages cause the same charging capacitor to discharge and generate high-frequency instantaneous currents with different amplitudes.

[0044] For example, Figure 3 As shown, the sliding rheostat is Figure 3 R1 shown, the current conversion unit 101 is Figure 3 In the AC / DC power supply module shown, the first end of resistor R1 is connected to the positive output terminal of the AC / DC power supply module, and the second end of resistor R1 is connected to the negative output terminal of the AC / DC power supply module. By changing the position of the sliding resistor, the resistance of resistor R1 can be changed, so that the output voltage between the sliding resistor R1 and the second end of resistor R1 is the desired voltage. This allows the same charging capacitor to be charged with different output voltages, causing the same charging capacitor to discharge and generate high-frequency transient currents of varying amplitudes.

[0045] Understandable, refer to Figure 3 As shown, the voltage adjustable unit 105 further includes a voltmeter DV, a first end of the voltmeter DV is electrically connected to the adjustable terminal of the sliding rheostat, a second end of the voltmeter DV is connected to a fixed terminal of the sliding rheostat, and the voltmeter DV is used to detect the voltage of the sliding rheostat.

[0046] The voltmeter DV has the function of monitoring the regulated output voltage value.

[0047] For example, Figure 3 As shown, the sliding rheostat is Figure 3R1 shown, the voltmeter is Figure 3 As shown in FIG. 1 , the first end of DV is connected to the sliding resistor on R1, and the second end of DV is connected to R1. DV can display the output voltage value after voltage division by R1, thereby monitoring the output voltage value after adjustment by R1.

[0048] It is understandable that referring to Figure 3 As shown, the charge and discharge control unit 102 includes a first switch DK1 and a second switch DK2, wherein the first end of the first switch DK1 is connected to the positive output end of the current conversion unit 101, the first end of the second switch DK2 is connected to the negative output end of the current conversion unit 101, and the second ends of the first switch DK1 and the second switch DK2 are both connected to the input end of the charge and discharge unit 103.

[0049] The first switch DK1 and the second switch DK2 can control the on / off circuit between the AC / DC converter power module and the charging capacitor. When the capacitance switching switch is closed, closing the first switch DK1 and the second switch DK2 can charge the charging capacitor. After charging is completed, disconnecting the first switch DK1 and the second switch DK2 can stop charging the charging capacitor.

[0050] For example, Figure 3 As shown, the power switch DK includes a first switch DK1 and a second switch DK2. DK1 and DK2 are connected. When DK1 and DK2 are closed, DK1 connects to the first end of the capacitance switching switch, and DK2 connects to the second end of the charging capacitor. If K1 is closed while K2, K3, K4, K5, and K6 remain open, DK1 and DK2 are controlled to close, and charging of C1 begins. After C1 is fully charged, DK1 and DK2 are disconnected to stop charging C1. Alternatively, if K2 is closed while K1, K3, K4, K5, and K6 remain open, DK1 and DK2 are controlled to close, and charging of C2 begins. After C2 is fully charged, DK1 and DK2 are disconnected to stop charging C2. Closing DK1 and DK2 charges C1, C2, C3, C4, C5, and C6, respectively, and disconnecting DK1 and DK2 stops charging C1, C2, C3, C4, C5, and C6.

[0051] Figure 4 This is a schematic diagram of an embodiment of a high-frequency current generating device of the present application. Figure 4 As shown, the high-frequency current generating device of the second embodiment of the present application includes the high-frequency current generating circuit of the first embodiment of the present application.

[0052] The high-frequency current generating circuit of the first embodiment of the present application enables the high-frequency circuit generating device of the second embodiment of the present application to generate high-frequency instantaneous current with a small size and high portability.

[0053] It is understandable that referring to Figure 4 As shown, the high-frequency current generating device includes a shell, the high-frequency current generating circuit is encapsulated in the shell, the shell is provided with a power wiring port, the power wiring port is connected to the input end of the current conversion unit 101, the charging and discharging unit 103 includes a charging capacitor and a capacitance switching switch, the capacitance switching switch is embedded in the shell, and the output control unit 104 includes a trigger switch and two output terminals, and the trigger switch and the two output terminals are embedded in the shell.

[0054] A high-frequency current generating circuit with a simple structure is encapsulated in the shell of the high-frequency current generating device, which can reduce the volume of the high-frequency current generating device and improve portability. The output voltage can be directly observed on the shell and the charging and release of high-frequency instantaneous current of the high-frequency current generating device can be controlled.

[0055] For example, Figure 4 As shown, the adjusted output voltage value can be monitored by observing the display screen. The voltage adjustment knob is connected to the sliding resistor of the sliding rheostat. The output voltage value can be changed by rotating the voltage adjustment knob. The first switch and the second switch in the voltage adjustable unit 105 are press-on power switch buttons. By pressing the power switch button, the voltage adjustable unit 105 and the charge-discharge unit 103 can be connected. The capacitance switching switch is a capacitance switching switch button. By pressing the six capacitance switching switch buttons K1-K6 respectively, the corresponding charge-discharge unit 103 can be closed or disconnected. The trigger switch is a press-on trigger switch button. By pressing the trigger switch button, the charge-discharge unit 103 and the test product can be connected. Among them, the output terminal in the output control unit 104 can be set as a terminal. By using a wire to connect the terminal and the test product, the high-frequency current generating circuit is connected to the circuit of the test product.

[0056] Figure 5 This is a test schematic diagram of an embodiment of the high-frequency current generating circuit of the present application, illustratively, as Figure 5As shown, the entire test circuit includes an AC power supply AC, an AC / DC conversion power supply module AC / DC, a sliding rheostat R1, a voltmeter DV, a first switch DK1, a second switch DK2, charging capacitors C1-C6, capacitance switching switches K1-K6, a trigger switch CK, a switch main circuit CB, and a switch current transformer TA, wherein the switch main circuit CB and the switch current transformer TA are part of the circuit of the product under test. The test process includes three stages: capacitor charging, capacitor discharging, and detecting high-frequency transient current. Before starting the test, all switches are in the off state (including the first switch DK1, the second switch DK2, the capacitance switching switches K1-K6, and the trigger switch CK). Taking the detection of the high-frequency transient current generated by the discharge of C3 as an example, in the capacitor charging stage, K3 is first closed, and K1, K2, K4, K5, and K6 are kept in the off state. Then DK1 and DK2 are closed, the AC / DC is connected to AC, R1 is adjusted, and the output voltage value is observed through DV. At this time, C3 is in the charging state. At the same time, R1 can be adjusted to control the charging voltage of C3. For example, if the desired charging voltage is 100V DC, R1 can be adjusted to achieve a 100V DC output voltage. After C3 is fully charged, the capacitor discharge phase begins. Disconnect DK1 and DK2, and with the output terminals connected to the DUT, close CK to cause a short-circuit pulse discharge on C3, generating a high-frequency transient current of the corresponding frequency and amplitude. This is when the high-frequency transient current detection phase begins. During this phase, because the conductive rod of the CB passes through the primary side of the TA, a high-frequency transient current flows through the CB's conductive rods and through the TA. Connecting the secondary sides of the TA, as1 and as2, to a high-frequency oscilloscope, the high-frequency transient current generated by C3 can be monitored. Similarly, depending on the actual high-frequency transient current detection requirements, one of the capacitance switches K1-K6 can be closed to enable C1-C6 to generate a high-frequency transient current of the corresponding frequency during the capacitor discharge phase. Alternatively, R1 can be adjusted to vary the amplitude of the generated high-frequency transient current. Therefore, the embodiments of the present application can adapt to the testing requirements of high-frequency transient currents of different amplitudes and frequencies.

[0057] The embodiments of the present application have been described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. A high-frequency current generating circuit, characterized in that: include: A current conversion unit, configured to convert externally input alternating current into direct current output; a charge and discharge control unit, wherein an input end of the charge and discharge control unit is connected to an output end of the current conversion unit; A charge and discharge unit, wherein the input end of the charge and discharge unit is connected to the output end of the charge and discharge control unit, the charge and discharge unit is used to generate a high-frequency instantaneous current, and the charge and discharge control unit is used to control the on-off of the circuit between the current conversion unit and the charge and discharge unit; An output control unit, wherein the input end of the output control unit is connected to the output end of the charge and discharge unit, and the output control unit is used to control the on-off of the circuit between the charge and discharge unit and the product under test.

2. The high-frequency current generating circuit according to claim 1, characterized in that: There are multiple charging and discharging units, each of which includes a charging capacitor and a capacitance switching switch. The second end of each capacitance switching switch is connected to the first end of the corresponding charging capacitor, and the first end of each capacitance switching switch and the second end of the corresponding charging capacitor are connected to the output end of the charging and discharging control unit. The capacitance of the charging capacitor of each charging and discharging unit is different.

3. The high-frequency current generating circuit according to claim 2, characterized in that: The output control unit includes a trigger switch and two output terminals, the first end of the trigger switch is connected to the second end of each charging capacitor, and the second end of the trigger switch is connected to one of the output terminals; the other output terminal is connected to the first end of each capacitance switching switch, and the two output terminals are used to respectively connect the positive terminal and negative terminal of the tested product.

4. The high-frequency current generating circuit according to claim 1, characterized in that: The high-frequency current generating circuit also includes a voltage-adjustable unit, the input end of the voltage-adjustable unit is connected to the output end of the current conversion unit, the output end of the voltage-adjustable unit is connected to the input end of the charge and discharge control unit, and the voltage-adjustable unit is used to adjust the voltage output to the charge and discharge unit.

5. The high-frequency current generating circuit according to claim 4, characterized in that: The voltage adjustable unit includes a sliding rheostat, both fixed terminals of the sliding rheostat are connected to the output terminal of the current conversion unit, and the adjustable terminal of the sliding rheostat is electrically connected to the input terminal of the charge and discharge control unit.

6. The high-frequency current generating circuit according to claim 5, characterized in that: The voltage adjustable unit also includes a voltmeter, a first end of the voltmeter is electrically connected to the adjustable terminal of the sliding rheostat, a second end of the voltmeter is connected to a fixed terminal of the sliding rheostat, and the voltmeter is used to detect the voltage of the sliding rheostat.

7. The high-frequency current generating circuit according to claim 1, characterized in that: The charge and discharge control unit includes a first switch and a second switch, wherein the first end of the first switch is connected to the positive output end of the current conversion unit, the first end of the second switch is connected to the negative output end of the current conversion unit, and the second ends of the first switch and the second switch are both connected to the input end of the charge and discharge unit.

8. A high-frequency current generating device, characterized in that: The device comprises the high-frequency current generating circuit according to claim 1.

9. The high-frequency current generating device according to claim 8, characterized in that: The high-frequency current generating device includes a shell, the high-frequency current generating circuit is encapsulated in the shell, the shell is provided with a power wiring port, the power wiring port is connected to the input end of the current conversion unit, the charging and discharging unit includes a charging capacitor and a capacitance switching switch, the capacitance switching switch is embedded in the shell, the output control unit includes a trigger switch and two output terminals, the trigger switch and the two output terminals are embedded in the shell.

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