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High-voltage fast-edge negative pulse generator

A generation device and negative pulse technology, applied in the field of high-voltage fast-edge negative pulse generation devices, can solve the problem that the falling edge time of the board-level negative pulse generation device cannot reach the nanosecond level, is not suitable for integration and miniaturization test requirements, cannot be Meet nanosecond measurement requirements and other issues, achieve high practicability and economic benefits, improve effective measurement accuracy, and low cost

Inactive Publication Date: 2018-12-25
CHINA SOUTH IND GRP AUTOMATION RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem that the falling edge time of the existing board-level negative pulse generation device cannot reach the nanosecond level, it cannot meet the measurement requirements of the nanosecond level; and the special signal generation device is expensive and bulky and is not suitable for integration and miniaturization testing To meet technical problems such as demand, the present invention proposes a high-voltage fast-edge negative pulse generator, which has a simple structure, high reliability, and low cost, and can well realize the setting of voltage amplitude, pulse width, and falling edge time. Suitable for high and demanding industrial measurement fields

Method used

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Embodiment 1

[0020] Such as figure 1 As shown, a high-voltage fast-edge negative pulse generating device is composed of FPGA, D / A conversion device, analog switch and operational amplifier; in this embodiment, the shown FPGA ( figure 1 Not shown in), the D / A converter ( figure 1 Middle U142) is the DAC chip AD5620 of ADI Company, the analog switch ( figure 1 Among U143) is the analog switch TS5A63157 of TI Company, the operational amplifier ( figure 1 Middle U13) selects the operation amplifier PA119CE of APEX Company for use.

[0021] Specifically, the output signal of the FPGA includes a digital voltage signal and a control signal, the digital voltage signal of the FPGA is input into the chip AD5620 through the pin 7 of the chip AD5620, and the control signal of the FPGA is passed through the pin 5 and the pin of the chip AD5620 6 inputs, the control chip AD5620 converts the input digital signal into an analog signal, the analog signal is then output through the pin 4 of the chip AD56...

Embodiment 2

[0024] Based on the high-voltage fast-edge negative pulse generating device described in the above-mentioned embodiments, a simulation test is carried out on it. The resistance R1 is 1kΩ, and the resistance value is 7.87kΩ; by adjusting the capacitance value of the capacitor C1, the test results shown in the following table 1 can be obtained. It can be seen from Table 1 that the value of the capacitor C1 is 1.8pF, which can ensure that the negative pulse generating device The falling edge time is within 30ns, and the waveform amplitude is stable and the ripple is small, such as figure 1 shown.

[0025] Table 1 The falling edge time of the negative pulse generator when the capacitor C1 takes different capacitance values

[0026] serial number

[0027] as table 1 and figure 2 As shown, when the value of the capacitor C1 is 1.8pF, the falling edge time of the negative pulse generator can be within 30ns. And the waveform amplitude is stable and the ripple is small. ...

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Abstract

The invention discloses a high-voltage fast-edge negative pulse generator. According to the high-voltage fast-edge negative pulse generator, based on control of FPGA, the output voltage amplitude is adjusted by adjusting resistance values of a resistor R1 and a resistor R2; by adjusting a capacitor C1, the falling edge time of the negative pulse generator can be well realized within 30ns, and thewaveform amplitude is stable and the wave line is small; circuit implementation of the negative pulse generator is simple, reliability is high, and the cost is lower, and thus arrangement of the voltage amplitude, the pulse width and the falling edge time can be realized advantageously; and the signal precision is high, thus the high-voltage fast-edge negative pulse generator can be widely used inthe high demanding nanosecond industrial measurement field, and the effective measurement precision is improved.

Description

technical field [0001] The invention relates to the field of industrial measuring equipment, in particular to a high-voltage fast-edge negative pulse generating device. Background technique [0002] Pulse signal generator, a generator capable of generating rectangular pulses with adjustable width, amplitude and repetition rate, widely used to test the transient response of linear systems, or used as an analog signal to test radar, multiplex communications and other pulse digital systems performance. [0003] In the field of industrial measurement, the existing high-voltage negative pulse generators mainly use board-level integrated negative pulse generators, and the falling edge time of such board-level integrated negative pulse generators cannot reach the nanosecond level, which cannot satisfy Demands in the field of high-rigority nanosecond-level industrial measurement; in addition, there have also appeared some negative pulse generators that can achieve a falling edge ti...

Claims

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Application Information

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IPC IPC(8): G01R1/28
CPCG01R1/28
Inventor 蒲实徐碧辉孙广明
Owner CHINA SOUTH IND GRP AUTOMATION RES INST
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