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A High Power Pulse Current/Voltage Generating Circuit

A voltage generation circuit, pulse current technology, applied in pulse generation, electric pulse generation, pulse technology and other directions, can solve problems such as low test accuracy and rising junction temperature of discrete devices

Inactive Publication Date: 2011-12-21
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the test of high-power discrete devices, in order to avoid the impact of low test accuracy caused by the rise of the junction temperature of discrete devices during continuous DC current / voltage testing, pulse current / voltage testing is the preferred method

Method used

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  • A High Power Pulse Current/Voltage Generating Circuit
  • A High Power Pulse Current/Voltage Generating Circuit
  • A High Power Pulse Current/Voltage Generating Circuit

Examples

Experimental program
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Embodiment

[0031] figure 2 It is a principle block diagram of a specific embodiment of the high-power pulse current / voltage generating circuit of the present invention.

[0032] In this example, if figure 2 As shown, the high-power pulse current / voltage generating circuit of the present invention also includes a CPU, and the function of the CPU is to send the duty cycle, frequency and amplitude control words of the high-power pulse current / voltage. In the present embodiment, the pulse source is realized with an FPGA chip, including the pulse duty ratio configuration register, the pulse frequency configuration register and the pulse generation circuit, the pulse duty ratio configuration register, the pulse frequency configuration register and the duty ratio provided by the CPU The control word and the frequency control word are temporarily stored, and the pulse generating circuit is controlled to generate a periodic pulse signal with a corresponding duty ratio and frequency. In additi...

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Abstract

The invention discloses a high-power pulse current / voltage generating circuit with programmable pulse width, duty ratio and pulse amplitude, wherein a digital-analog converter, an error amplifier, a power amplifier, a pulse current sampling circuit, a pulse voltage sampling circuit, a pulse current / voltage sampling selection switch and a peak detecting circuit are formed into a negative feedback loop. The amplitude analog signal output by the digital-analog converter is compared with the pulse peak obtained by the peak detecting circuit in the error amplifier; and the pulse peak is equal to the amplitude analog signal output by the digital-analog converter in the negative feedback loop. The power amplifier is connected with the output end of the comparator and is connected with the output end of the error amplifier through an input resistor; the comparator adjusts the frequency and duty ratio of the output high-power current / voltage under the control of the periodic pulse signal output by the pulse source, thus, the pulse width, the duty ratio and the pulse amplitude of the output pulse current / voltage of the high-power pulse current / voltage generating circuit can be adjusted.

Description

technical field [0001] The invention belongs to the technical field of signal generators, and more specifically relates to a high-power pulse current / voltage generation circuit. Background technique [0002] Semiconductor discrete devices, including transistors, MOS transistors, thyristors, and insulated gate bipolar transistors (IGBTs), have irreplaceable functions and advantages of integrated circuits in terms of high power, high reverse voltage, high current, and low noise. Therefore, the market prospect Very broad. However, for the test of high-power discrete devices, in order to avoid the impact of low test accuracy caused by the rise of the junction temperature of discrete devices during continuous DC current / voltage testing, pulse current / voltage testing is the preferred method. [0003] For the pulse test of high-power discrete devices, there must be a high-power pulse current / voltage excitation source to output pulse current / voltage with adjustable pulse width, dut...

Claims

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Application Information

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IPC IPC(8): H03K3/017
Inventor 詹惠琴王海恩张剑古军徐林古天祥李东凯李建辉商洪亮
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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