Detection system and method for high-power MOS tube

Abstract

A detection system and method for a high-power MOS tube are disclosed. The system comprises a detected MOS tube, a sampling detection circuit unit, a grid electrode voltage power supply, a drain electrode voltage power supply, a D / A conversion unit, a single-chip microcomputer control and data processing unit, a computer, a display unit, and a keyboard. The method includes the following steps: (S1) collecting a drain electrode current value of the detected MOS tube by the sampling detection circuit unit; (S2) performing data conversion on the collected drain electrode current value by an A / D conversion circuit; (S3) conveying converted digital quantity data to a single-chip microcomputer circuit; (S4) transmitting multiple collected drain electrode current values of the MOS tube to the single-chip microcomputer control and data processing unit by the single-chip microcomputer circuit; (S5) classifying and screening received data by the single-chip microcomputer control and data processing unit; and (S6) performing data display on a screening result by the display unit. The detection system and method enable a user to quickly screen out the MOS tube with good or bad consistency of drain electrode current from batch high-power MOS tubes, and have the advantages of high accuracy and convenient usage.

Description

technical field [0001] The invention relates to the technical field of MOS transistor detection, and more particularly relates to a high-power MOS transistor drain current consistency detection system and method. Background technique [0002] The solid-state power amplifier module of the universal terrestrial digital transmitter for radio and television has many characteristics such as high gain, high linearity, good consistency, strong interchangeability, and convenient maintenance. It is composed of multiple MOS tubes, and each field effect tube is connected with a matching circuit. Single Tube Amplifier. A group of balanced amplifiers is formed by two single-tube amplifiers and a 3DB quadrature bridge. The two groups of balanced amplifiers perform power synthesis through an in-phase synthesizer. In order to obtain greater output power, multi-stage power synthesis technology is used to achieve the required output power. Power amplifier The power redundancy of the module i...

AI Technical Summary

Problems solved by technology

The insulating layer in the MOS field effect tube is thin, and the capacitance composed of the grid, insulating layer and substrate is very small. The static electricity of the human body will generate a high voltage on the insulating layer through contact discharge, which will cause the insulating layer of the field effect tube to be broken down. so as to damage the MOS tube

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