MOS管故障诊断方法及分析

Fault Diagnosis Methods and Analysis of MOS Tube

MOS管是全固态调频广播电视发射机功放模块的核心元器件。MOS管的放大能力及输出功率直接决定了发射机的输出功率,而发射机输出功率决定了发射信号的覆盖范围和接收场强的大小。功率放大单元是发射机维护检修工作的关键部位。掌握功放模块的MOS管故障诊断方法,有助于解决发射机功率放大器的故障,使功放模块正常工作。对于MOS管故障的诊断方法较多,各有优缺点,需要根据具体情况选择合适的方法进行故障诊断。对此,详细分析MOS管故障诊断方法、检测方法,为发射机维护人员提供一些参考。

MOS tube is the core component of power amplifier module of all solid state FM broadcasting TV transmitter.The amplification ability and output power of MOS transistors directly determine the output power of the transmitter,while the output power of the transmitter determines the coverage range of the transmitted signal and the size of the received field strength.The power amplifier unit is a key part of transmitter maintenance and repair work.Mastering MOS transistor fault diagnosis methods for power amplifier modules can help solve faults in transmitter power amplifiers and ensure normal operation of the power amplifier modules.There are many diagnostic methods for MOS transistor faults,each with its own advantages and disadvantages.It is necessary to choose a suitable method for fault diagnosis based on the specific situation.This article provides a detailed analysis of MOS transistor fault diagnosis and detection methods,providing some reference for transmitter maintenance personnel.