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一、前言锁相技术起源于三十年代。它首先应用于锁相接收机及电视机扫描电路,锁相接收机能把深埋在噪声中的信号提取出来。随着电子技术的发展。它在航天技术,微波通讯,现代雷达,广播电视,遥测遥控,精密测量仪表等方面得到广泛的应用。目前,国内应用锁相技术也日趋发展,如锁相倍频技术在低速精密转台速率系统中的应用,用锁相36倍频来提高双频激光干涉仪的测量精度和分辨率,用锁相伺服系统来控制和驱动摄影机,国内还制成了单片模拟集成锁相环的集成电路等。总之,锁相技术的应用将越来越广
First, the foreword Phase-locked technology originated in the thirties. It is first applied to the phase-locked receiver and television scanning circuit, the phase-locked receiver can extract the signal buried in the noise. With the development of electronic technology. It is widely used in space technology, microwave communication, modern radar, radio and television, telemetering and remote control, precision measuring instruments and so on. At present, the application of phase-locked technology is also growing in China. For example, the application of phase-locked frequency-doubling technology in low-speed precision turntable speed system, the phase-locked 36 times frequency is used to improve the measurement precision and resolution of dual-frequency laser interferometer, Servo system to control and drive the camera, the domestic has also made a monolithic analog integrated PLL integrated circuits. In short, the application of phase-locked technology will be more and more widely