摘要
介绍用ＣＤ４０４６锁相环实现串行数据通信中信号频率调制和解调的电路原理，以及使用施密特触发器对解调波形进行整形、复原数字信号的电路和原理。该电路可用于不同计算机间的通信或对信号进行检测。
This paper explains the principle on how to use CD4046 phase locked loop to realize signal frequency MODEM circuit in serial digital communication and how to use Schmidt circuit to reform the demodulated waveform and recover the digital signals. These circuits can be used to communicate between different computers or to detect signals.
关键词
串行通信
锁相环
调频
解调
数据通信
serial communication,phase locked loop,frequency modulation,demodulation,Schmidt circuit
