PSD在电话交换设备用户信号发生器中的应用

Application of PSD in user signal generator of portable telephone switch

本文介绍了现场可编程外围芯片PS0511B1在电话交换设备用户信号发生器中的应用。讨论了由PSD的定时器／计数器产生双音频信号的实现方法和由PSD管理的键盘。

This paper introduces the application ofPSD511B1 in a user signal generator of portabletelephone switch. It is introduced particularly for arealizing method of double audio frequency by timerlcounter of PSD, and keyboard scan by PSD is alsointroduced.