基于可编程器件的PCM基群帧同步提取的研究

Research of drawing PCM frame synchronous pulse based on EPM7064SCL44-5 device

首先分析了PCM帧同步脉冲提取的一般性原理.在此基础上,针对复杂可编程器件的特点提出了一种新的帧同步脉冲提取的实现方法;在Quartus 2.1开发软件环境下,应用VHDL语言,在复杂可编程器件EPM7064SCL44-5上,实现了所提出的设计.该系统将所有的硬件电路集成在1个芯片上,其功能经过仿真验证,结果与预期的帧同步脉冲输出的时间间隔相一致.该系统可以在不改变整体结构的基础上,进行升级和维护.

This paper introduces a new design of drawing PCM frame synchronous pulse based on complex programmable logical device（CPLD）.Firstly,the principle about drawing PCM frame synchronous pulse is analyzed.Then,a new design about drawing PCM frame pulse is proposed and fulfilled on the In-system programmable device EPM7064SCL44-5 of ALTERA Company under the environment of Quartus2.1.Its function had been tested and verified.The conclusion is consistent with predicted frame pulse of PCM.This system can be easly maintainedand expanded.