摘要
比较了在ＰＣＭ（脉冲编码调制）传输设备中传送数据时采用的电话和数据通路单元，肯定了采用数据通路单元的合理性，剖析了其实用电路，还介绍了引进设备中有关专用芯片。
Two types of channel unit, telephone and digital, used for PCM (pulse coded modulation)data transmission are compared , and the latter is justified. Its application circuit diagram is analysed in details. Key dedicated chips of imported equipment are introduced.
出处
《现代电力》
1994年第1期33-41,共9页
Modern Electric Power
