语音信号采集系统及其与PC/XT机的接口电路的设计

The Design of Speech Signal Data Collection System and Interface Circuit With a PC/XT Computer

本文用AD574A模数转换集成块设计了语音信号来集系统，该系统由PC／XT机控制作A／D变换，并由PC／XT机对A／D转换的语音数据用二维作图软件作出语音信号波形图，并且在屏幕上显示转换结果。最后，还对系统性能进行硬件和软件调试，证明了系统的可行性。

In this paper,we design speech signal data collection system with an analogue -todigital convertion integrated circuit device AD574A. Analogue -to -digital convertion iscontrolled by a PC/XT computer in the system. And convertion result is sent to a PC/XTcomputer to display. We make a plot of speech signal wave with GRAPHER software in aPC/XT computer. At last,the performance of the system is tested by circuits and software. The result show that the system works well.