数字信号源及其应用

本文提出了两种数字信号源的工程实现方法,即用8253与CD4046构成可编程的信号源;以及用数字频率合成器。并给出了信号源的工作原理、电路组成、基本参数选择和它们的工作特点。这两种信号源可与微计算机接口,具有较高的信号产生精度和频率稳定度。

Digital Signal Generator and Its application

This paper presents two methods for singal generation: 1. through a programmable signal generator made of 8253 counter/timer chip and CD 4046 micropower phase; 2. through a digital frequency synthesizer. The principles, circuit parameter selections of both signal generators are also described. The above generators can interface with microcomputers. They can generate signals of high precision and of high stability of frequency.