单片机控制的直接数字频率合成器

A Direct Digital Frequency Synthesizer Controlled by the Single Chip Microcomputer

直接数字频率合成是一种新的频率合成技术；它由相位累加器、只读存贮器、D／A转换器及低通滤波器组成。本文介绍了一种用中、大规模集成电路实现直接数字频率合成器的方法，该直接数字频率合成器用8031单片机作相位增量控制器，所需频率直接从键盘敲入，频率值同时在数码显示器上显示。

The direct digital frequency synthesis(DDS) is a new frequency synthesis techniques. It consists of the phase accumulator,ROM,D/A converter and low frequency band filter. This paper presents a method of implementing DDS by MSI and LSI. The 8031 single chip microcomputer is used as phase increment controller of DDS. The frequency value is entered directly by keyboard, and is displayed in the LED.