基于CPLD和单片机的低频信号源设计

Design of Low Frequence Signal Source Based on CPLD and SCM

介绍了一种应用直接数字频率综合器(DDS)技术,基于可编程逻辑器件(CPLD)和单片机设计的低频信号源。该信号源体积小、质量轻、成本低,可以方便、可靠地产生正弦信号、脉冲信号、锯齿波、三角波等常用周期信号,能够满足大部分试验和科研过程中的需求。同时,还可以与计算机进行配合,适当添加一定的高级语言编程,即可产生任意波形的周期信号。对系统方案的原理和组成进行了详细说明,对系统的指标参数进行了数据分析,表明该方案实用性强,性能优良。

According to the technology of direct digital synthesis（DDS）, a kind of low frequence signal source was introduced based on the Complex Programmed Logical Device（CPLD） and Single Chip Micyoco（SCM）. The Siqndl source has little volume, low weight and low cost, and it can produce some routine periods source, such as sine wave, pulse wave, saw tooth wave and triangle wave. It can fulfil the demand of the mostly occasion of experiment or scientific research. Cooperated with computer, it can produce the period souree of random wave when some advanced language program was added. It has given the detailed explain of the principle and compose of system scheme, and analyzed the parameter of the system target based on the data. As a conclusion, the scheme has better practicability and excellent performance.