摘要
利用DDS并结合等精度频率测量原理实现了周期性信号的数字倍频。倍频时通过单片机测出输入信号频率,并根据倍频系数算出倍频信号频率,最后利用DDS来产生所需的倍频信号。对倍频的原理、信号倍频的准确度作了理论分析,并通过实验验证了设计的正确性。
Has realized the digital-frequency-multiplication of periodic signal based on the DDS and equal-precision frequency measurement. The MCU determines the input signal frequency and calculates the frequency-multiplication-signal＇s frequency according to the frequency multiplication number, and produces the frequency-multiplication-signal using DDS.The frequency multiplication principle and accuracy are analyzed, and has confirmed the design accuracy through the experiment.
出处
《微计算机信息》
2009年第1期141-142,122,共3页
Control & Automation
关键词
数字倍频器
等精度
频率测量
直接数字合成器
Digital Frequency-multiplier
Equal-precision
Frequency Measurement
DDS
