摘要
本文介绍了使用D／A转换器合成电压波形的原理。由D／A转换器直接输出的电压波形是需合成波形的NRZ采样波形，为了得到所需波形，必须采用信号恢复电路。本文介绍了信号恢复的方法，并给出了一台实用的数字合成式波形发生器的设计思路。
In this paper, the principle of using D/A (digitavanalog) converter combining voltage waveform is described. The direct output of D/A is the NRZ(no return zero) sample of the needs voltage waveform. to get the needs voltage waveform must use signal recover circuit. The means of signal recover is introduced. A useful waveform generator is designed.
关键词
波形发生器
锁相环
数字合成式
数/模转换器
sample, sample-law, signal recover, low pass filter, single chip computer, phase-locked loop
