基于D/A参考电压调幅的信号发生器设计与实现  

Design of signal generator based on the amplitude modulation of D/A reference voltage

作　　者：王晓飞[1] 张伏江[1] 李东[1] 何昭[2] 

机构地区：[1]北京信息科技大学光电学院,北京100192 [2]中国计量科学研究院电磁所,北京100013

出　　处：《电子技术应用》2013年第4期52-54,共3页Application of Electronic Technique

基　　金：国家科技支撑计划课题资助项目(2011BAI02B04)

摘　　要：信号发生器以FPGA为核心器件，采用直接数字频率合成（DDS）技术，其信号幅度由D／A芯片THS5661控制，通过控制D／A芯片的参考电压来控制信号幅度的输出。该方案可实现多种信号波形的幅值调节，调节范围为0～±5V，分辨率为0．1V，并且可以实现信号频率和相位的调节。Signal generator based on FPGA uses the direct digital synthesis technology. Its signal amplitude is controlled by D/A THS5661. We can control the output of the signal through controlling the reference voltage of D/A. This scheme can realize a vari-ety of signal waveform amplitude adjustment. The adjusting range of signal amplitude is 0～±5 V and the resolution is 0.1 V. Its frequency and phase also can be adjusted.

关 键 词：数 模转换 参考电压 现场可编程门阵列 DDS 

分 类 号：TN792[电子电信—电路与系统]