摘要
与传统的频率合成方法相比,DDS合成信号具有频率切换时间短、频率分辨率高、相位变化连续等诸多优点。针对CO激光检测系统设计中要求信号源四路波形同步异频发生,且有移相、倍频、波形叠加等要求,系统在信号发生部分用到了FPGA器件。选用Altera公司的FPGA芯片EP2C8Q208C8进行设计。经过电路设计和模块仿真,验证了设计的正确性。由于FPGA的可编程性,使得修改和优化DDS的功能非常快捷。
to the traditional method of frequency synthesis, DDS synthesized signan has such adventages, as short time of frequency switching, high frequency resolution, phase change continuously and so on. In the design of the CO laser detection system, the signal generator is required to output four different fxequettey waves at the same time, and their digital frequency, phrase and magnitude daould be flexibly adjustable, so the sigrud generator of the system uses the FPGA device and the design uses Altera＇ s FPGA - based chip EP2CSQ208CS. Aftex designing and testing circuit, it illustrates the validity of DDS.As the advantage of the pmgranmable of FPGA,It is convenient to modify and optimizc the function of DDS.
出处
《工业安全与环保》
北大核心
2011年第12期20-21,31,共3页
Industrial Safety and Environmental Protection
