摘要
本设计以Altera公司的APEX FPGA器件为核心,采用直接数字频率合成技术(DDS),辅以必要的模拟与数字转换电路,形成一个精确调频发生器。本系统的主要特色:可以产生任意波形的信号,输出信号的频率可精确调整,且频率稳定度很高。本系统也可以实现扫频信号输出,且扫频起点、终点和步长均可调整。同时对输入模拟信号采集,并用Nios对采样数据处理实现全数字调频。
The system is designed to construct a Waveform Generator based on DDS, with FPGA of Altera Corporation, complimented by necessary analog and digital conversion circuit. The character of the system is as follow： the system can generate random wave signal, the frequency of output signal can be adjusted accurately, the stability of output frequency is very high. Also the system can export the swept signal with adjustable start-point, end-point and swept step. The extended application can gather the input analogy signal , and apply NIOS to deal with the sampling signal such that frequency modulation, frequency conversion function can be realized all in digital.
出处
《微计算机信息》
北大核心
2007年第04Z期223-225,共3页
Control & Automation
