基于FPGA和单片机技术的多波形信号发生器设计

Design of Signal Generator with Multi-Waveform Based on FPGA and Microcomputer on a Single Chip

基于直接数字频率合成(DDS)技术和单片机技术设计了一种高稳定性、高分辨率、振幅与相位可连续变化的多波形信号发生器。采用FPGA芯片EP1C3T144C8实现了直接数字频率合成。采用STC89LE52RC单片机作为控制核心。D/A转换电路采用DA9762作为数模转换器。系统输出频率在100Hz^20k Hz之间变化可调。输出信号的类型、振幅、相位与频率可以通过单片机设定。

A muhi-waveform signal generator with high stability, high resolution,continuous changeable amplitude an phase on the basis of FPGA and microcomputer on a single chip in this paper. The direct digital frequency synthesis （DDS） was competed by using FPGA chip EP1 C3T144C8. A microcomputer on a single chip was used as a control core of this system. D/A conversion was accomplished using DA9762 digit-analog converter chip. The frequency of output signal is adjustable in the range of 00Hz - 20kHz. The type, amplitude,phase and frequency can be set by using microcomputer on a single chip.