本文将硬件电路与软件编程功能相结合,设计了一种新的信号发生器实现方法,以FPGA作为主要控制核心,通过搭建波形重构电路、模拟开关选通电路、矩形波输出控制电路实现了32路模拟信号并行输出,其中,利用ADG333A模拟开关极大地减少了方波信号输出的边沿时间。实验结果表明,该信号发生器具有输出精度高、输出频率宽、信号稳定可靠等优点,现已广泛应用于航天设备的地面单元测试中。

In this paper,the hardware circuit and software programming function are combined to design a new signal generator implementation method,with FPGA as the main control core,by building waveform reconstruction circuit,analog switch selection circuit,rectangular wave output control circuit to achieve 32 analog signal parallel output.Using ADG333A analog switch can greatly reduce the edge time of square wave signal output.The experiment results show that the signal generator has the advantages of high output precision,wide output frequency,stable and reliable signal,and has been widely used in the ground unit test of aerospace equipment.