Study of Multi-channel Signal Source Based on FPGA

Abstract

Studying on the structure and function of signal source, combined with the features of the current signal source and the needs for multi-channel signal source, a design of a multi-channel signal source is given in this paper. It is realized by the integrated DDS circuit in the FPGA chip, high-speed DA conversion chip, amplifying circuit and filter circuit etc. It has been proved that it can generate standard sin signal which has adjustable frequency, amplitude and phase. The frequency range is 0~125M Hz, amplitude resolution 0.1V and phase resolution π/512.