Abstract:

This project adopts the DDS(Direct Digital Synthesis) technology to design a high-precision three-channel phase-adjustable function signal generator,with external D/A devices and AFS600 mixed-signal FPGA of FUSION Series manufactured by Actel Corporation.This function signal generator transmits parameters to the FPGA through the serial port,implementing the Synthesis operation of all kinds of signals,with the MCU,LCD screen and keyboard as man-machine interface.With the High-speed D/A Converter and signal conditioner,this signal generator is capable of desired high-precision phase-adjustable function signal outputs,such as sine,triangle,sawtooth,and PWM signals.All the functions mentioned above are tested,which show that they meet the design requirements.

Key words: FPGA;DDS;three channel;phase