Abstract:

The threephase signal generator has DDS as its core and generates sine,square and triangle wave and sawtooth signal in the Alteras Cyclone Ⅱ EP2C8T144C8.It controls the frequency and phase difference of the waveform with PIC18F4550.MCU controls the waveform amplitude by changing the reference voltage of DAC902 through DAC0832.The waveform is exported after amplification and filtering.Waveform parameters can be input and output through the touch screen and liquid crystal.Test results show that the system has high accuracy and good stability.

Key words: FPGA;threephase;signal generator;DAC902