Signal Generator Based on Direct Digital Synthesis Techniques

This paper describes a design of signal generator based on direct digital synthesis technique (DDS). According to the basic principles of DDS using Matlab/DSP Builder establish DDS model, then compiling by the SignalCompiler tools and generating VHDL code. Finally download the relevant documents to the field programmable gate array (FPGA) chip EP2C5Q208C8N. EP2C5Q208C8N and digital-analog chip DAC908, high-speed operational amplifier THS4001 together to complete the signal generator’s hardware design. The system can output sine wave, square wave, triangle wave, phase shift keying (PSK), amplitude shift keying (ASK) and frequency shift keying (FSK). It’s stable, reliable and fairly practical.