The New Design of a Rom-less Pipelining DDS
Zhang Changge · Modern Electronics Technique · 2008
This paper describes the design of a Rom-less Direct Digital Frequency Synthesizer.This design dispenses with Rom,which mainly limits the design of DDS,but use SIN function polynomial approximation directly generating.Realizes the design of Rom-less DDS in Xilinx′s FPGA(XC2V3000-ff1152-4),the digital part of it can be pipelined,and this method attaches the Spurious Free Dynamic Rang(SFDR) about-83 dBc.Comparing with the traditional method,the new design uses only 40% of FPGA resources.