ASIC Realization of High Speed Direct Digital Frequency Synthesizer Based on CORDIC Algorithm
Kaixiong Su · Modern Electronic Technique · 2005
This paper analyses a ASIC method that realizes the high speed and high precision Direct Digital Frequency Synthesizer (DDS) with the CORDIC (Coordination Rotation Digital Computer) algorithm based on vector rotation. Firstly, this paper explains how the algorithms work during producing sine and cosine signal. Then a toplayer circuits′ structure of Numeric Controlled Oscillator (NCO) in FPGA is presented, and a pipeline design is introduced according to the characteristic of the algorithm.