关键词: 直接数字频率合成, 四通道, CORDIC, DAC

Abstract: Based on the principle of direct digital synthesis(DDS),a direct digital frequency synthesizer with four channels is designed and implemented,which integrates four channels of DAC,and the highest working frequency is 500 MHz.The principle of CORDIC algorithm to realize phase amplitude conversion is analyzed and the algorithm is improved to reduce the power consumption of the whole circuit.

Key words: direct digital synthesis, four channels, CORDIC, DAC