Design and Application of a Frequency Synthesizer Based on AD9959
Shaogang Dai · Dianzi qijian · 2008
AD9959 supplied by ADI Company is a 4-channel DDS chip with high sample rate as 500 Msample/S,each channel has dedicated 32 bit frequency tuning word,14 bit of phase offset,and a 10 bit DAC.Using its features of excellent synchronous,high frequency resolution and flexible control mode,designed a frequency synthesizer meeting the requirement of high precision Galileo/GPS pseudo satellite system.ADS software was introduced in the design to assist analyzing and simulating,this frequency synthesizer can meet the system demands at clutter suppression and phase noise.