Method to suppress spurious of DDS circuit
Guo Bao-feng · China Measurement & Test · 2012
In order to suppress the output spurious of the direct digital frequency synthesizer(DDS) circuit,the authors analyzed the effect of DAC nonlinear on the output spurious,and on the basis,gave a spurious source model for DDS circuit.A program was proposed to choose a reasonable output frequency band orderly to reduce the DDS output spurious,and the simulation instances were given.The experimental results indicated this program could effectively reduce the DDS output spurious,and played a good role in improving the quality of the output signal of the DDS circuit.It was an important guiding significance in the DDS circuit design.