Method and Application of Spurious Rejection of DDS
Yang Jian-yong, Liu Hongwei · Computer & Network · 2010
This paper introduces and simulates the method of phase-shake to the effect of spurious rejection by analyzing two main origins of spurious:quantity-error and phase-truncation,starting with the internal principle of direct digital frequency synthesizer (DDS) circuit.Combining with phase locked loop technology(PLL),it also introduces the optimization method of DDS+PLL,starting with the external principle of DDS.The engineering practice proves that the ideal output signal with low spurious and small step can be obtained by using this method.