The normal idea to make up a digital controled oscillator (DCO)of the digital phase locked loop (DPLL)is to delete the pulses unwanted It need that the master clock frequency must be more faster than the output frepuency of the DPLL.

• 传统的数字锁相环 (DPLL)多采用吞脉冲的方法来实现DCO ,此方法要求工作频率远高于DPLL的输出频率。