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。
The test results showed that maximum master clock frequency up to 3 MHz and greater or equal 166 ns pulse width valid. 测试结果表明:该模数转换器的最高工作时钟频率可达3MHz;工作时钟的脉冲宽度只要不小于166ns就是有效的。