频率比较器比较基准时钟和输出时钟的频率，并输出频率比较信号。
A frequency comparator compares the frequency of a reference clock with that of an output clock and outputs a frequency comparison signal.
相位比较器比较基准时钟和输出时钟的相位，并输出相位比较信号。
A phase comparator compares the phase of the reference clock with that of the output clock and outputs a phase comparison signal.
相位频率检测器比较基准时钟信号和反馈时钟信号从而在一个或更多个输出信号中生成脉冲。
A phase frequency detector compares a reference clock signal to a feedback clock signal to generate pulses in one or more output signals.
时钟或者选通信号用于比较器、递增-递减计数器102和数模转换器100的同步操作，以便避免这些部件竞争。
A clock or a strobe signal is used to synchronise operation of the comparator, the up-down counter 102 and the digital to analog converter 100 so as to avoid these components racing.
时钟或者选通信号用于比较器、递增-递减计数器102和数模转换器100的同步操作，以便避免这些部件竞争。
A clock or a strobe signal is used to synchronise operation of the comparator, the up-down counter 102 and the digital to analog converter 100 so as to avoid these components racing.
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