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PHASE LOCKED LOOP WITH DYNAMIC LOOP BANDWIDTH AND PRODUCING METHOD FOR OUTPUT SIGNAL SYNCHRONIZED WITH REFERENCE SIGNAL USING DYNAMIC LOOP BANDWIDTH
PHASE LOCKED LOOP WITH DYNAMIC LOOP BANDWIDTH AND PRODUCING METHOD FOR OUTPUT SIGNAL SYNCHRONIZED WITH REFERENCE SIGNAL USING DYNAMIC LOOP BANDWIDTH
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机译：动态环带宽的锁相环及利用动态环带宽进行参考信号同步的输出信号的产生方法
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摘要
PURPOSE: A phase-locked loop which has a dynamic loop bandwidth and an output signal generation method using the dynamic loop bandwidth are provided to generate an output signal synchronized to a reference signal using the dynamic loop bandwidth and the phase-locked loop which has the dynamic loop bandwidth. CONSTITUTION: A phase frequency comparator(21) generates a pulse for synchronizing an output signal to a reference signal. A loop bandwidth controller(22) dynamically controls a loop bandwidth corresponding to the generated pulse. A charge pump(23) dynamically outputs an up/down current according to the controlled loop bandwidth. A voltage controlled oscillator(25) generates an output signal by changing control voltage. A loop filter(24) eliminates noise of the control voltage. A frequency divider(26) generates a feedback signal by dividing a frequency of the output signal with a fixed rate.
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