Phase locked loop circuit for frequency synthesizer, has control unit connected to divisor and designed for controlling divisor exhibiting comparator function and multiplexer designed for phase quantization and output feedback signal

摘要

The circuit has a phase detector (303) supplying a reference frequency signal and a feedback signal. A charge pump (304) is connected with the phase detector. An oscillator (405) is connected with the charge pump. A multiplexer (420) is connected with the oscillator and the phase detector and receives a selected signal. The multiplexer is designed for phase quantization and outputting the feedback signal. A control unit (407) is connected to a divisor (406) and designed for controlling the divisor exhibiting a comparator function.