FREQUENCY SYNTHESIZER AND PHASE SYNCHRONIZING CONTROL DEVICE BASED ON INITIAL TUNING VOLTAGE OFFSETTING

摘要

Disclosed are a frequency synthesizer and a phase synchronizing control device. A frequency synthesizer which includes a phase-digital detector, a charge pump, a loop filter, a voltage control oscillator, and a divider, includes an initial voltage setting device which calculates an initial voltage offset corresponding to the target frequency of the voltage control oscillator based on linear characteristic between a tuning voltage and a frequency.