Patent ID: 8125258

Claim:
A phase synchronization device comprising: a sampling section that samples a phase-modulated continuous-time signal to generate a quantized signal; and a synchronization section that detects a reference phase synchronized with the phase of the quantized signal in a digital signal region, wherein the sampling section comprises: a sampling filter that converts the continuous-time signal into a discrete-time signal and applies filtering of low-pass characteristics to the discrete-time signal; and a one-bit quantizer that applies filtering of high-pass characteristics to the discrete-time signal that has passed through the sampling filter and outputs, as the quantized signal, a signal representing a time-dependent change in the discrete-time signal by the filtering, and the synchronization section comprises: a phase difference detector that calculates the phase difference between an inspection signal and the quantized signal; and a delay control circuit that feeds back the inspection signal to the phase difference detector at the timing set in consideration of a delay amount corresponding to the phase difference calculated by the phase difference detector.