Patent ID: 6775082
Filing Date: 2004-08-10
Classification: G11B,H03L

Abstract:
A digital VFO phase control device comprising:a counter for generating an output signal having a phase relationship with an input signal of said digital VFO phase control device, phase difference detection means for detecting a phase difference between the input signal and the output signal, first correction value output means for outputting a correction value for correcting the phase of the output signal based on the phase difference detected by said phase difference detection means, second correction value output means for outputting a preset correction value for correcting a the phase of the output signal, comparison means for detecting whether a counter value counted by said counter is within a predetermined range, and correction value selection means for selecting one of the correction value outputted by said first correction value output means and the correction value outputted by said second correction value output means based on the comparison result of said comparison means, and controlling the phase of the output signal utilizing the selected correction value.