Patent ID: 6618459
Filing Date: 2003-09-09
Classification: H03L,H04L

Abstract:
A radio communication device comprising:a signal receiving circuit receiving a radio signal and generating a demodulated output signal and a signal indicative of a phase of received radio signal; a data-receiving clock; a data receiving circuit which receives the demodulated output signal in accordance with said data-receiving clock; a phase-difference detecting circuit which receives the signal indicative of a phase of received radio signal and said data-receiving clock and generates a phase difference output signal; a phase-difference correcting circuit which receives the phase difference output signal and makes a correction for a phase of said data-receiving clock in accordance with a phase difference between said received radio signal and said data-receiving clock; and a maximum correction establishing circuit which establishes in advance a maximum correction for a phase of said data-receiving clock, said phase-difference correcting circuit being controlled by the maximum correction establishing circuit to establish the correction for the phase of said data-receiving clock within the thus established maximum correction, wherein said phase-difference correcting circuit makes the correction for the phase of said data-receiving clock equal to said maximum correction, when the phase difference between said received radio signal and said data-receiving clock is equal to or greater than said maximum correction, and makes the correction for the phase of said data-receiving clock equal to the phase difference between the received radio signal and said data-receiving clock, when said phase difference is smaller than said maximum correction.