Phase synchronization circuit and electronic apparatus

Details Phase synchronization circuit and electronic apparatus Phase synchronization circuit and electronic apparatus

2007-09-10

2009-11-10

Pascal, Robert (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Tuning compensation

C331S011000, C331S017000

Reexamination Certificate

active

07616067

ABSTRACT:
A phase synchronization circuit and an electronic apparatus equipped with the phase synchronization circuit are provided. The phase synchronization circuit includes an oscillation unit, a phase comparison unit, a loop unit, a drive unit, an oscillation control signal unit, and a gain characteristic information obtaining unit. In the phase synchronization unit, a compensation signal is generated based on the gain characteristic information obtained by the gain characteristic information obtaining unit at the time of the usual phase synchronizing operation, and the drive unit is controlled by the compensation signal so that a product of the input signal-oscillation frequency conversion gain at the time of actual operation and the drive signal with which the drive unit drives the loop filter unit is constant.

REFERENCES:
patent: 6998922 (2006-02-01), Jensen et al.
patent: 7298219 (2007-11-01), Dosho et al.
patent: 7301414 (2007-11-01), Hino
patent: 2005/0237125 (2005-10-01), Hino
patent: 2006/0145767 (2006-07-01), Vaananen
Zhi-Ming Lin et al., “A CMOS Voltage-Controlled Oscillator With Temperature Compensated”,The Second IEEE Asia Pacific Conference on ASICs, Aug. 28-30, 2000, pp. 85-86.
Soon-Seob Lee et al., “Process-and-Temperature Compensated CMOS Voltage-Controlled Oscillator for Clock Generators”,Electronics Letter, vol. 39, No. 21, Oct. 16, 2003, pp. 1-2.
Takashi Morie et al., “A -90dBc@10kHz Phase Noise Fractional-N Frequency Synthesizer With Accurate Loop Bandwidth Control Circuit”,Symposium on VLSI Circuits Digest of Technical Papers, pp. 52-55, 4-900784-01-X, Jun. 2005.
Kun-Seok Lee et al., “Fast AFC technique Using a Code Estimation and Binary Search Algorithm for Wideband Frequency Synthesis”,Proceedings of ESSCIRC, Grenoble, France, 2005, pp. 181-184, Sep. 2005.

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