Phase adjustment circuit and demodulation circuit

Details Phase adjustment circuit and demodulation circuit Phase adjustment circuit and demodulation circuit

2006-11-28

2006-11-28

Mis, David (Department: 2817)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

C360S029000, C360S049000

Reexamination Certificate

active

07142382

ABSTRACT:
A phase adjustment circuit includes: a carrier-wave-delay adjusting circuit for delaying an input carrier wave and outputting the delayed carrier wave, in accordance with phase information; and a phase-difference detecting/adjusting circuit for detecting a phase difference between an input signal and the delayed carrier wave, outputting, as the phase information, a value according to the detected phase difference, adjusting the delayed carrier wave such that the delayed carrier wave has a phase substantially coincident with a phase of the input signal, and outputting the resultant carrier wave as a phase-adjusted carrier wave. In a steady state, the phase-difference detecting/adjusting circuit outputs, as the phase information, a value indicating the presence of a phase difference.

REFERENCES:
patent: 3637936 (1972-01-01), Krause
patent: 4607360 (1986-08-01), Fukui
patent: 4631600 (1986-12-01), Fukui
patent: 4956720 (1990-09-01), Tomisawa
patent: 62-154886 (1987-07-01), None
patent: 5-260413 (1993-10-01), None
patent: 6-19898 (1994-03-01), None
patent: 2001-126413 (2001-05-01), None

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