Method and apparatus for generating a frequency control signal

Details Method and apparatus for generating a frequency control signal Method and apparatus for generating a frequency control signal

2007-05-29

2007-05-29

Corrielus, Jean B. (Department: 2611)

Pulse or digital communications

Receivers

Automatic frequency control

C455S182200, C455S192200, C455S313000, C331S175000

Reexamination Certificate

active

10456528

ABSTRACT:
A receiver including a frequency converter which converts a frequency of a received signal according to a control signal to obtain a frequency-converted received signal, and an AFC (automatic frequency controller) which converts the frequency-converted received signal into a data converted signal, which compares respective phases of the data converted signal and a previous data converted signal to generate a first phase difference value, which compares respective phases of the data converted signal and the previous data converted signal to generate a second phase difference value, which generates a loop gain value according to the first and second phase difference values, and which generates the control signal according to the first phase difference value and the loop gain value.

REFERENCES:
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patent: 6490010 (2002-12-01), Shibuya et al.
patent: 6631174 (2003-10-01), Asahara et al.
patent: 6748037 (2004-06-01), Katoh et al.
patent: 6847688 (2005-01-01), Molnar et al.
patent: 6996156 (2006-02-01), Ono
patent: 2001-223610 (2001-08-01), None
patent: 2002-111541 (2002-04-01), None

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