Demodulator circuit for digital television and demodulation...

Details Demodulator circuit for digital television and demodulation... Demodulator circuit for digital television and demodulation...

2004-01-23

2009-06-16

Tran, Trang U (Department: 2622)

Television

Receiver circuitry

Demodulator

C348S725000, C348S731000

Reexamination Certificate

active

07548281

ABSTRACT:
An apparatus may include a sort circuit for receiving first and second baseband signals, where the sort circuit shifting frequencies of the first and second baseband signals. The apparatus may also include a removal circuit for receiving the shifted first and second baseband signals and for combining the shifted first and second baseband signals to provide a frequency-modulated signal, and a symbol timing restoration circuit for measuring a timing error in related symbols of the frequency-modulated signal, for generating an address selection signal that is proportional to the timing error, in response to a carrier restoration signal, and for indicating restoration of the carrier.

REFERENCES:
patent: 6067329 (2000-05-01), Kato et al.
patent: 6665355 (2003-12-01), Chen et al.
patent: 6842488 (2005-01-01), Oh
patent: 6882373 (2005-04-01), Hong et al.
patent: 7038730 (2006-05-01), Markman et al.
patent: 7061996 (2006-06-01), Kim
patent: 2001-086175 (2001-03-01), None
Korean Office Action with translation dated Dec. 14, 2004.

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