Digital television

Details Digital television Digital television

2011-02-15

2011-02-15

Tran, Trang U (Department: 2422)

Television

Receiver circuitry

Sound circuit

C348S678000, C348S736000

Reexamination Certificate

active

07889282

ABSTRACT:
A digital television combination integrated circuit is employed which includes a video signal D/A converter which converts a digital video signal to an analog video signal, and an audio signal D/A converter which converts a digital audio signal to an analog audio signal; there are provided a level shift circuit which extracts a luminance signal in the video signal which is outputted from the video signal D/A converter, and a low pass filter which extracts the DC component of the output signal of this level shift circuit; and the output signal of this low pass filter is supplied as a control voltage signal for gain control of an audio amplification circuit.

REFERENCES:
patent: 6147713 (2000-11-01), Robbins et al.
patent: 6476878 (2002-11-01), Lafay et al.
patent: 6678011 (2004-01-01), Yanagi et al.
patent: 6903781 (2005-06-01), Tanigawa et al.
patent: 7039941 (2006-05-01), Caporizzo et al.
patent: 7692726 (2010-04-01), Greenberg
patent: 08-289224 (1996-11-01), None

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