Over-sampling A/D converting circuit

Details Over-sampling A/D converting circuit Over-sampling A/D converting circuit

2005-12-05

2009-10-06

Ometz, David L (Department: 2622)

Television

Image signal processing circuitry specific to television

A/d converters

C348S537000, C348S539000, C348S571000

Reexamination Certificate

active

07599006

ABSTRACT:
To provide an A/D converting circuit capable of improving an S/N ratio regardless of a color television system. An over-sampling A/D converting circuit according to an embodiment of the present invention includes: an A/D converter for over-sampling an analog video signal; a digital low-pass filter allowing passage of a signal component in a predetermined passing band out of the over-sampled signal; a down-sampling circuit for down-sampling the passed signal; and a color television system determining circuit for switching the passing band.

REFERENCES:
patent: 4745492 (1988-05-01), Kobayashi et al.
patent: 5157395 (1992-10-01), Del Signore et al.
patent: 5459520 (1995-10-01), Sasaki
patent: 6369857 (2002-04-01), Balaban et al.
patent: 2003/0063219 (2003-04-01), Bellers
patent: 62-287716 (1987-12-01), None
patent: 1999-001804 (1999-01-01), None
patent: 10-2004-0037199 (2004-05-01), None

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