Processing circuit for processing horizontal and vertical...

Details Processing circuit for processing horizontal and vertical... Processing circuit for processing horizontal and vertical...

2005-04-07

2009-08-18

Natnael, Paulos M (Department: 2622)

Television

Basic receiver with additional function

Multimode

Reexamination Certificate

active

07576803

ABSTRACT:
A processing circuit for simplifying a plurality of types of synchronization signals into a single type of signal is described. The processing circuit has a first polarity converter, a second polarity converter, an extraction circuit, a removal circuit, a detection circuit, and a selection circuit. The extraction circuit extracts a vertical synchronization composition from an inputted synchronization signal on a first line. When an inputted vertical synchronization signal exists on a second line, the selection circuit outputs the inputted vertical synchronization signal, and when the inputted vertical synchronization signal doesn't exist on the second line, the selection circuit outputs the vertical synchronization composition extracted from the inputted synchronization signal.

REFERENCES:
patent: 4894719 (1990-01-01), Moon et al.
patent: 5091774 (1992-02-01), Lovely et al.
patent: 5097334 (1992-03-01), Shin
patent: 6064443 (2000-05-01), Lee
patent: 4-013375 (1992-01-01), None

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