Video signal processing circuit and computer system
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United States of America Patent
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Sep 16, 2003
Grant Date -
Jun 20, 2002
app pub date -
Feb 21, 2002
filing date -
Oct 16, 1997
priority date (Note) -
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Abstract
A video signal processing circuit, in which a horizontal synchronizing signal is separated from an input analog video signal by a synchronism separating circuit, whether a 'H' period of the horizontal synchronizing signal continues for more than a prespecified period of time or not is checked by a synchronizing signal monitoring counter, and power supply to an A/D converter is controlled thereby according to a result the confirmation.
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