Video signals clamping circuit for maintaining DC level of video signals
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 23, 1994
Grant Date -
N/A
app pub date -
Apr 7, 1992
filing date -
Apr 9, 1991
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A video signal clamping circuit capable of maintaining a DC level of a digital video signal at a fixed level, in which a pedestal level in a vertical blanking period of the digital video signal after an A/D conversion is sampled, and an average value of a plurality of sampling data in a plurality of fields is calculated by an average value calculator. The average value is compared with a predetermined clamp level reference value by a comparison output circuit, and depending on the comparison result, a signal either added or subtracted by a certain width to or from an output signal of a predetermined period before is output for automatically controlling a clamp voltage.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully