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EP0796008A2
Expired / Lapsed
EP
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Digital camera with analog and digital clamp circuit
Assignee: Sanyo Electric Co Ltd
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Filing: 1997-03-11
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Granted: —
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Expires: 2017-03-11
Abstract
Abstract A digital camera includes a CCD imager, and a CCD output signal from the CCD imager is clamped in an analog clamp area by an analog clamp circuit, and then, converted into a digital signal by an A/D converter. The digital signal is thereafter applied to a clamp level calculation circuit which calculates a clamp level of the digital signal, whereby the digital signal can be subjected to digital clamping by a first subtraction circuit. <IMAGE>
Inventors
- 👤 Akio Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 13:24
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/14; H04N5/16; H04N5/18; H04N23/00; H04N23/80; H04N23/60; H04N23/667; H04N23/84; H04N23/843; H04N25/00; H04N25/10; H04N25/11; H04N25/13; H04N25/134; H04N25/40; H04N25/44; H04N25/447; H04N5/222; H04N5/262; H04N5/2628; H04N2209/00; H04N2209/04; H04N2209/041; H04N2209/042; H04N2209/045; H04N2209/046; H04N25/135; H04N25/136
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
87 words
In a digital camera having a CCD imager for outputting line signals, each of said line signals being clamped in an analog clamp area of said CCD imager by an analog clamp means and then converted into a digital signal, said digital signal being digital-clamped in a digital clamp area by a digital clamp means, the digital camera characterized in that: said analog clamp area is set such that both horizontal ends of said analog clamp area are positioned at the outside of said digital clamp area.
Claim 2
Dependent Claim
26 words
A digital camera as recited in claim 1, wherein said analog clamp area covers said digital clamp area at least with respect to a horizontal direction.
Claim 3
Dependent Claim
24 words
A digital camera as recited in claim 1, wherein said analog clamp area is set at a different area from said digital clamp area.
Claim 4
Dependent Claim
43 words
A digital camera as recited in claim 1 or 2, wherein, in a first photographing mode utilizing a whole area of said CCD imager, said analog clamp area and said digital clamp area are set at a rear edge of said line signal.
Claim 5
Dependent Claim
57 words
A digital camera as recited in claim 1 or 2, wherein, in a second photographing mode utilizing part of a whole area of said CCD imager including one vertical end and one horizontal end thereof, said analog clamp area and said digital clamp area are respectively set at said one vertical end and said one horizontal end.
References Cited (Backward Citations)
No citation records indexed.
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