Digital camera with analog and digital clamp circuit

Details Digital camera with analog and digital clamp circuit Digital camera with analog and digital clamp circuit

1997-03-07

2000-12-05

Garber, Wendy

Television

Camera, system and detail

Combined image signal generator and general image signal...

348243, H04N 5217

Patent

active

061574074

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.

REFERENCES:
patent: 4652927 (1987-03-01), Hashimoto
patent: 4740828 (1988-04-01), Kinoshita
patent: 4910599 (1990-03-01), Hashimoto
patent: 5448306 (1995-09-01), Koyama
patent: 5612739 (1997-03-01), Maki et al.
patent: 5642162 (1997-06-01), Maki et al.
patent: 5717457 (1998-02-01), Morimoto
patent: 5717459 (1998-02-01), Maki et al.

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