Captured-image-signal processing method and apparatus and...

Details Captured-image-signal processing method and apparatus and... Captured-image-signal processing method and apparatus and...

2008-04-15

2008-04-15

Ometz, David (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

C348S691000, C348S693000, C348S696000, C348S697000

Reexamination Certificate

active

07358995

ABSTRACT:
An imaging apparatus includes a solid-state imaging device that outputs a captured image signal in current mode, which in turn is subjected to CDS processing in current mode by a current signal detector, thus suppressing FPN noise. A captured image signal output by the current signal detector is amplified by a programmable gain amplifier to a certain level, and the amplified signal is converted by a current-to-voltage transducer into a voltage signal. In a clamp circuit including a current-output differential amplifier and a current adder, the differential amplifier compares the voltage signal with a reference voltage from a reference voltage source and feeds back a clamp current to the current adder so that the difference between the voltage signal and the reference voltage becomes substantially zero. The current adder is required to simply add a signal current and the clamp current.

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