Patent ID: 6587143
Filing Date: 2003-07-01
Classification: G11C,H04N

Abstract:
A correlated double sampler circuit which operates cyclically to process a raw sensor output signal from a CCD image sensor to generate an image signal indicative of a sensed image, said circuit including:an input node coupled to receive the raw sensor output signal; a first amplifier having two input terminals and two output terminals; and switch and capacitor circuitry comprising switches and capacitors but not an amplifier, wherein the switch and capacitor circuitry is coupled between the input node, the input terminals of the first amplifier, and the output terminals of the first amplifier, the switch and capacitor circuitry is coupled to receive a first set of control signals followed by a second set of control signals during each cycle of operation of the correlated double sampler circuit, and the switch and capacitor circuitry is configured to operate cyclically during processing of the raw sensor output signal such that a portion of the image signal generated in response to the first set of control signals is indicative of the value of one pixel of the image and a subsequent portion of the image signal generated in response to the second set of control signals is indicative of the value of a next pixel of the image.