Patent ID: 7508427
Filing Date: 2009-03-24
Classification: G11C,H03F,H03G,H04N

Abstract:
1. An image processing system, comprising: an input for receiving an input signal; a correlated double sampler (CDS) for receiving the input signal, sampling the input signal, amplifying the input signal with a first gain, and providing an output signal, the CDS comprising an amplifier for amplifying the input signal with the first gain, the first gain being settable to one of a plurality of first levels based on a digital input signal; and a programmable gain amplifier (PGA) for receiving the output signal from the CDS and amplifying the received output signal, the PGA comprising a second amplifier for amplifying the received output signal with a second gain, the second gain being settable to one of a plurality of second levels based on the digital input signal, each of the first levels being divided into the second levels, and an overall gain of the system being determined by a combination of the first gain of the CDS and the second gain of the PGA.