Variable gain amplifier system

摘要

A CCD signal processing channel with input and output offset correction is offered. Integrators are positioned to provide correction at the input to a correlated double sampling circuit and at the output of a programmable gain amplifier. Gain control is provided for the programmable gain amplifier. The second integrator may be all digital or may combine analog and digital signals. The channel may also be constructed using a digital programmable gain amplifier. The digital programmable gain amplifier can be combined with an analog programmable gain amplifier in the signal processing channel.