Patent ID: 6783073
Filing Date: 2004-08-31
Classification: H04N

Abstract:
A semiconductor integrated circuit device for use with a solid state image pickup device, the semiconductor integrated circuit device comprising:an external input terminal arranged to be coupled to receive an output signal of the solid state image pickup device; a correlated double sampling amplifier having an input coupled to the external input terminal and an output; a gain control amplifier having an input coupled to the output of the correlated double sampling amplifier and an output; an A/D converter having an input coupled to the output of the gain control amplifier and an output, that provides a video signal; an external output terminal coupled to an output of the A/D converter; and an offset cancelling circuit which applies to the input of the correlated double sampling amplifier an offset cancelling voltage to cancel an offset voltage corresponding to a difference voltage between a black level in a feedthrough period of the solid state image pickup device in a state where the solid state image pickup device is optically interrupted and a signal level in a charge signal output period.