Patent ID: 7791661

Claim:
An image signal sampling circuit for generating sampled signals from an image sensor, wherein said image sensor providing image signal source, comprising: two or more sampling column circuits connecting to said image sensor, wherein each sampling column circuit having a source column switch having a first end connecting to an output of said image sensor, and a second end connecting to a column read out unit and a first end of a capacitor, said column read out unit having a second end for outputting a sampled signal, said capacitor having a second end connecting to a first end of a ground column switch, said ground column switch having a second end connected to ground, and a between-column switch having a first end connected to the second end of the source column switch and a second end connected to a second end of a capacitor of a second sampling column circuit; and a control unit for controlling the source column switches, the ground column switches, and the between-column switches.