Patent ID: 9549135
Date: 2017-01-17
CPC Classifications: H04N

Claim:
1. A solid-state imaging device comprising: an imaging region including a plurality of unit cells arranged in rows and columns, each of the unit cells including at least one light receiving unit, a transfer transistor which transfers a signal charge photoelectrically converted by the at least one light receiving unit, and an amplifying transistor which outputs an amplified signal corresponding to an amount of the signal charge; a plurality of column signal lines each connected to a source electrode of the amplifying transistor, for receiving an output signal from the amplifying transistor; a pixel power supply line connected to a drain electrode of the amplifying transistor, for supplying a power supply voltage to the amplifying transistor; a plurality of constant current source transistors each connected to a different one of the column signal lines; and a bias circuit which controls an amount of current to be supplied to each of the constant current source transistors, based on a variation in the power supply voltage.