Patent ID: 9413993
Filing Date: 2016-08-09
CPC Classification: H04N

Claim Text:
1. A solid-state imaging device comprising: a pixel unit in which a plurality of pixels are arranged in a matrix; a plurality of vertical common signal lines each of which is provided for a corresponding one of columns of the plurality of pixels, and reads signals of pixels in the corresponding column; and a column constant current source which supplies a current to the plurality of vertical common signal lines, wherein the column constant current source comprises: a plurality of load transistors each having a source terminal and a drain terminal one of which is connected to one of the plurality of vertical common signal lines and the other of which is grounded; a constant voltage supply unit which includes a current source transistor and supplies a voltage to gate terminals of the plurality of load transistors; and a first multi-stage sample and hold circuit in which sample and hold circuits for sampling and holding the voltage are connected in multiple stages, the first multi-stage sample and hold circuit stabilizing the voltage which is supplied to the gate terminals of the plurality of load transistors, wherein the solid-state imaging device further comprises a reference voltage source which includes a reference current source and supplies a voltage to a gate terminal of the current source transistor, and the gate terminal of the current source transistor and the reference voltage source are connected to each other via the first multi-stage sample and hold circuit.