Patent ID: 7852390
Filing Date: 2010-12-14
Classification: A01C,H04N

Abstract:
1. A photoelectric conversion device comprising: a plurality of pixel columns; a plurality of signal output lines, wherein through each signal output line electrical signals are read out from each of the pixels of the pixel column; and a plurality of amplification circuits, arranged repetitively, each of the amplification circuits corresponding, respectively, to each of the pixel columns for amplifying the electrical signals, wherein the plurality of amplification circuits include at least one constant current circuit, and wherein the amplification circuits are repetitively disposed extending in a predetermined direction, wherein each of the constant current circuits includes at least a field effect transistor and a common grounded wiring common to the plurality of constant current circuits, wherein a direction parallel to a channel length of the plurality of the field effect transistors is different from the predetermined direction of the plurality of the amplification circuits, wherein each amplification circuit further includes an input transistor having a gate receiving the electrical signal from the signal output line, and wherein a direction parallel to a channel length of the input transistors is different from the direction parallel to the channel length of the field effect transistor of the constant current circuit, and the channel length of the input transistor is different from the channel length of the field effect transistor.