Patent ID: 9749570
Date: 2017-08-29
CPC Classifications: H04N

Claim:
1. An imaging apparatus, comprising: a plurality of pixel circuits arranged in matrix having rows and columns, each being configured to generate an image signal by photoelectric conversion; first readout lines arranged for respective columns, through which image signals output from the plurality of pixel circuits are transmitted; column circuits arranged for the respective columns, to which the image signals are input from the first readout lines; current sources included in the column circuits in the respective columns; a driving circuit configured to output column control signals for switching between a current supplying state and a current non-supplying state of the current sources included in the column circuits in the respective columns; at least one second readout line to which the image signals output from the column circuits in the respective columns are input in response to the column control signals; switches each having one terminal and another terminal; and a switch control circuit configured to output switch control signals for respectively controlling the switches to be turned on or off, wherein each of the one terminals of the switches is connected to corresponding second readout line and each of the another terminals of the switches is connected commonly to an output line, and wherein, in a period in which the switch control signals for respectively controlling the switches to be turned on are output, a number of the current sources controlled to be in the current supplying state by the driving circuit is constant, and some current sources are controlled to be in the current supplying state while others of the current sources are controlled to be in the current non-supplying state.