SOLID-STATE IMAGING APPARATUS

摘要

: This invention relates to a solid-state imaging apparatus wherein photo signals are read out through MOS type FETs from photosensors, such as photodiodes, arrayed in two dimensions in large numbers. The invention improves the signal-to-noise ratio of the output signal by reducing or eliminating noise components mixed in the photo signal. Analysis of the noise components has revealed a correlation in which a noise component of a certain polarity develops again with the opposite polarity after a period that is shorter than one horizontal scanning period by the duration of one horizontal scanning pulse. To take advantage of this correlation, the apparatus provides a processing circuit that includes a delay circuit and an adder circuit to act together to cancel the noise.