Patent ID: 9049389
Filing Date: 2015-06-02
Classification: H03F,H03G,H04N

Abstract:
1. An imaging apparatus comprising: a pixel configured to generate a signal by photoelectric conversion; an amplifier circuit configured to amplify the signal from the pixel at a set gain; an AD converting unit; and a correcting unit, wherein the AD converting unit compares an output signal from the amplifier circuit after reset of the pixel with a reference signal which changes with time, to output a first digital value, sets the gain of the amplifier circuit at a first gain when the output signal from the amplifier circuit at a non-reset state of the pixel is larger than a threshold, sets the gain of the amplifier circuit at a second gain larger than the first gain when the output signal from the amplifier circuit at the non-reset state of the pixel is smaller than the threshold, and after setting the gain of the amplifier circuit at the first or second gain, compares the output signal from the amplifier circuit at the non-reset state of the pixel with the reference signal which changes with time, to output a second digital value, and when a resolution of the first digital value is different from a resolution of the second digital value, the correcting unit corrects the difference of the resolutions.