PHOTOELECTRIC CONVERSION APPARATUS AND IMAGE CAPTURING SYSTEM

摘要

In a first sensitivity level, an AD converter performs AD conversion selectively using, in accordance with the level of the analog signal, any one of a first reference signal and a second reference signal that have mutually different slopes, and in a second sensitivity level that is different from the first sensitivity level, the AD converter performs AD conversion only using a third reference signal.

主权项

1. A photoelectric conversion apparatus in which sensitivity levels is settable, comprising:
a plurality of analog signal output units including a plurality of pixels and configured to output an analog signal in accordance with a signal produced in the plurality of pixels; and a plurality of analog-to-digital (AD) converters provided to correspond to the plurality of analog signal output units and configured to perform AD conversion by comparing a ramp signal with the analog signal output from the analog signal output units, wherein in a first sensitivity level, each of the plurality of AD converters performs AD conversion selectively using, in accordance with a level of the analog signal, any one of a first ramp signal and a second ramp signal that have mutually different slopes, and in a second sensitivity level that is different from the first sensitivity level, each of the AD converters uses only a third ramp signal as the ramp signal for performing the AD conversion.