Signal processing circuit, solid-state imaging device, and camera system

摘要

A signal processing circuit includes: a reference signal generating circuit that generates a reference signal of a ramp waveform of which a voltage value varies with the lapse of time by changing a current; and a signal processing unit including a plurality of processing sections that process the reference signal as a ramp wave and a potential of a supplied analog signal, wherein the reference signal processing circuit has a function of adjusting an offset of the reference signal by adjusting the current from the time of starting the generation of the reference signal or adjusting the level of the reference signal at least at the time of starting the generation of the reference signal.

主权项

1. A signal processing circuit comprising:
a reference signal generating circuit configured to generate a reference signal of a ramp waveform of which a voltage value varies with the lapse of time by changing a current; and a signal processing unit including a plurality of processing sections respectively configured to process the reference signal and a potential of a supplied analog signal, wherein the reference signal generating circuit is configured to adjust an offset of the reference signal by adjusting the current from the time of starting the generation of a ramp portion of the reference signal or to adjust the level of the reference signal at least at the time of starting the generation of the rams portion of the reference signal, and wherein the reference signal generating circuit adjusts the offset of the reference signal by a fixed amount for a predetermined period of time, wherein the predetermined period of time is substantially coextensive with the ramp portion of the reference signal.