Title:
SOLID-STATE IMAGING SENSOR AND IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/196079
Kind Code:
A1
Abstract:
[Problem] To shorten a settling time. [Solution] Provided is a solid-state imaging sensor being provided with a pixel circuit, an input transistor, a reference-side current source, a feedback circuit, a cascode transistor, and an amplifier. The pixel circuit generates an input voltage through photoelectric conversion. The input transistor has a source to which the input voltage is applied, and a drain from which an output voltage corresponding to the voltage is output between the source and a gate. The reference-side current source is connected to a reference node having a predetermined reference voltage and supplies a predetermined current. The feedback circuit includes a feedback capacitor that feeds a part of the predetermined current back to the gate of the input transistor and is connected between an output node from which the output voltage is output and the gate of the input transistor, a reference-side capacitor connected between the gate of the input transistor and the reference node, and an input-side auto zero switch connected between the gate of the input transistor and the output node. The cascode transistor is connected between the reference-side current source and the drain of the input transistor. An intermediate switch is connected between the feedback capacitor and the output node. The amplifier has a normal-phase amplifier that amplifies a signal output from the output node.
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Inventors:
NAKAGAWA DAISUKE (JP)
KANJANAVIROJKUL PARIT (JP)
KANJANAVIROJKUL PARIT (JP)
Application Number:
PCT/JP2022/001634
Publication Date:
September 22, 2022
Filing Date:
January 18, 2022
Export Citation:
Assignee:
SONY SEMICONDUCTOR SOLUTIONS CORP (JP)
International Classes:
H04N5/378
Foreign References:
| JP2011029726A | 2011-02-10 | |||
| JP2017038315A | 2017-02-16 | |||
| JP2015119340A | 2015-06-25 |
Attorney, Agent or Firm:
NAKAMURA Yukitaka et al. (JP)
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