Amplification circuit, imaging device, and control method of amplification circuit

A decline in image quality that is caused by a variation of a gain in an amplification circuit is suppressed.The amplification circuit includes an amplification transistor, a cascode transistor, and a control circuit. The amplification transistor amplifies an input signal. The cascode transistor is...

Full description

Saved in:
Bibliographic Details
Main Authors Otani, Takehiro, Watanabe, Shinichi
Format Patent
LanguageEnglish
Published 22.03.2022
Subjects
AMPLIFIERS
BASIC ELECTRIC ELEMENTS
BASIC ELECTRONIC CIRCUITRY
CODE CONVERSION IN GENERAL
CODING
DECODING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
PICTORIAL COMMUNICATION, e.g. TELEVISION
SEMICONDUCTOR DEVICES
Online AccessGet full text

Cover

More Information
Summary:A decline in image quality that is caused by a variation of a gain in an amplification circuit is suppressed.The amplification circuit includes an amplification transistor, a cascode transistor, and a control circuit. The amplification transistor amplifies an input signal. The cascode transistor is configured to, in a case where a drain-source voltage between a drain and a source is higher than a predetermined voltage, supply a substantially-constant drain current to a reference potential line with a predetermined reference potential via the amplification transistor. Further, the control circuit is configured to, in a case where an initialization instruction is issued, control the drain-source voltage to be a value higher than the predetermined voltage.
Bibliography:Application Number: US201816971997