A photoelectric conversion circuit, a photoelectric conversion device, electronic equipment, and a photoelectric current limiting method of a photoelectric conversion circuit

Title:

A photoelectric conversion circuit, a photoelectric conversion device, electronic equipment, and a photoelectric current limiting method of a photoelectric conversion circuit

Document Type and Number:

Japanese Patent JP6115343

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To provide a photoelectric conversion circuit that allows increasing operating speed as compared to conventional techniques.SOLUTION: A photoelectric conversion circuit includes: a phototransistor 1 outputting an optical current corresponding to the magnitude of incident light; a MOS transistor 3 outputting the optical current to a bias line at the time of standby; and a MOS transistor 2 outputting the optical current to an output line at the time of reading. The photoelectric conversion circuit limits the optical current to be outputted to a predetermined limit current value by using saturation drain currents of the MOS field-effect transistors 2 and 3. The limit current value is set by setting an inter-gate-source voltage applied to each gate of the MOS transistors 2 and 3 or the limit current value is set by setting each transistor size of the MOS transistors 2 and 3.

Inventors:

Yoneda Kazuhiro
Hirofumi Watanabe
Takaaki Negoro
Katsuhiko Aisu
Katsuyuki Sakurano

Application Number:

JP2013126638A

Publication Date:

April 19, 2017

Filing Date:

June 17, 2013

Export Citation:

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