The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Dec. 10, 2019

Filed:

Dec. 14, 2018
Applicant:

Ablic Inc., Chiba-shi, Chiba, JP;

Inventors:

Masakazu Sugiura, Chiba, JP;

Atsushi Igarashi, Chiba, JP;

Nao Otsuka, Chiba, JP;

Assignee:

ABLIC INC., Chiba, JP;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05F 3/26 (2006.01); G05F 3/30 (2006.01); G05F 3/24 (2006.01);
U.S. Cl.
CPC ...
G05F 3/262 (2013.01); G05F 3/24 (2013.01); G05F 3/30 (2013.01);
Abstract

A current generation circuit includes: a current source circuit including a first transistor and a first resistor, and configured to output a first current based on a source voltage or a drain voltage of the first transistor and a resistance of the first resistor; a current control circuit including a voltage input terminal, a second transistor and a third transistor, and configured to output a second current based on a source voltage of the second transistor and a resistance of the third transistor; and an impedance circuit including a second resistor formed of a same resistive body as the first resistor and a fourth transistor diode-connected to the second resistor, and configured to generate a control voltage at the voltage input terminal by the first current and the second current, wherein the current generation circuit is configured to output a current based on the second current.


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