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.
Patent No.:
Date of Patent:
Jun. 02, 2026
Filed:
Jan. 27, 2023
Applicant:
Fujikura Ltd., Tokyo, JP;
Inventors:
Assignee:
Fujikura Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03F 3/45 (2006.01); H03F 1/56 (2006.01); H03G 1/00 (2006.01); H03G 3/30 (2006.01);
U.S. Cl.
CPC ...
H03F 3/45085 (2013.01); H03F 1/56 (2013.01); H03G 1/0023 (2013.01); H03G 3/3015 (2013.01); H03F 2200/222 (2013.01); H03F 2200/387 (2013.01);
Abstract
A variable gain amplifier includes a differential amplifier circuit having a pair of input terminals and a pair of output terminals, and a first variable attenuation circuit connected between at least one of the pair of input terminals and the pair of output terminals of the differential amplifier circuit and capable of switching a resistance value on the basis of a control signal which is input from the outside.
Kamidaki, Chihiro. (2026). Variable gain amplifier (U.S. Patent No. 12647081). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12647081
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile