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:
Nov. 01, 2022
Filed:
Feb. 04, 2020
Applicant:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Inventors:
Mikiko Fukasawa, Kyoto, JP;
Kazuhiko Ishimoto, Kyoto, JP;
Assignee:
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/02 (2006.01); H03F 3/19 (2006.01); H03F 1/52 (2006.01); H03F 3/21 (2006.01);
U.S. Cl.
CPC ...
H03F 1/0216 (2013.01); H03F 1/52 (2013.01); H03F 3/19 (2013.01); H03F 3/21 (2013.01); H03F 2200/451 (2013.01);
Abstract
A current control circuit controls a base current of a first transistor included in a bias circuit outputting a bias current to a power amplifier based on a base-collector voltage of the first transistor. The current control circuit includes a first circuit that outputs a signal associated with the base-collector voltage of the first transistor, and a second circuit that, based on the signal, provides electrical continuity between a base of the first transistor and a reference potential.