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. 17, 2025
Filed:
Jul. 13, 2021
Murata Manufacturing Co., Ltd., Kyoto, JP;
Takayuki Tsutsui, Kyoto, JP;
Satoshi Tanaka, Kyoto, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
A radio-frequency amplifier circuit includes a first amplifier transistor configured to amplify and output a radio-frequency signal supplied to a base of the first amplifier transistor, a first bias transistor that is connected to the first amplifier transistor to form a current mirror and configured to supply a bias to the base of the first amplifier transistor, a second bias transistor that is connected to the base of the first amplifier transistor to form an emitter follower and configured to supply a bias to the base of the first amplifier transistor, and a first capacitor having a first end connected to the base of the first amplifier transistor and a second end connected to an emitter of the second bias transistor.