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. 04, 2025
Filed:
Nov. 09, 2022
Murata Manufacturing Co., Ltd., Kyoto, JP;
Masatoshi Hase, Kyoto, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
A power amplifier circuit includes amplifying transistors electrically cascade-connected, amplifying a signal supplied to a base, and outputting an amplified signal; a first resistive element having end parts connected to the base of a first amplifying transistor; a second resistive element having end parts connected to the base of a second amplifying transistor, which is an amplifying transistor located closer to an input side than the first amplifying transistor; a first bias supplying transistor having an emitter connected to one of the end parts of the first resistive element; a second bias supplying transistor having an emitter connected to one of the end parts of the second resistive element; and a bias current compensation transistor having a base connected to the end part of the first resistive element, a collector connected to the end part of the second resistive element, and an emitter connected to ground.