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. 24, 2025
Filed:
Oct. 21, 2021
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Masao Kondo, Nagaokakyo, JP;
Yasunari Umemoto, Nagaokakyo, JP;
Shaojun Ma, Nagaokakyo, JP;
Shinnosuke Takahashi, Nagaokakyo, JP;
Murata Manufacturing Co., Ltd., Kyoto-fu, JP;
Abstract
A power amplifier circuit includes an amplification unit, a heating unit, and a control circuit. The amplification unit is configured to amplify a radio-frequency signal. The heating unit is provided adjacent to the amplification unit. The heating unit includes one or more transistors configured to generate heat that increases as the passing current increases. The control circuit is coupled to the one or more transistors. The control circuit is configured to increase the passing current when the environmental temperature is a predetermined threshold or lower.