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. 16, 2021
Filed:
Jan. 23, 2020
Applicant:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Inventors:
Kenji Tahara, Kyoto, JP;
Yoshiaki Sukemori, Kyoto, JP;
Assignee:
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/21 (2006.01); H03F 3/60 (2006.01); H03F 1/02 (2006.01);
U.S. Cl.
CPC ...
H03F 3/21 (2013.01); H03F 1/0211 (2013.01); H03F 3/604 (2013.01);
Abstract
A power amplifier includes an amplifier circuit group including multiple amplifier circuits, a distributing circuit that distributes an input signal to each of the multiple amplifier circuits, and a combining circuit that combines output signals from the multiple amplifier circuits. Each of the multiple amplifier circuits includes an amplifier transistor including multiple cell transistors having different sizes and bias circuits that supply bias current to the respective cell transistors.