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:
Dec. 14, 2021
Filed:
Feb. 07, 2020
Applicant:
Murata Manufacturing Co., Ltd., Kyoto, JP;
Inventor:
Nobuyasu Beppu, Kyoto, JP;
Assignee:
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/22 (2006.01); H03F 1/02 (2006.01); H03F 1/34 (2006.01); H03F 3/195 (2006.01);
U.S. Cl.
CPC ...
H03F 1/223 (2013.01); H03F 1/0211 (2013.01); H03F 1/342 (2013.01); H03F 3/195 (2013.01); H03F 2200/129 (2013.01); H03F 2200/21 (2013.01); H03F 2200/294 (2013.01); H03F 2200/451 (2013.01);
Abstract
An amplifier circuit is a cascade amplifier circuit that includes a first transistor circuit including a signal input portion to which a signal is input from outside; a load circuit connected between the first transistor circuit and a power-supply line; and a second transistor cascode-connected between the load circuit and the first transistor circuit. The first transistor circuit is constituted by a plurality of transistors connected in parallel, and a bias circuit is provided that selectively supplies a bias voltage to the plurality of transistors.