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:
Oct. 04, 2016
Filed:
Jan. 05, 2015
Murata Manufacturing Co., Ltd., Kyoto, JP;
Makoto Tabei, Kyoto, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
Consumption current may be reduced in a power amplifier module in which a power supply voltage supplied to a power amplification transistor is controlled according to the level of output power. The power amplifier module includes an amplification transistor supplied with the power supply voltage according to the level of output power to amplify a radio-frequency signal, a bias control circuit for generating a bias voltage according to the power supply voltage, and a bias circuit for supplying a bias current according to the bias voltage to the amplification transistor, wherein current flowing through the amplification transistor when the radio-frequency signal is not input is varied according to the level of output power.