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:
Mar. 21, 2023
Filed:
Nov. 01, 2021
Murata Manufacturing Co., Ltd., Kyoto, JP;
Kazuhiro Ikarashi, Kyoto, JP;
MURATA MANUFACTURING CO., LTD., Kyoto, JP;
Abstract
A radio-frequency signal receiver/transmitter circuit includes a power amplifying circuit that amplifies a radio-frequency transmit signal for output, at least one duplexer including a transmit filter for passing the radio-frequency transmit signal and a receive filter for passing a radio-frequency receive signal, a switch that electrically connects between the power amplifying circuit and the transmit filter, and a control circuit that controls enabling/disabling the power amplifying circuit, that controls connection of the switch, and that controls switching the receive filter between first bandpass characteristics and second bandpass characteristics. The receive filter switches between the first bandpass characteristics and the second bandpass characteristics, in which attenuation is relatively less than that in the first bandpass characteristics. The control circuit exerts such control that the receive filter in the duplexer, including the transmit filter through which the radio-frequency transmit signal does not pass, changes to the second bandpass characteristics.