Invention Grant
- Patent Title: Variable filter circuit, high frequency module circuit, and communication device
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Application No.: US15666869Application Date: 2017-08-02
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Publication No.: US10432163B2Publication Date: 2019-10-01
- Inventor: Hirotsugu Mori
- Applicant: Murata Manufacturing Co., Ltd.
- Applicant Address: JP Kyoto
- Assignee: MURATA MANUFACTURING CO., LTD.
- Current Assignee: MURATA MANUFACTURING CO., LTD.
- Current Assignee Address: JP Kyoto
- Agency: Pearne & Gordon LLP
- Priority: JP2015-018322 20150202; JP2015-168411 20150828
- Main IPC: H03H7/12
- IPC: H03H7/12 ; H03H7/075 ; H03H7/09 ; H03H7/38 ; H03H7/01

Abstract:
The present disclosure provides a variable filter circuit capable of controlling a band width and a center frequency of a pass band, and also capable of suppressing the total number of pieces of variable reactance. That is, a variable filter circuit includes a serial arm in which a plurality of circuit elements are connected in series with respect to a signal path and a parallel arm in which a plurality of circuit elements are connected in parallel with respect to the signal path, wherein the serial arm and the parallel arm each includes a variable reactance element, a series reactance element that is connected in series to the variable reactance element and resonates therewith, and a parallel reactance element that is connected in parallel to the variable reactance element and resonates therewith.
Public/Granted literature
- US20170331444A1 VARIABLE FILTER CIRCUIT, HIGH FREQUENCY MODULE CIRCUIT, AND COMMUNICATION DEVICE Public/Granted day:2017-11-16
Information query
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