Invention Grant
- Patent Title: Acoustic wave filter device, multiplexer, radio-frequency front end circuit, and communication device
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Application No.: US16353088Application Date: 2019-03-14
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Publication No.: US10944381B2Publication Date: 2021-03-09
- Inventor: Hideki Tsukamoto , Koji Nosaka
- 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: JPJP2016-192301 20160929
- Main IPC: H03H9/54
- IPC: H03H9/54 ; H03H9/02 ; H03H9/205 ; H03H9/64 ; H03H9/70 ; H03H9/72 ; H03H9/56 ; H03H9/60
Abstract:
A filter includes a series arm resonator, a first parallel arm resonance circuit and a second parallel arm resonance circuit. The each of the first parallel arm resonance circuit and the second parallel arm resonance circuit includes: a parallel arm resonator that is connected to a node; a pair of elements consisting of a capacitor and a switch, which are connected in parallel with each other, that is connected in series with the parallel arm resonator; and an inductor that is provided on a path that connects the node and ground to each other via the switch. The inductance value of the inductor of the first parallel arm resonance circuit and the inductance value of the inductor of the second parallel arm resonance circuit are substantially equal to each other.
Public/Granted literature
- US20190267969A1 ACOUSTIC WAVE FILTER DEVICE, MULTIPLEXER, RADIO-FREQUENCY FRONT END CIRCUIT, AND COMMUNICATION DEVICE Public/Granted day:2019-08-29
Information query
IPC分类:
