Invention Grant
- Patent Title: Surface acoustic wave filter device
- Patent Title (中): 表面声波滤波装置
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Application No.: US13558402Application Date: 2012-07-26
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Publication No.: US08436697B2Publication Date: 2013-05-07
- Inventor: Yuichi Takamine
- Applicant: Yuichi Takamine
- Applicant Address: JP Kyoto
- Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee: Murata Manufacturing Co., Ltd.
- Current Assignee Address: JP Kyoto
- Agency: Keating & Bennett, LLP
- Priority: JP2010-017234 20100128
- Main IPC: H03H9/72
- IPC: H03H9/72 ; H03H9/64

Abstract:
A small-sized surface acoustic wave filter device having favorable filter characteristics includes a transmission-side surface acoustic wave filter chip including a ladder surface acoustic wave filter unit located on a piezoelectric substrate. The ladder surface acoustic wave filter unit includes a series arm connected between an input pad and an output pad and a plurality of resonators and including at least one first resonator connected to the input pad or the output pad. A die-attach surface is provided with an inductor connected to the first resonator. The inductor is arranged such that at least a portion thereof faces the first resonator and does not face any of the plurality of resonators and other than the first resonator.
Public/Granted literature
- US20120286896A1 SURFACE ACOUSTIC WAVE FILTER DEVICE Public/Granted day:2012-11-15
Information query
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