发明申请
- 专利标题： Filter using piezoelectric resonator
- 专利标题（中）： 使用压电谐振器滤波
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申请号： US11582425申请日： 2006-10-18
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公开(公告)号： US20070109073A1公开(公告)日： 2007-05-17
- 发明人: Takehiko Yamakawa , Hiroshi Yamaguchi , Hiroshi Nakatsuka , Hiroyuki Nakamura , Keiji Onishi , Toshio Ishizaki
- 申请人： Takehiko Yamakawa , Hiroshi Yamaguchi , Hiroshi Nakatsuka , Hiroyuki Nakamura , Keiji Onishi , Toshio Ishizaki
- 优先权： JP2003-391110 20031120; JP2006-228111 20060824
- 主分类号： H03H9/70
- IPC分类号： H03H9/70 ; H03H9/58
摘要：
A series piezoelectric resonator 11 is connected in series between an input terminal 15a and an output terminal 15b. A first electrode of a parallel piezoelectric resonator 12a is connected to a connection point between the input terminal 15a and the series piezoelectric resonator 11, and a second electrode of the parallel piezoelectric resonator 12a is connected to a first terminal of an inductor 13a. A first electrode of a parallel piezoelectric resonator 12b is connected to a connection point between the series piezoelectric resonator 11 and the output terminal 15b, and a second electrode of the parallel piezoelectric resonator 12b is connected to a first terminal of an inductor 13b. Second terminals of the inductors 13a and 13b are grounded. An additional piezoelectric resonator 14 is connected between the second electrode of the parallel piezoelectric resonator 12a and the second electrode of the parallel piezoelectric resonator 12b.
公开/授权文献
- US07479847B2 Filter using piezoelectric resonator 公开/授权日：2009-01-20
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