发明公开
- 专利标题: IMPROVEMENTS TO FILTERS
- 专利标题(中): 改进过滤器
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申请号: EP01931920.1申请日: 2001-05-23
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公开(公告)号: EP1287613A1公开(公告)日: 2003-03-05
- 发明人: WHATMORE, Roger, W. , KIRBY, Paul, B. , SU, Qingxin , KOMURO, Eiju
- 申请人: TDK Corporation
- 申请人地址: 1-13-1, Nihonbashi,Chuo-ku Tokyo 103-8272 JP
- 专利权人: TDK Corporation
- 当前专利权人: TDK Corporation
- 当前专利权人地址: 1-13-1, Nihonbashi,Chuo-ku Tokyo 103-8272 JP
- 代理机构: Wightman, David Alexander
- 优先权: GB0012437 20000524
- 国际公布: WO01091290 20011129
- 主分类号: H03H3/02
- IPC分类号: H03H3/02 ; H03H9/58
摘要:
An electric filter comprises a plurality of thin film bulk acoustic resonants (10, 11) arranged in series and in parallel which have electrodes (24, 25) of different working area (L) and optionally a piezoelectric layer (23) of different thickness (T).
公开/授权文献
- EP1287613B1 ELECTRIC FILTER 公开/授权日:2009-02-25
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