| 发明名称 |
Surface acoustic wave filter. |
| 摘要 |
<p>A SAW filter includes a first SAW resonator (21, R1A, R1B) having a pair of terminals and a predetermined resonance frequency (frp), the first SAW resonator being provided in a parallel arm (24) of the SAW filter. A second SAW resonator (23) has a pair of terminals and a predetermined resonance frequency (frs) approximately equal to a predetermined antiresonance frequency of the first SAW resonator (fap). The second SAW resonator is provided in a series arm (24) of the SAW filter. An inductance element (25, L1) is connected in series to the first SAW resonator. <IMAGE></p> |
| 申请公布号 |
EP0541284(A1) |
申请公布日期 |
1993.05.12 |
| 申请号 |
EP19920309830 |
申请日期 |
1992.10.27 |
| 申请人 |
FUJITSU LIMITED |
发明人 |
SATOH, YOSHIO;IKATA, OSAMU;MIYASHITA, TSUTOMU;MATSUDA, TAKASHI;TAKAMATSU, MITSUO |
| 分类号 |
H03H9/10;H03H9/64;H03H9/72 |
主分类号 |
H03H9/10 |
| 代理机构 |
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代理人 |
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| 地址 |
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