发明名称 |
Acoustic filter with two different channels with compensation for rejection |
摘要 |
A surface acoustic wave filter includes first and second channels, each channel including at least one input transducer and one input transducer. The transfer functions of the first channel and of the second channel are in phase in the passband of the filter and in antiphase in the rejection band of the filter. The filter enables the use of frequency responses for each channel, with wide bands enabling high reduction of the size of the filter while at the same time reducing the rejection band of the total filter. Such a filter may find particular application to mobile telephony.
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申请公布号 |
US6313717(B1) |
申请公布日期 |
2001.11.06 |
申请号 |
US19990374510 |
申请日期 |
1999.08.16 |
申请人 |
THOMSON-CSF |
发明人 |
DUFILIE PIERRE;CHAMALY STéPHANE |
分类号 |
H03H9/00;H03H9/02;H03H9/145;H03H9/64;(IPC1-7):H03H9/64;H03H3/08 |
主分类号 |
H03H9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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