Frequency selection unit |
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| 申请号 | JP11701078 | 申请日 | 1978-09-22 | 公开(公告)号 | JPS5544245A | 公开(公告)日 | 1980-03-28 |
| 申请人 | Clarion Co Ltd; | 发明人 | OSHISHIBA TSUNEO; MINAGAWA SHIYOUICHI; OKAMOTO TAKESHI; | ||||
| 摘要 | PURPOSE: To prevent the change in the size of output caused by the phase relation between the pumping frequency and the input signal, by using unidirectional transducer as the surface acoustic wave transducer. CONSTITUTION: The phase unit 14 is connected between the input terminals 1' and 1" of the input transducer 1 to give suitable phase difference between the both terminals, and the transducer 1 produces sound only to left direction. Further, the phase unit 15 is connected between the input terminals 2' and 2" of the output transducer 2 to give suitable phase difference between the both terminals, and the transducer 2 detects sound only to right direction. Thus, while sound advances the pump electrode 3, the sound in frequency f i advancing right is produced with parametric mutual operation. When this propagates the pump electrode 4, the sound in frequency f s advancing left direction again with the parametric mutual operation is produced. COPYRIGHT: (C)1980,JPO&Japio |
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| 权利要求 | |||||||
| 说明书全文 | |||||||
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