Surface-elastic-wave parametric device |
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| 申请号 | JP16033679 | 申请日 | 1979-12-12 | 公开(公告)号 | JPS5684010A | 公开(公告)日 | 1981-07-09 |
| 申请人 | Clarion Co Ltd; | 发明人 | MINAGAWA SHIYOUICHI; OKAMOTO TAKESHI; SAKAI TAKAMASA; | ||||
| 摘要 | PURPOSE:To improve the efficiency of pump electric power by connecting voltage varactor diodes to pump electrodes on a propagation path for a surface elastic wave and by applying a pump voltage to them. CONSTITUTION:A pump voltage of a frequency twice selected frequency f0 is applied from high-frequency power source 9 to voltage varactor diodes C1-Cn. An electric signal applied to transducer 5 propagates on the surface of piezoelectric substance substrate A and while it is propagating through pump electrode groups M1-Mn, a signal component of approximate frequency f0is parametric-amplified. The amplified signal is reconverted by transducer 6 into an electric signal, which is outputted. Since the sum of widths and intervals of pump electrodes M1-Mn is made less of length lambda0 of irradiation, mechanical reflection is reduced. | ||||||
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| 说明书全文 | |||||||
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