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11. 发明授权

US4422055A Strain relief technique for surface acoustic wave devices 失效
标题翻译：表面声波装置的应变消除技术
公开(公告)号：US4422055A
公开(公告)日：1983-12-20
申请号：US316699
申请日：1981-10-30
申请人： Donald E. Cullen , Gary K. Montress , Meyer Gilden , Robert A. Wagner
发明人： Donald E. Cullen , Gary K. Montress , Meyer Gilden , Robert A. Wagner
IPC分类号： H03H9/02 , H03H9/05 , H03H9/10 , H03H9/42 , H03H9/64
CPC分类号： H03H9/1092 , H03H9/02897
摘要： A strain isolation technique for a surface acoustic wave (SAW) device having a piezoelectric SAW substrate is disclosed. A cut in the surface of the piezoelectric SAW substrate forms an isolated surface region where active SAW signal propagation occurs. The cut prevents undesirable surface strains from affecting SAW signal propagation in the isolated region.
摘要翻译：公开了一种具有压电SAW基片的声表面波（SAW）器件的应变隔离技术。在压电SAW基片的表面上的切割形成了发生有源SAW信号传播的隔离表面区域。切割防止不希望的表面应变影响隔离区域中的SAW信号传播。

12. 发明授权

US5262659A Nyquist frequency bandwidth hact memory 失效
标题翻译：奈奎斯特频带宽带内存
公开(公告)号：US5262659A
公开(公告)日：1993-11-16
申请号：US928374
申请日：1992-08-12
申请人： Thomas W. Grudkowski , Donald E. Cullen
发明人： Thomas W. Grudkowski , Donald E. Cullen
IPC分类号： H01L29/765 , H03H9/02 , H01L29/84 , H01L29/96 , H01L41/08
CPC分类号： H01L29/765 , H03H9/02976
摘要： A HACT device which propagates charge packets 21 along a charge transport channel 17 by a surface acoustic wave (SAW) 14 is provided with an interdigital electrode grid 30 disposed on the upper surface of the HACT, near the charge transport channel 17, having electrodes 30 spaced a distance of one-half wavelength of the SAW. A hold voltage Vh is applied across alternating electrodes to store (i.e., stop and hold) each charge packet. When a charge packet is to be released, the hold voltage Vh is removed and the electrodes 30 are shorted together or alternatively connected through a maximum allowable impedance, thereby allowing each charge packet 21 to be stored and released by the device without having the electrodes 30 absorb the SAW electric fields. Because the electrodes 30 are spaced one-half a SAW wavelength apart, the HACT memory can store each and every charge packet 21, thereby providing a Nyquist bandwidth device. Furthermore, the electrodes 30 are made thin to reduce mechanical absorption of the SAW by the electrodes.
摘要翻译：通过表面声波（SAW）14沿着电荷传送通道17传播电荷包21的HACT装置设置有设置在HACT的上表面上的交叉指状电极栅极30，电荷传输通道17附近具有电极30 隔开SAW的二分之一波长的距离。在交替电极之间施加保持电压Vh以存储（即停止和保持）每个电荷包。当要释放电荷包时，保持电压Vh被去除，并且电极30被短路在一起，或者通过最大允许阻抗交替地连接，从而允许每个电荷包21被器件储存和释放，而不需要电极30 吸收SAW电场。因为电极30隔开一半的SAW波长，所以HACT存储器可以存储每一个电荷包21，从而提供奈奎斯特带宽装置。此外，电极30被制成薄以减少由电极对SAW的机械吸收。

13. 发明授权

US4213104A Vacuum encapsulation for surface acoustic wave (SAW) devices 失效
标题翻译：表面声波（SAW）器件的真空封装
公开(公告)号：US4213104A
公开(公告)日：1980-07-15
申请号：US945359
申请日：1978-09-25
申请人： Donald E. Cullen , Robert A. Wagner
发明人： Donald E. Cullen , Robert A. Wagner
IPC分类号： G10K11/36 , H03H3/08 , H03H3/10 , H03H9/10 , H03H9/25 , H03H9/04 , H03H9/30
CPC分类号： H03H9/1092 , G10K11/36
摘要： A surface acoustic wave (SAW) device having a substrate of desired material is vacuum encapsulated in a structure fabricated from the same material as that comprising the substrate.
摘要翻译：具有所需材料的衬底的表面声波（SAW）器件被真空封装在由与包括衬底的材料相同的材料制成的结构中。

14. 发明授权

US4100811A Differential surface acoustic wave transducer 失效
标题翻译：差分声表面波换能器
公开(公告)号：US4100811A
公开(公告)日：1978-07-18
申请号：US779106
申请日：1977-03-18
申请人： Donald E. Cullen , Thomas M. Reeder
发明人： Donald E. Cullen , Thomas M. Reeder
IPC分类号： G01L9/00 , G01L1/16
CPC分类号： G01L9/0025 , Y10S73/04
摘要： A diaphragm formed in a substrate and having a piezoelectric surface includes a first surface acoustic wave (SAW) delay line disposed on said surface and connected in an oscillator circuit for a significant frequency sensitivity to surface strain of said diaphragm, and a second, similar oscillator with the SAW delay line thereof connected for a significant frequency sensitivity to surface strain of the diaphragm opposite in sense to that of the first oscillator, and a mixer for providing the difference in the frequencies of the two oscillators, whereby the overall sensitivity to strain is enhanced, while at the same time the sensitivity to temperature variations is reduced significantly through subtractive combination.
摘要翻译：形成在基板中并且具有压电表面的隔膜包括设置在所述表面上的第一表面声波（SAW）延迟线，并连接在振荡器电路中，以对所述隔膜的表面应变具有显着的频率灵敏度，以及第二类似的振荡器其SAW延迟线被连接成对于与第一振荡器的表面应变相反的表面应变具有显着的频率灵敏度，以及用于提供两个振荡器的频率差的混合器，由此对应变的总体灵敏度为增强，同时通过减法组合显着降低对温度变化的敏感性。

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