Crystal resonator of (yzw).theta. orientation having a thickness to width ratio of less than one
US3955109A · kind A · utility
2Cited by
5References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Nov 29, 1974 |
| Grant date | May 4, 1976 |
| Priority date | — |
| Expiry date | Nov 29, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/176
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Spurious modes related to the slow shear mode in an X-cut lithium tantalate crystal are suppressed and/or eliminated by reducing the ratio of plate dimension along the slow shear direction (y') to the dimension along the X direction. Undesired modes associated with the flexural family of modes can be separated in frequency from the desired, fast shear mode by the "proper" ratio of plate dimension along the fast shear direction (z') to the dimension along the X axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.