High-stability resonators of solid elastic material and oscillators using them
US5361045A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 1989 |
| Grant date | Nov 1, 1994 |
| Priority date | — |
| Expiry date | Mar 23, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H9/125
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A preferred embodiment of a resonator embodying the invention comprises entially a resonating plate, an action electrode and a detection electrode, and a supporting base. The electrodes are placed facing symmetrical narrow edges of the plate, opposite vibration loops, and are coupled to the plate by capacitive, electrostrictive or piezoelectric effect according to the material of which the plate is comprised. A very wide range of elastic solid materials can be used to embody the resonating plate. The plate is attached to the supporting base at points corresponding to vibration nodes of the plate. The plate vibrates advantageously according to a contour mode called Lame mode. High coefficients of quality in the region of 10.sup.7 are obtained. The resonators embodying the invention can be easily integrated. To do so, the plate is e.g. embodied in silicon. Such a resonator is included in a high-stability oscillating loop comprising a phase shifter and an amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.