Specifying SC and IT cut quartz resonators for optimal temperature compensated oscillator performance
US11456700B1 · kind B1 · utility
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9References
17Claims
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Key dates
| Filing date | Aug 20, 2021 |
| Grant date | Sep 27, 2022 |
| Priority date | — |
| Expiry date | Aug 20, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2200/0018
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An oscillator includes dual resonators mounted in a helium filled coldweld holder. One resonator operates at anti-resonance into a load capacitance of about 20 picofarads, and operates on a third overtone frequency under noncontrolled temperature conditions. The other resonator operates on a fundamental mode at anti-resonance in a load capacitance of about 32 picofarads. Resonator crystals in a dual-crystal resonator may include a theta-angle shift to equalize frequency versus temperature curves at temperature extremes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.