Driving crystal oscillator startup at above, below and operating frequency
US9515604B2 · kind B2 · utility
3Cited by
2References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2014 |
| Grant date | Dec 6, 2016 |
| Priority date | — |
| Expiry date | Dec 29, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B5/368
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit includes a crystal oscillator to generate an output frequency for a circuit. A driving oscillator generates a startup signal having a driving frequency that is provided to activate the crystal oscillator. The driving frequency of the startup signal is varied over a range of frequencies that encompass the operating frequency of the crystal oscillator to facilitate startup of the crystal oscillator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.