Crystal oscillator circuit having fast start-up and method therefor
US7639097B2 · kind B2 · utility
9Cited by
12References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 11, 2007 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Jan 17, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B2200/0062
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a method of programming an oscillator circuit includes providing a resonator, a first programmable capacitor, a second programmable capacitor, and an amplifier. The first programmable capacitor and the second programmable capacitor may be programmed at a first capacitance value during a first time period, wherein the first programmable capacitor provides a first voltage to bias the resonator and the amplifier alters the second voltage to provide a third voltage to the resonator. During a second time period the first capacitance value is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.