Compensating for hysteretic characteristics of crystal oscillators
US9548744B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2015 |
| Grant date | Jan 17, 2017 |
| Priority date | — |
| Expiry date | Aug 14, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L1/02
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In some examples, compensating for hysteretic characteristics of a crystal oscillator in a timing circuit includes obtaining a plurality of successive temperature measurements. From the plurality of successive temperature measurements, a temperature gradient having a sign and a magnitude can be determined. A frequency compensation parameter can then be determined based on any combination of two or more factors chosen from a set of factors including a temperature measurement, the sign of the temperature gradient, and the magnitude of the temperature gradient. A frequency error of the timing circuit can then be compensated based on the frequency compensation parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.