Highly accurate temperature stable clock based on differential frequency discrimination of oscillators
US7982550B1 · kind B1 · utility
22Cited by
4References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 2008 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | Jun 29, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/16
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus and a method for compensating for a mismatch in temperature coefficients of two oscillator frequencies to match a desired frequency ratio between the two oscillator frequencies over a temperature range. In one embodiment of a temperature sensor, first and second oscillators of different temperature characteristics are coupled to a differential frequency discriminator (DFD) circuit. The DFD circuit compensates for the different characteristics in order to match a frequency difference between the first and second frequencies over a temperature range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.