Auxiliary varactor for temperature compensation
US8022780B2 · kind B2 · utility
6Cited by
5References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 22, 2008 |
| Grant date | Sep 20, 2011 |
| Priority date | — |
| Expiry date | Apr 22, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L1/025
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Techniques for compensating for the effects of temperature change on voltage controlled oscillator (VCO) frequency are disclosed. In an embodiment, an auxiliary varactor is coupled to an LC tank of the VCO. The auxiliary varactor has a capacitance controlled by a temperature-dependant control voltage to minimize the overall change in VCO frequency with temperature. Techniques for generating the control voltage using digital and analog means are further disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.