Temperature-stable LC oscillators and methods of oscillation at temperature null phase
US8810329B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Aug 8, 2012 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | Nov 15, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L1/022
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An LC oscillator tank that generates a tank oscillation at a phase substantially equal to a temperature null phase. The oscillator further includes frequency stabilizer circuitry coupled to the LC oscillator tank to cause the LC oscillator tank to operate at the temperature null phase. In one aspect of the disclosure, a feedback loop may split the output voltage of the LC tank into two voltages having different phases, where each voltage is independently transformed into a current through programmable transconductors, The two currents may be combined to form a resultant current which is then applied to the LC tank. The phase of the resultant current is such that the LC tank operates at an impedance condition that achieves frequency stability across temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.