Control voltage generator for a clock, frequency reference, and other reference signal generator
US7978017B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2008 |
| Grant date | Jul 12, 2011 |
| Priority date | — |
| Expiry date | Jul 17, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Exemplary embodiments of the invention provide a reference signal generator, system and method. An exemplary apparatus to generate a harmonic reference signal includes a reference resonator, such as an LC-tank, a control voltage generator adapted to provide a temperature-dependent control voltage; and a plurality of variable reactance modules. The reference resonator generates a first reference signal having a resonant frequency, and each reactance module is adapted to modify a corresponding reactance in response to the control voltage to maintain the resonant frequency substantially constant or within a predetermined variance over a predetermined temperature range. A frequency controller may also be included to maintain substantially constant a magnitude of a peak amplitude of the first reference signal and maintains substantially constant a common mode voltage level of the reference resonator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.