Control and calibration of external oscillators
US12261608B2 · kind B2 · utility
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3References
20Claims
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Key dates
| Filing date | Dec 7, 2021 |
| Grant date | Mar 25, 2025 |
| Priority date | — |
| Expiry date | Dec 7, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L2207/06
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Apparatus and methods for control and calibration of external oscillators are provided herein. In certain embodiments, an electronic oscillator system includes a semiconductor die and a controllable oscillator that is external to the semiconductor die. The oscillation frequency of the controllable oscillator is tuned by a first varactor and a second varactor. The semiconductor die includes a phase-locked loop (PLL) that provides fine tuning to the controllable oscillator by controlling the first varactor, and a calibration circuit that provides coarse tuning to the controllable oscillator by controlling the second varactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.