Oscillator calibration
US11108382B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 24, 2020 |
| Grant date | Aug 31, 2021 |
| Priority date | — |
| Expiry date | Sep 24, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/0991
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An oscillator circuit includes a first oscillator, a second oscillator, and a calibration circuit to calibrate the first and second oscillators. The first oscillator is supplied with a first supply voltage, and the second oscillator is supplied with a second supply voltage. The calibration includes setting a frequency control of the second oscillator at a target frequency. Then, a voltage control of the second supply voltage is adjusted incrementally until a first control value is identified at which a second oscillator output frequency matches the target frequency. Then, a voltage control of the first supply voltage is set to the first control value. Then, the voltage control for the first supply voltage is adjusted incrementally until a second control value is identified at which a first oscillator output frequency is as close to the second oscillator output frequency as is achievable, but does not exceed it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.