Auto-compensation for control voltage range of VCO at low power supply
US10868495B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2019 |
| Grant date | Dec 15, 2020 |
| Priority date | — |
| Expiry date | Jun 12, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/183
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Some aspects of the present disclosure relate to an apparatus, a PLL and an electronic device. The apparatus comprises a voltage-to-current (V2I) converter, a current controlled oscillator and a compensation current. The V2I converter is operable to receive a first voltage and generate a first current based on the first voltage. The current controlled oscillator is coupled to the V2I converter and operable to generate an oscillation signal based on a second current from or to the V2I converter. The compensation circuit is coupled to the V2I converter and operable to receive a third current from or to the V2I converter. The second and third currents vary in response to at least one of temperature variation and supply voltage variation of the apparatus. Variation direction of the third current is opposite to variation direction of the second current and different frequencies may be provided for a low supply voltage domain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.