High-efficiency power amplifier system for wireless power transmitters
US10833638B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 2018 |
| Grant date | Nov 10, 2020 |
| Priority date | — |
| Expiry date | Dec 19, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/393
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
One example device for providing wireless power includes a power supply; a power amplifier coupled to the power supply, the power amplifier comprising a first switch and a second switch coupled to the power supply and to a common switch output, and a pulse-width modulator (“PWM”) coupled to the power amplifier, the PWM configured to substantially simultaneously toggle each of the first and second switches between open and closed states, and to maintain the first and second switches in opposite open and closed states; a controller coupled to the power supply and the PWM, the controller configured to: receive a sensor signal indicating an impedance of a load; determine a duty cycle of the PWM based on the sensor signal; and adjust an output voltage of the power supply based on the duty cycle of the PWM.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.