Amplitude shift key modulation for multi-device wireless chargers
US11837882B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 2021 |
| Grant date | Dec 5, 2023 |
| Priority date | — |
| Expiry date | Feb 16, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Systems, methods and apparatus for wireless charging are disclosed. One method includes providing a first charging current to a first transmitting coil in a wireless charging device, where the first transmitting coil is coupled to a receiving coil in a first power receiving device, providing a second charging current to a second transmitting coil in the wireless charging device, where the second transmitting coil is coupled to a receiving coil in a second power receiving device, the first charging current and the second charging current being provided at different frequencies from one another, receiving a first modulated signal from the first power receiving device, where the first modulated signal includes a carrier signal provided at a frequency corresponding to the frequency of the first charging current, and filtering the first modulated signal using a band-pass filter configured to block a second modulated signal transmitted by the second power receiving device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.