Amplitude-shift keying demodulation for wireless chargers
US11509513B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 13, 2021 |
| Grant date | Nov 22, 2022 |
| Priority date | — |
| Expiry date | Aug 13, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/06
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A power transmitter includes: a first switch coupled between a first node and a reference voltage node; a second switch configured to be coupled between a power supply and the first node; a coil and a capacitor coupled in series between the first node and the reference voltage node; a first sample-and-hold (S&H) circuit having an input coupled to the first node; and a timing control circuit configured to generate a first control signal, a second control signal, and a third control signal that have a same frequency, where the first control signal is configured to turn ON and OFF the first switch alternately, the second control signal is configured to turn ON and OFF the second switch alternately, and where the third control signal determines a sampling time of the first S&H circuit and has a first pre-determined delay from a first edge of the first control signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.