Circuit and architecture for a demodulator for a wireless power transfer system and method therefor
US10778034B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2018 |
| Grant date | Sep 15, 2020 |
| Priority date | — |
| Expiry date | Dec 7, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/79
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A primary side wireless power transmitter inductively couplable to a secondary side wireless power receiver for supplying power to the wireless power receiver for receiving communications from the secondary side wireless power receiver through the inductive coupling comprises a primary side tank circuit receiving a signal on from the secondary side wireless power receiver. A phase delay or time delay circuit generates a fixed delay clock signal. A sample and hold circuit samples a tank circuit voltage utilizing the fixed phase or time delayed clock signal. A comparator is coupled to an output of the sample and hold circuit for extracting data or commands from the signal stream. A method of operating a primary side wireless transmitter inductively coupled to a secondary side wireless power receiver for supplying power to the wireless power receiver to power a load coupled to the receiver is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.