Power harvest architecture for near field communication devices
US9762292B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2013 |
| Grant date | Sep 12, 2017 |
| Priority date | — |
| Expiry date | May 23, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/79
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of charging a power harvested supply in an electronic communication device, which can be an NFC (near field communication) device. The power harvested supply in the electronic communication device is charged without causing dV/V violation and avoids false wake up. An RF (radio frequency) field is received at the antenna of the electronic communication device. A differential voltage is generated from the RF field at a first tag pin and a second tag pin of the electronic communication device. A bandgap reference voltage and a reference current are generated in response to the differential voltage. A shunt current is generated in response to the differential voltage and the bandgap reference voltage. A bank of switching devices is activated if the shunt current is more than the reference current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.