NFC communicators implementing coil voltage reduction circuitry
US8489020B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2008 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Jun 23, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/26
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An NFC communicator has an antenna circuit to enable inductive coupling, via an RF H field, of the NFC communicator and another near field RF communicator in near field range. The antenna circuit has an antenna element coupled in parallel with a first capacitor to form a parallel LC circuit. The antenna element has an antenna coil in series with a second capacitor to reduce the voltage to which circuitry of the NFC communicator is subjected by a received RF H field. Alternatively or additionally, receive circuitry of the NFC communicator may be coupled to only a proportion of the antenna coil to reduce the voltage to which circuitry of the NFC communicator is subjected by a received RF H field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.