Circuit and method for driving an antenna of an NFC device
US10938107B2 · kind B2 · utility
1Cited by
6References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 28, 2018 |
| Grant date | Mar 2, 2021 |
| Priority date | — |
| Expiry date | Jun 5, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/48
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A circuit for driving an antenna of near field communication (NFC) device, includes: a first variable resistor coupled to a first terminal of the antenna via a first capacitor; a second variable resistor coupled to a second terminal of the antenna via a second capacitor; and a control circuit configured to cause the first variable resistor and the second variable resistor to each have a selected one of a first resistance level, a second resistance level, and a third resistance level based on an operating phase of the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.