Active load modulation technique in near field communication
US10264540B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 5, 2017 |
| Grant date | Apr 16, 2019 |
| Priority date | — |
| Expiry date | Oct 5, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/0337
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A near field communication (NFC) device configured to use in preparing a carrier signal for active load modulation supporting both synchronous and asynchronous transmissions. The NFC device comprises a local clock generator for generating a reference clock signal (REF_CLK), a clock extractor for recovering a clock signal (EXT_CLK) generated by an NFC initiator device, a frequency tracking module (FTM) for performing a frequency tracking operation based on an input clock signal (REF_CLK or EXT_CLK) to produce a FTM output with its frequency aligned with the input clock signal, and a phase tracking module (PTM) for performing a phase tracking operation on the FTM output based on EXT_CLK to produce a PTM output with its phase aligned with EXT_CLK.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.