Non-volatile memory for contactless systems
US8811896B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 2012 |
| Grant date | Aug 19, 2014 |
| Priority date | — |
| Expiry date | Jul 15, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K7/10237
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A contactless system is described in which energy is scavenged from an electromagnetic field provided by a proximate reader device. An embedded processor and a volatile memory circuit within a near field communication (NFC) controller are operated using the scavenged energy. Parameter data from the proximate reader device may be acquired while conducting a near field communication transaction. A non-volatile memory (NVRAM) server is coupled to the NFC controller and also operates using the scavenged energy. Parameter data may be stored within the NVRAM server by sending a command and the parameter data from the NFC controller to the NVRAM server. At the completion of the transaction, the electromagnet field may be removed and all parameter data stored within the NFC controller will be lost. However, the next time the electromagnetic field is applied, the NFC controller may retrieve the parameters from the NVRAM server by sending a command.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.