Method and apparatus for controlled persistent ID flag for RFID applications
US7215251B2 · kind B2 · utility
43Cited by
11References
32Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 8, 2004 |
| Grant date | May 8, 2007 |
| Priority date | — |
| Expiry date | Apr 12, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A Radio-Frequency Identification (RFID) transponder is provided. The RFID transponder may include a basic ID flag circuit having a VDD voltage node, an output voltage node, and a capacitor coupled to the VDD voltage node and the output voltage node to store an ID flag. A supplemental discharge current circuit coupled to the basic ID flag circuit is provided in order to control persistence duration of the state of the ID flag. The persistence duration of the state of the ID flag is controlled by maintaining supplemental discharge current, which is greater than the leakage current of the basic ID flag circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.