Dual communication frequency RFID circuit equipped with a tamper-evident loop
US10152863B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 5, 2017 |
| Grant date | Dec 11, 2018 |
| Priority date | — |
| Expiry date | Dec 5, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/2477
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A dual communication frequency RFID circuit includes a logic unit for processing data signals received or transmitted at a first frequency by a first antenna or at a second frequency by a second antenna, and a unit for managing the state of a tamper loop linked to the integrated circuit by two connection terminals. The management unit includes a first low-pass filter linked to a first connection terminal, a second low-pass filter linked to a second connection terminal, a current source for supplying a current through the first low-pass filter, a switch linked at the output of the second low-pass filter, and a first inverter connected between the current source and the first low-pass filter for supplying an output signal for the state of the tamper loop to the logic unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.