Rectifier and limiter circuit controlled by switching signals, and passive radio frequency tag
US10387760B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Jul 6, 2016 |
| Grant date | Aug 20, 2019 |
| Priority date | — |
| Expiry date | Dec 6, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0709
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to the technical field of radio frequency identification, in particular to a rectifier and limiter circuit controlled by switching signals and a passive radio frequency tag comprising the rectifier and limiter circuit. The rectifier and limiter circuit controlled by switching signals provided by the present invention converts DC signals, which are absorbed and rectified by an inductance coil antenna of a passive RFID tag, into high- and low-level signals and inputs the high- and low-level signals into the control input terminals of discharge paths of a rectifier circuit. The discharge paths are controlled to be opened or closed according to the amount of charge. The amplitude limiting control of the circuit voltage is realized by dynamically adjusting the voltage amplitude of a rectifier, thereby meeting the requirements on reliability of over-voltage protection of a semiconductor device on a chip and avoiding saturation of reception at the card reader side.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.