Method for limiting the voltage, level received from a magnetic field by a transponder and corresponding transponder
US11593577B2 · kind B2 · utility
0Cited by
3References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 22, 2019 |
| Grant date | Feb 28, 2023 |
| Priority date | — |
| Expiry date | Oct 22, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M7/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for limiting voltage at an input of an integrated circuit of a transponder contactlessly communicating with a reader includes, during the contactless communication: receiving a carrier signal at an antenna of the transponder; and controlling gate voltages of two transistors of a rectifier circuit of the transponder so as to modify an input impedance of the integrated circuit, wherein the two transistors are cross-coupled between terminals of the antenna and a reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.