Circuit arrangement and method for supplying power to a transponder
US7535362B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2006 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | Jul 17, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/07749
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A circuit arrangement is provided for a power supply to a transponder including an antenna resonant circuit and a downstream rectifier circuit for receiving and for rectifying an electromagnetic signal, a charging capacitor connected downstream on the output side of the rectifier circuit to provide a first supply voltage, with a tuning circuit for tuning the antenna resonant circuit to its resonance frequency, and with an auxiliary voltage source, which is designed to provide a second supply voltage, lower than the first supply voltage, for supplying the tuning circuit. A method is also provided for supplying power to a transponder with a first supply voltage, as well as a transponder having a circuit arrangement for a power supply.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.