Remote transmission apparatus operating by inductive coupling
US6778070B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 29, 1999 |
| Grant date | Aug 17, 2004 |
| Priority date | — |
| Expiry date | Mar 29, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A remote transmission apparatus for a portable object equipped with an antenna and connected by inductive coupling to a fixed station comprises data processor for processing and storing data concerning the portable object; a voltage rectifier for transforming the AC voltage supplied by the antenna of the portable object into a DC voltage carried by a power line (Vdd) to the data processor; a voltage regulator for regulating the DC voltage provided by the rectifier; and a modulator for modulating the signals to be transmitted comprising a transistor connected to an electronic dipole that causes a drop in voltage between the input and output of said modulator, said modulator being connected to the input of the voltage regulator to control the voltage on the terminals of the antenna in order to modulate the current flowing in the antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.