Portable object inductively coupled to a fixed station and comprising gain control means
US8369778B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2009 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Apr 22, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/26
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The portable object is equipped with an antenna inductively coupled to a fixed station of a remote transmission device. The portable object comprises a variable load impedance and a rectifier connected in parallel to the terminals of the antenna, a regulation loop of the voltage at the terminals of the load impedance, connected between the output of the rectifier and a control terminal of the load impedance. The regulation loop comprises, in series, means for determining a difference between a setpoint voltage and the output voltage of the rectifier, a one-bit analog-to-digital converter, and command means of integrator type. The command means comprise a gain control input connected to an output of the gain control means receiving on input signals representative of the difference. Demodulation means are connected to the output of the converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.