Method and device for transmitting data by charge modulation
US8285204B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 2, 2007 |
| Grant date | Oct 9, 2012 |
| Priority date | — |
| Expiry date | Nov 12, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0713
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A contactless data transmission device includes an antenna circuit supplying an alternating voltage in the presence of an alternating excitation field, a charge modulation transistor having a control terminal receiving a charge modulation signal having at least one low state and one high state, and a conduction terminal receiving the alternating voltage. The device includes a circuit for supplying a boosted direct voltage greater than a peak value of the alternating voltage supplied by the antenna circuit, and a circuit for applying to the control terminal of the charge modulation transistor a charge modulation signal which, in the high state, has a voltage level equal to the boosted direct voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.