Antenna impedance modulation method
US8022889B2 · kind B2 · utility
2Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2008 |
| Grant date | Sep 20, 2011 |
| Priority date | — |
| Expiry date | Sep 12, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for modulating the impedance of an antenna circuit supplying pump signals to a charge pump comprising at least one first pump stage and one last pump stage, the last pump stage supplying a continuous voltage. The output of the first pump stage is short-circuited by means of a switch and the last pump stage goes on pumping electric charges and supplying the continuous voltage. Application in particular to RFID passive transponders.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.