Payment card signal characterization methods and circuits
US7422157B2 · kind B2 · utility
2Cited by
19References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2005 |
| Grant date | Sep 9, 2008 |
| Priority date | — |
| Expiry date | Dec 30, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/1008
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A reference reader is provided for testing contactless electronic payment cards whose data transmissions are via weak load modulated RF carrier signals. The reference reader includes a reader antenna and a coupled common mode rejection circuit. The common mode rejection circuit is configured to demodulate carrier signals received at the reader antenna to retrieve payment card data signals having low modulation indices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.