Receiver filter for DC-wander removal in a contactless smartcard
US8964904B2 · kind B2 · utility
1Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2013 |
| Grant date | Feb 24, 2015 |
| Priority date | — |
| Expiry date | Apr 15, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/0266
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Embodiments of a method for processing a baseband signal in a Direct Current (DC)-suppressed system, a system for processing a baseband signal in a DC-suppressed system, and a smart card are described. In one embodiment, a method for processing a baseband signal in a DC-suppressed system involves processing the baseband signal in the analog domain with a first high pass filter (HPF), converting the processed baseband signal to a digital signal, and processing the digital signal in the digital domain with a second HPF to provide a discrete-time differentiation of the baseband signal. Other embodiments are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.