Signal processing circuit for a contactless communicating communication partner device
US7783254B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2005 |
| Grant date | Aug 24, 2010 |
| Priority date | — |
| Expiry date | Oct 13, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a signal processing circuit (3) for a contactlessly communicating communication partner device (1), there are provided a transmitted-signal path (9) and a received-signal path (10), the received-signal path (10) branching off from a branch point (AP) present on the transmitted-signal path (9), a filter stage (11) and a matching stage (12) connected downstream of the filter stage (11) being provided on the transmitted-signal path (9), the filter stage (11) having a resonant frequency that is in a frequency range the center frequency value of which matches an upper sideband frequency, and the branch point (AP) being situated between the filter stage (11) and the matching stage (12).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.