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Reader device for contactless reading of transponder data

  • US 7,425,895 B2
  • Filed: 11/02/2005
  • Issued: 09/16/2008
  • Est. Priority Date: 11/09/2004
  • Status: Expired due to Fees
First Claim
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1. A reader device for contactless reading of transponder data regarding an electromagnetic field, having a read antenna (10) connected to a receiving circuit (12) for demodulation and preparation of the transponder data, wherein the reader device includes a digital signal processor (16) connected to the receiving circuit (12) or forming part of the receiving circuit (12) for generating a display signal representing at least one of an amplitude-time curve and a frequency spectrum of the received signals, and wherein at least one of an optical display device integrated in the reader device for the at least one of the amplitude-time curve and the frequency spectrum of the received signals and an interface (34) integrated in the reader device for connecting an external optical display device (72) for the at least one of the amplitude-time curve and the frequency spectrum of the received signals is connected to a display signal output of the digital signal processor (16).

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