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Identification transponder

  • US 6,801,122 B2
  • Filed: 08/22/2001
  • Issued: 10/05/2004
  • Est. Priority Date: 08/24/2000
  • Status: Expired due to Fees
First Claim
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1. An identification transponder for providing an identification code to a base station through variation of a radio frequency signal originating from the base station in a rhythm corresponding to the identification code, comprisingan identification generator that is configured to generate the identification code;

  • a rectifier that is constructed so as to achieve a coupling without direct electrical contact with the radio frequency signal for providing a supply voltage to the identification generator, and a load transistor with a main current path and with a control electrode which is coupled to a signal output terminal of the identification generator for providing a varying load to the rectifier as a result of which the radio frequency signal varies in said rhythm, wherein the rectifier comprises the main current path of the load transistor.

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