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RFID tag with MOS bipolar hybrid rectifier

  • US 8,326,256 B1
  • Filed: 07/15/2008
  • Issued: 12/04/2012
  • Est. Priority Date: 07/15/2008
  • Status: Active Grant
First Claim
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1. A power rectifier for a Radio Frequency Identification tag, comprising:

  • an antenna input node configured to receive wirelessly an alternating signal; and

    a plurality of serially coupled stages, at least one of the stages coupled to the antenna input node, and including a first Hybrid element and a second Hybrid element,the first Hybrid element including;

    a first transistor having an input terminal, an output terminal and a first gate, anda first device having an input terminal and an output terminal, the second Hybrid element including;

    a second transistor having an input terminal, an output terminal and a second gate; and

    a second device having an input terminal and an output terminal;

    in which the input terminal of the first device is connected to the output terminal of the first transistor to form a first intermediate node that is not connected to any other components, andthe first gate is coupled to the antenna input node,the first device is not biased by the alternating signal;

    the output terminal of the second device is connected to the input terminal of the second transistor to form a second intermediate node that is not connected to any other components,the second gate is coupled to the antenna input node, andthe second device is one of a PNP transistor, an NPN transistor, a Schottky diode, and a diode-connected native NMOS transistor.

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