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Transmission apparatus for a wireless device using delta-sigma modulation

  • US 9,178,731 B2
  • Filed: 09/22/2014
  • Issued: 11/03/2015
  • Est. Priority Date: 07/11/2012
  • Status: Active Grant
First Claim
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1. A transmission apparatus for a wireless device, comprising:

  • an antenna for receiving an original signal and for backscattering a modulated signal containing information from the wireless device;

    a variable impedance coupled to the antenna, the variable impedance having an impedance value;

    a delta-sigma modulator coupled to the variable impedance for modulating the impedance value, and thereby a backscattering coefficient for the antenna, in accordance with the information to generate the modulated signal; and

    ,a decoder coupled to the delta-sigma modulator for generating the impedance value from the information.

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