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Transmission apparatus for a wireless device using delta-sigma modulation

  • US 10,419,254 B2
  • Filed: 08/14/2018
  • Issued: 09/17/2019
  • Est. Priority Date: 09/22/2014
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving, via an antenna of a wireless device, an original signal transmitted by a detecting device;

    receiving, at a decoder of the wireless device, an N-bit digital waveform representing information within the wireless device, wherein the decoder is coupled to a variable impedance circuit of the wireless device; and

    responsive to the received N-bit digital waveform, modulating a variable impedance value of the variable impedance circuit, wherein the N-bit digital waveform has a modulation type,wherein a backscattering coefficient of the antenna changes responsively to the modulated variable impedance value to backscatter the original signal as a modulated signal that is a frequency offset form of the N-bit digital waveform, andwherein the N-bit digital waveform received by the decoder produces a control signal for the variable impedance circuit that is related to the N-bit digital waveform.

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