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Systems, devices, circuits and methods for communicating in a communication system

  • US 9,818,055 B2
  • Filed: 03/18/2011
  • Issued: 11/14/2017
  • Est. Priority Date: 03/18/2011
  • Status: Active Grant
First Claim
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1. A communication device for communicating with one or more reader devices, said communication device comprising:

  • an antenna;

    a resonant storage element, the resonant storage element stores at least some energy as received by the antenna to produce stored energy;

    a processor for controlling a release of stored energy to generate a modulated signal, wherein said modulated signal is a signal comprising digital data represented by at least one predefined sequence of transitions between a high energy level and a low energy level; and

    a selective energy circuit in selective cooperation with the resonant storage element which utilizes detection of zero crossings to identify a storage point and a transfer point to store energy in the resonant storage element and to efficiently transfer the stored energy between the resonant storage element and the selective energy circuit, wherein a greater high energy level amplitude of the modulated signal is produced by adding the stored energy into the high energy level upon or after a first zero crossing of the low energy level to the high energy level to generate a steep transition from the low energy level to the high energy level, and wherein the greater high energy level amplitude of the modulated signal increases the overall difference between amplitudes of the high energy level and the low energy level.

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