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PERIODIC BANDWIDTH WIDENING FOR INDUCTIVE COUPLED COMMUNICATIONS

  • US 20160315670A1
  • Filed: 06/30/2016
  • Published: 10/27/2016
  • Est. Priority Date: 12/31/2014
  • Status: Active Grant
First Claim
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1. A method of resonant inductive coupled communication, responsive to oscillations generated by a modulated carrier signal from a first resonant tank (first tank) that is tuned to a first resonant frequency and that includes first antenna coils, a first capacitor coupled in parallel to the first antenna coils, a first resistor coupled in series between the first antenna coils, and a first switch coupled in series between the first antenna coils, the first antenna coils transmitting a predetermined number of carrier frequency cycles for providing data that is first transition coded, and the first switch being activated for widening a bandwidth and changing a Q factor of the first tank after the predetermined number of carrier frequency cycles, the method comprising:

  • responsive to the oscillations in the first tank, beginning induced oscillations in a second resonant tank (second tank) tuned to a second resonant frequency essentially equal the first resonant frequency and that includes;

    a second antenna coil that is separated from the first antenna coils by a distance that provides near-field communications;

    a second capacitor coupled in parallel to the second antenna coil; and

    a second switch coupled in parallel to the second antenna coil; and

    with a receiver sense circuit, responsive to detecting a bit associated with the induced oscillations of the second tank, activating the second switch for widening a bandwidth and changing a Q factor of the second tank, and resetting the receiver sense circuit.

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