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Device and method for contactless transmission of power or data

  • US 20030006880A1
  • Filed: 08/19/2002
  • Published: 01/09/2003
  • Est. Priority Date: 05/24/1996
  • Status: Active Grant
First Claim
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1. A device for contactless transmission of power or data, comprising:

  • an impedance;

    a resonant circuit generating an alternating magnetic field as a result of oscillation for transmitting power or data, or excited to oscillation by an external alternating magnetic field for receiving power or data, said resonant circuit excited to oscillation at an excitation frequency, and said resonant circuit having components determining a resonant frequency continuously altered by switching in said impedance and matched to the excitation frequency; and

    a timing control unit for switching said impedance into said resonant circuit only in a phasewise manner in dependence on a difference between the resonant frequency and the excitation frequency in each case within a period of the oscillation.

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