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System for contactless power and data transmission

  • US 5,953,642 A
  • Filed: 04/28/1997
  • Issued: 09/14/1999
  • Est. Priority Date: 10/26/1994
  • Status: Expired due to Term
First Claim
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1. In a system for contactless power and data transmission between a mobile station and a stationary station, the mobile station comprising:

  • a tunable resonant circuit;

    a control circuit driving said resonant circuit, said control circuit having a multiplicity of capacitive circuits including a first capacitor, a second capacitor, a connection node, and at least one switching device;

    said at least one switching device in a given switching state connecting said first capacitor and said second capacitor in series and connecting said resonant circuit in parallel with said series-connected first and second capacitors, and said at least one switching device in said given switching state connecting said connection node between said first capacitor and said second capacitor;

    a device for driving said switching device; and

    a terminal for a reference potential to be connected to said connection node.

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