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Surface and cordless transducer system

  • US 8,022,937 B2
  • Filed: 03/31/2008
  • Issued: 09/20/2011
  • Est. Priority Date: 04/01/2004
  • Status: Active Grant
First Claim
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1. A surface and cordless transducer system, the system comprising:

  • a surface including a position resolving grid, anda transducer including a power receiving circuit, wherein the power receiving circuit responds to an electromagnetic field radiating from the surface and sends a transmit signal, which is received by the position resolving grid and used to determine a position of the transducer relative to the surface,wherein the surface further includes a plurality of power transmission coils, which are distinct from the position resolving grid, for radiating the electromagnetic field, the plurality of power transmission coils being overlapping resonant power transmission coils that are configured to generate current multiplication associated with resonance therein, and are further configured to supply power and data to the transducer.

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