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Multifunction input device

  • US 6,417,846 B1
  • Filed: 02/02/2000
  • Issued: 07/09/2002
  • Est. Priority Date: 02/02/2000
  • Status: Expired due to Fees
First Claim
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1. A multifunction input device comprising a double-loop conductor array, at least one input medium, and a data processing circuit, wherein said double-loop conductor array comprising a capacitive sensor area loop arranged at an upper side and an alternate sensor area loop arranged at a lower side below said capacitive sensor area loop for detecting the position of said at least one input medium and calculating XYZ coordinate value of each input medium;

  • said at least one input medium causes conductors of said double-loop conductor array to produce induction current and static current when closing/touching a surface of said double-loop conductor array;

    said data processing circuit comprising frequency transmitting and receiving circuit means and scanning circuit means to scan position of said at least one input medium, signal amplify circuit means to amplify signal obtained from said frequency transmitting and receiving circuit means and scanning circuit means, noise eliminating circuit means to eliminate noise from amplified signal obtained from said signal amplify circuit means, sample hold circuit means to hold signal obtained from said noise eliminating circuit means, analog/digital converter means to convert signal obtained from said sample hold circuit means into digital signal, a CPU (central processing unit) to calculate data of digital signal obtained from said analog/digital converter means into XYZ coordinate value corresponding said at least one input medium, computer interface means, a model set buffer controlled to set said computer interface means for the transmission of said XYZ coordinate value to the receiver unit of a host computer through an interface.

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