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Capacitive coupling type data transmission circuit for portable electronic apparatus

  • US 4,763,340 A
  • Filed: 12/19/1984
  • Issued: 08/09/1988
  • Est. Priority Date: 12/22/1983
  • Status: Expired due to Term
First Claim
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1. A data transmission system for an electronic apparatus comprising:

  • input means for inputting a data signal to be transmitted;

    capacitance changing means responsive to said input means and being operable to change its capacitance value according to the value of said data signal;

    transmitting means and receiving means, said transmitting means responsive to said capacitance changing means for capacitively coupling the capacitance value of said capacitance changing means to said receiving means,said receiving means for sensing the capacitance value from said transmitting means; and

    detecting means in said receiving means for detecting the capacitance value of said capacitance changing means and generating an output signal of the data signal inputted to said input means.

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