Capacitive coupling type data transmission circuit for portable electronic apparatus
First Claim
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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Accused Products
Abstract
A capacitive type coupling data transmission system for portable electronic apparatus is comprised of an input circuit, a capacitance changing circuit, a transmitting circuit capacitively coupled to, a receiving circuit, and a detecting circuit for detecting any change in the capacitance changing circuit. A data signal to be transmitted is inputted into the input circuit. Based on the value of an inputted binary digital data signal, the capacitance of the capacitance changing circuit is changed. The capacitance change is capacitively transmitted from the transmitting circuit to the receiving circuit and detected thereat. The detecting circuit may be an oscillator circuit, a an RC differentiating circuit, or an RC integrating circuit.
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Citations
10 Claims
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1. A data transmission system for an electronic apparatus comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A capacitive coupling type data transmission system for an electronic apparatus comprising:
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input means for accepting a digital data input signal to be transmitted; capacitance means coupled to said input means and being responsive to said input signal to change its capacitance value according to the digital value of said input signal; transmitting means and receiving means, said transmitting means coupled to said capacitance means for capacitively coupling the capacitance value of said capacitance means to said receiving means; said receiving means for sensing the capacitance value coupled thereto; and detecting means in said receiving means for detecting the capacitance value of said capacitance means and generating a digital data output signal of said input signal.
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Specification