Integrated circuit card system and a data transmission method thereof
First Claim
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1. An integrated circuit card system, comprising:
- a radio frequency (RF) integrated circuit configured to wirelessly communicate with an integrated circuit card reader; and
an integrated circuit card connected to the RF integrated circuit by a single wire, the integrated circuit card configured to change an amount of current of a data signal output from the integrated circuit card according to a transmission speed of a data signal input to the integrated circuit card from the RE integrated circuit, wherein the integrated circuit card comprises;
a transmission speed calculator configured to determine the transmission speed of the input data signal;
a current driver configured to provide the current corresponding to the output data signal;
a transistor connected between the current driver and a ground voltage, the transistor configured to be controlled by the output data signal,wherein the transmission speed calculator is configured to control the current provided by the current driver according to the transmission speed of the input data signal.
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Abstract
An integrated circuit card system that includes a radio frequency (RF) integrated circuit configured to wirelessly communicate with an integrated circuit card reader; and an integrated circuit card, which is connected to the RF integrated circuit by a single wire, the integrated circuit card configured to change an amount of current of a data signal output from the integrated circuit card according to a transmission speed of a data signal input to the integrated circuit card from the RF integrated circuit.
16 Citations
15 Claims
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1. An integrated circuit card system, comprising:
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a radio frequency (RF) integrated circuit configured to wirelessly communicate with an integrated circuit card reader; and an integrated circuit card connected to the RF integrated circuit by a single wire, the integrated circuit card configured to change an amount of current of a data signal output from the integrated circuit card according to a transmission speed of a data signal input to the integrated circuit card from the RE integrated circuit, wherein the integrated circuit card comprises; a transmission speed calculator configured to determine the transmission speed of the input data signal; a current driver configured to provide the current corresponding to the output data signal; a transistor connected between the current driver and a ground voltage, the transistor configured to be controlled by the output data signal, wherein the transmission speed calculator is configured to control the current provided by the current driver according to the transmission speed of the input data signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification