Baud rate modulating magnetic stripe data transmitter, system, and method
AssigneeSamsung Electronics Co., Ltd.
InventorEnyang HUANG
Life of this patent
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Abstract
A contactless payment device and method transmits a sequence of magnetic-field pulses directly to two or three magnetic-stripe read heads of a point-of-sale terminal. The baud rate at which the data is transmitted is modulated so that track data for one read head channel will be ignored by another read head channel, based on the change to the baud rate and/or the rate of change in the baud rate to improve acceptance of the transmitted pulses received by the read heads of the point-of-sale terminal.
Claims20
A contactless magnetic stripe data transmission method, comprising:
- generating a first bit sequence based on a first data associated with a first track of a magnetic stripe;
- generating a second bit sequence based on a second data associated with a second track of the magnetic stripe, the first and second tracks being different;
- driving an inductor to transmit the first bit sequence and the second bit sequence in series as magnetic pulses;
- and
- modulating a transmission rate of the second bit sequence, as transmitted, from a first baud to a second baud, the first and second baud being different.
A contactless magnetic stripe data transmission device comprising:
- a controller that outputs a data signal based on magnetic stripe data;
- a logic circuit and driver converting the data signal into a time-variable electric signal;
- an inductor that emits magnetic pulses in response to the time-variable electric signal;
- and
- a memory storing instructions to be executed by the controller to:
- generate a first bit sequence based on a first data associated with a first track of a magnetic stripe,
- generate a second bit sequence based on a second data associated with a second track of the magnetic stripe, the first and second tracks being different,
- drive the inductor to transmit the first bit sequence and the second bit sequence in series as magnetic pulses, and
- modulate a transmission rate of the second bit sequence, as transmitted, from a first baud to a second baud, the first and second baud being different.
Dependencies are inferred from the claim text.