Magnetic data decoder

Details Magnetic data decoder Magnetic data decoder

G - Physics

11

B

352/54, 354/68,

G11B 5/02 (2006.01) G11B 20/14 (2006.01) H03K 5/1532 (2006.01)

Patent

CA 1097800

MAGNETIC DATA DECODER Abstract of the Invention A data decoder is provided which is useful for decoding data magnetically encoded on a magnetic stripe on the back side of a credit card which may be manually moved through a reader at a variable velocity. The data is decoded by comparing the occurrence of voltage pulses after the onset of a bit interval, representing binary data encoded as magnetic flux changes, with a preselected portion of the measured time duration of the pre- ceding bit interval. If a voltage pulse occurs after the onset but before the end of the preselected portion, the data is deter- mined as à binary "one"; if a voltage pulse occurs after the end of the preselected portion, the data state is determined as a binary "zero". -1-

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