Magnetic stripe card reader

摘要

A magnetic stripe card reader useful for reading magnetic stripe bearing cards having at least one magnetic track, the magnetic stripe reader including a magnetic stripe reader head including multiple magnetic sensors including at least one magnetic track reading sensor for reading data encoded in a magnetic track of a magnetic stripe and at least one magnetic sensor which does not read encoded data, the magnetic stripe reader head providing magnetic sensor outputs including at least one magnetic track sensor reading output and at least one magnetic sensor output which has no encoded data therein and a subtractor operative to subtract at least a portion of the at least one magnetic sensor output, which has no encoded data therein, from the at least one magnetic track sensor reading output having card data encoded thereon, thereby to cancel interference from the at least one magnetic track reading output.

主权项

1. A magnetic stripe card reader useful for reading magnetic stripe bearing cards having at least one magnetic track, said magnetic stripe reader comprising:
a magnetic stripe reader head comprising multiple magnetic sensors including at least one magnetic track reading sensor for reading data encoded in a magnetic track of a magnetic stripe and at least one magnetic sensor which does not read encoded data, said magnetic stripe reader head providing magnetic sensor outputs including at least one magnetic track sensor reading output and at least one magnetic sensor output which has no encoded data therein; and a subtractor operative to subtract at least a portion of said at least one magnetic sensor output, which has no encoded data therein, from said at least one magnetic track sensor reading output having card data encoded thereon, thereby to cancel interference from said at least one magnetic track reading output.