Apparatus and method for reading binary data from a magnetic str

Details Apparatus and method for reading binary data from a magnetic str Apparatus and method for reading binary data from a magnetic str

1994-01-19

1995-09-19

Sniezek, Andrew L.

Dynamic magnetic information storage or retrieval

Recording on or reproducing from an element of diverse utility

Card

360 51, 360 53, 235449, G11B 2504, G11B 509

Patent

active

054521432

ABSTRACT:
A magnetic data reader and method for reading magnetic data from a stripe of passenger tickets while avoiding erroneous encoding of clock data which causes a read error. A CPU controls the counter value adder to acquire a reference time by summing up values of an interval time calculated from two or more bits of clock data and averaging the added value. If the binary data change within the clock data window and the corresponding interval time exceeds the permissible range of the prescribed reference time, the CPU restarts a demodulation operation by resetting a demodulator circuit.

REFERENCES:
patent: 3882301 (1975-05-01), Nassimbene
patent: 3995145 (1976-11-01), Harris, III
patent: 4578720 (1986-03-01), Matsumoto
patent: 4678897 (1987-07-01), Lewiner et al.
patent: 5285328 (1994-02-01), Behr et al.
patent: 5291005 (1994-03-01), Ishii et al.

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