Magnetic recording circuit for toll road ticket

Details Magnetic recording circuit for toll road ticket Magnetic recording circuit for toll road ticket

1993-02-25

1995-10-03

Hajec, Donald

Registers

Systems controlled by data bearing records

Transportation

360 2, G11B 2504

Patent

active

054554080

ABSTRACT:
A circuit for reading a toll road ticket in which a mark for magnetic recording density discrimination formed on a ticket is detected and a magnetic record demodulating circuit is selected in accordance with the result of detection. The circuit is a digital recording circuit and reproducing circuit for a magnetic card utilizing modified frequency modulation. In a toll receiving system of a toll road, coexistence of tickets adopting different magnetic recording densities or recording systems is made possible.

REFERENCES:
patent: 4024379 (1977-05-01), Pfost et al.
patent: 4319287 (1982-03-01), Swenson
patent: 4523181 (1985-06-01), Taraki et al.
patent: 4553131 (1985-11-01), Endoh
patent: 4571575 (1986-02-01), McCullough
patent: 4962301 (1990-10-01), Rokutan
patent: 5005184 (1991-04-01), Amano et al.
patent: 5222058 (1993-06-01), Oshiba

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