Magnetic character recognition system employing a dynamic thresh

Details Magnetic character recognition system employing a dynamic thresh Magnetic character recognition system employing a dynamic thresh

1976-10-07

1977-07-05

Boudreau, Leo H.

Communications: electrical

Digital comparator systems

G06K 900

Patent

active

040343421

ABSTRACT:
An improved magnetic character recognition system employing a linearly operated dynamic or variable threshold voltage determination system and signal deterioration compensation circuits for expanding the range of dynamic information signals to which the dynamic threshold voltage determination system reliably responds to accommodate magnetically encoded characters that produce an unusually high or low strength magnetic flux for producing digital output pulses of uniform width throughout the expanded information signal range.

REFERENCES:
patent: 3159815 (1964-12-01), Groce
patent: 3568151 (1971-03-01), Majima
patent: 3668634 (1972-06-01), Kruklitis
patent: 3675201 (1972-07-01), McKissick et al.

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