Communications: electrical – Digital comparator systems
Patent
1975-06-16
1976-03-16
Springborn, Harvey E.
Communications: electrical
Digital comparator systems
G11C 700, G11C 2100
Patent
active
039449890
ABSTRACT:
A pattern information memory, provided with a font memory having a total bit capacity of n.A and comprising a number A of circulating memories each having a rewritable n-bit capacity, each bit being capable of storing one dot obtained by dot decomposition from each unit pattern. A minimum unit of designated addresses in the font memory is switched in accordance with a value of a number m (m = 1, 2, 3, . . . less than the number A) to provide a memory capacity of (n.sup.. A)/(n.sup.. m) patterns in combination of a number m of said circulating memories per each pattern of n.sup.. m dots. Writing and reading-out are performed by making once access to a number m of said circulating memories within a unit access time for one bit in a case : m=1. Accordingly, the writing and the reading-out for each pattern information are performed in a constant period of time irrespective of the value of the number m.
REFERENCES:
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patent: 3388383 (1968-06-01), Shivdasani et al.
patent: 3422419 (1969-01-01), Mathews et al.
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patent: 3626824 (1971-12-01), Kolb et al.
patent: 3697958 (1972-10-01), Larew
Adams Bruce L.
Burns Robert E.
Lobato Emmanuel J.
Springborn Harvey E.
Takachiho Koeki Kabushiki Kaisha
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