System string search system using matrix memory?comparator with

Details System string search system using matrix memory?comparator with System string search system using matrix memory?comparator with

1989-08-22

1992-12-29

Lee, Thomas C.

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3642442, 3642445, 3642451, 3642592, 3649291, 3649472, 3649483, 3649510, 3649611, 3649631, 3649652, 3649657, 364DIG1, 3401462, G06F 720, G06F 702

Patent

active

051758601

ABSTRACT:
A symbol string collating apparatus includes a memory unit, a shift register, a collating unit, and an encoder. The memory unit includes memory circuits arranged in a matrix, stores a series of variable-length reference data with reference to a lower bit position of each column of the memory circuits, and stores specific data not including the reference data in a remaining portion. The shift register has the number of stages equal to the number of rows of the matrix and stores variable-length reference data to be collated which is externally input in series to the shift register in units of symbols. The collating unit collates the reference data stored in the shift register with the reference data stored in each column of the memory unit in units of bits. The encoder generates an output signal when at least a part of the reference data coincides with the reference data as a result of collating by the collating unit.

REFERENCES:
patent: 4550436 (1985-10-01), Freeman et al.
patent: 4896133 (1990-01-01), Methvin et al.
patent: 4907194 (1990-03-01), Yamada et al.
patent: 4959811 (1990-09-01), Szczepanek
patent: 5060143 (1991-10-01), Lee
patent: 5119327 (1992-06-01), Skinner

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