Digital data memory unit and memory unit array

Details Digital data memory unit and memory unit array Digital data memory unit and memory unit array

1992-03-13

1993-10-26

Clawson, Jr., Joseph E.

Static information storage and retrieval

Associative memories

Ferroelectric cell

365162, 36518907, 365195, 365203, 365233, G11C 1500

Patent

active

052572200

ABSTRACT:
A digital data memory unit and memory unit array, each unit of which can be searched in accordance with the contents thereof and updated, utilizes a digital storage element in the form of a register, latch, or memory cell, a comparator and control logic. Data is presented to the units in parallel on data lines and compare data is supplied in parallel to the units along other data lines. Parallel search of data in each unit, with multiple updates in units where the stored data matches the compare data, occurs rapidly and in one clock cycle (e.g., approximately 50 nanoseconds). The control logic responds to a match output from the comparator and an update enable pulse to enable a new data word on the data lines to be written into the digital storage element of the unit. The memory unit array is useful in image processing for storing pixel values and searching and updating these values in the process of image analysis to recognize certain images.

REFERENCES:
patent: 4780845 (1988-10-01), Threewit
patent: 4928260 (1990-05-01), Chuang
patent: 5036486 (1991-07-01), Noguchi et al.

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