Static information storage and retrieval – Associative memories – Ferroelectric cell
Patent
1979-06-25
1981-03-03
Fears, Terrell W.
Static information storage and retrieval
Associative memories
Ferroelectric cell
307238, 364513, 371 10, G11C 1300, G06F 1110
Patent
active
042544769
ABSTRACT:
An associative processor for searching data stored in memory to identify messages or other data containing operator selected keywords containing alpha-numeric or other characters is disclosed. The identified messages or other data are then transferred from the memory to an output device for review. The processor comprises a plurality of commercially available integrated circuit random access memories (RAMs) for performing processing functions. The binary words read out of the RAMs are applied via a register to the higher order addressing inputs of the same RAMs without any processing. Messages being searched for keywords are applied to the lower order addressing inputs of the same RAMs. A binary word applied to the higher order addressing inputs of the RAM memory selects a block of memory bits with each bit being associated with a different character. Only memory bits within a selected block of memory bits corresponding to keyword characters being searched for contain binary words indicating the block of bits for the subsequent keyword character to be searched for. When a character being searched for is detected, the binary word in the corresponding memory location is read out and applied to the higher order memory inputs via a register. This causes the next block of memory bits to be addressed to await receipt and detection of the next keyword character. After detecting all the characters of a keyword, an output is provided from the RAM memory which causes the stored message containing the selected keyword or words to be transferred to the output device for operator review.
REFERENCES:
patent: 4058851 (1977-11-01), Scheuneman
Etlinger Louis
Fears Terrell W.
Funk Joseph E.
Sanders Associates Inc.
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