Associative memory with neighboring recirculated paths offset by

Details Associative memory with neighboring recirculated paths offset by Associative memory with neighboring recirculated paths offset by

1976-03-15

1977-12-27

Hecker, Stuart N.

Static information storage and retrieval

Associative memories

Ferroelectric cell

365 78, 365183, G11C 1504, G11C 2100

Patent

active

040657566

ABSTRACT:
This disclosure relates to a charge coupled device memory that is content or associative addressable with the respective word locations (loops) being searched concurrently although word access is serial in manner. Data bits in respective word loops are arranged in a staggered manner such that when the first bit of the first word is at its comparison location, the second bit of the second word is at its comparison location and so forth. The comparand and mask bits are shifted serially from comparison location to comparison location and recirculated in synchronism with the recirculation of the word loops. Content addressing logic includes a series of match bit shift registers, one for each comparison location, to record match occurrences. When a word match occurs, the address of the respective word loop is sent to the memory to read out the data bits stored therein. Various embodiments are disclosed to illustrate that the memory may be formed of any number of word locations having any number of bit positions per word.

REFERENCES:
patent: 3713113 (1973-01-01), Kohzuma et al.
patent: 3997882 (1976-12-01), Goyal
Rux, "A Glass Delay Line Content-Addressed Memory System," IEEE Transactions on Computers, vol. C-18, No. 6, 6/69, pp. 512-520.
Bartlett, et al., "Associative Memory Chips: Fast Versatile-and here," Electronics, 8/17/70, pp. 96-100.
Tsui, "Associative-Memory Sequencing Arrangement," IBM Technical Disclosure Bulletin, vol. 15, No. 7, 12/72, pp. 2342-2343.

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