21/2D Core memory

Static information storage and retrieval – Systems using particular element – Three-dimensional magnetic array

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

G11C 1100

Patent

active

RE0303950

ABSTRACT:
A large, 2 wire, 21/2D core memory includes four, 1K (1024) by 1280, core frames with 1280 Y conductors each stringing and inductively coupling a column of 1024 cores in each of the four frames and 4K orthogonal X conductors each stringing and inductively coupling one row of 1280 cores. A word position within the memory is defined by 5 pairs of Y conductors, a corresponding X conductor from each frame, and selection of relative current directions in the Y conductors. Reading of a 20 bit word is accomplished with 5 sense amplifiers in four rapid sucession read sub-operations. Writing is accomplished in two sub-operations by separately controlling partial select digit currents in each of the 5 pairs of Y conductors. A bidirectional X drive and switching arrangement utilizes overlapping X drive currents and shared circuitry to maximize memory speed and reduce electronic components costs.

REFERENCES:
patent: 3181129 (1965-04-01), Freedman
patent: 3466630 (1969-09-01), Mayne et al.
patent: 3466633 (1969-09-01), Gilligan et al.
patent: 3484763 (1969-12-01), Genke et al.
patent: 3500359 (1970-03-01), Hsieh et al.
patent: 3587068 (1971-06-01), Strawbridge
"Novel Low Cost Design for 21/2D Storage Systems", Harding et al., Bell Telephone Lab. Inc. 1968.
"Novel Low Cost Design for 21/2D Storage Systems", Harding et al., International Solid-State Circuits Conference, 2/67.
"A 2.5D Ferrite Memory Sense Amplifier", Patel et al., IEEE Journal of Solid State Circuits, vol. SC-1, #1 Sep. 66.
"20 Million Bir High Speed Core Memory", Norman, Computer Design pp. 54-60, Dec. 67.
"First-and Second-Order Ferrite Memory Core Characteristics and Their Relationship to System Performance", J.R. Brown, Jr., IEEE Transactions on Electronic Computers, pp. 485-501, 8/66.
"Ferrite-Core Memories", R. A. Hill, Electronics World, Oct. 1970, pp. 49-52.
"21/2D High Speed Memory Systems-Past, Present & Future," T. J. Gilligan, IEEE Trans. on Computers, vol. EC-15 #4, 8/66.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

21/2D Core memory does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with 21/2D Core memory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 21/2D Core memory will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1702443

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.