Static information storage and retrieval – Read/write circuit – Differential sensing
Patent
1979-05-29
1983-02-15
Moffitt, James W.
Static information storage and retrieval
Read/write circuit
Differential sensing
365130, 365243, G11C 508, G11C 702, G11C 1106
Patent
active
043744320
ABSTRACT:
Organizations are disclosed for driving bit lines of a two-line 21/2D coincident current magnetic core memory in which a bit line not used for reading a bit out of a core is placed physically in parallel with the bit line driven by half select current to approximate in the unused line the capacitive and inductive coupling of the driven line with the word drive line. That coupling produces in the unused line the same noise (crosstalk) produced in the driven bit line by the word drive pulse. The crosstalk signal in the unused line is subtracted from the signal in the driven bit line before amplification and detection. The unused line may be a separate dummy line, or simply another bit line not being used for the bit being read out. In the case of paired bit lines used for common mode rejection of the bit drive signal, a second pair of unused bit lines is arranged in parallel for crosstalk cancellation.
REFERENCES:
patent: 3504356 (1970-03-01), Patel et al.
patent: 3510856 (1970-05-01), Cline
patent: 3648259 (1972-03-01), Fisher et al.
patent: 3651497 (1972-03-01), Cook
Conaway John R.
Kenner Bernard A.
Electronic Memories and Magnetics Corporation
Moffitt James W.
Scholnick Seymour A.
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