Differential magneto-resistive detector for cross-tie wall memor

Details Differential magneto-resistive detector for cross-tie wall memor Differential magneto-resistive detector for cross-tie wall memor

1979-02-23

1981-01-20

Curtis, Marshall M.

Static information storage and retrieval

Magnetic bubbles

Detectors

365 38, 365 87, G11C 1102

Patent

active

042466474

ABSTRACT:
A method of and an apparatus for magneto-resistively detecting information in a cross-tie memory system is disclosed. The detector includes a first conductive element, which is the terminating portion of an electrically-conducting wide-narrow edged propagating drive line, and second and third conductive elements that are serially aligned along a magnetic, serrated-edged data track, which three conductive elements form two gaps therebetween. The two gaps are oriented along the data track at respective narrow portions, a first narrow portion which may support a cross-tie but which second narrow portion will not support a cross-tie. A differential sense amplifier is coupled across the two gaps using the second narrow portion as a reference segment to differentially detect the presence vel non of a cross-tie in the first narrow portion.

REFERENCES:
patent: 4024516 (1977-05-01), Torok
patent: 4075612 (1978-02-01), Johnson et al.
Crosstie Memory Simplified by Use of Serrated Strips, Schwee et al., Nav. Surf. Weapons Ctr.; 624-625; 12/75
Progress Toward Crosstie Memory V; Schwee et al., NSWC/WOL TR 78-11; pp. 1-17; Jan. 1978.

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