Dynamic magnetic information storage or retrieval – General recording or reproducing – Signal switching
Patent
1990-11-30
1992-09-01
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
General recording or reproducing
Signal switching
360 67, G11B 509, G11B 1514
Patent
active
051445026
ABSTRACT:
A read head arrangement comprising n first read heads (h.sub.a.1, . . . , h.sub.a.n) and n second read heads (h.sub.b.1, . . . , h.sub.b.n) of the magnetoresistance type, n transistors (Tr.sub.1, . . . , Tr.sub.n) and switching means (S), where n is an integer greater than two. The first main electrode (collector) of a transistor (Tr.sub.i) is coupled to an i-th output (U.sub.i) of the arrangement. The second main electrode (emitter) of the transistor (Tr.sub.i) is coupled to a first terminal (t.sub.1) of a first read head (h.sub.a.i) and a second read head (h.sub.b.i). The second terminal (t.sub.2) of the first read head (h.sub.a.1) is coupled to a first terminal (a) of the switching means (S). The second terminal (t.sub.2) of the second read head (h.sub.b.1) is coupled to a second terminal (b) of the switching means (S), of which a third terminal (c) is coupled to a point of constant potential (earth), while i ranges from 1 to n.
REFERENCES:
patent: 4044387 (1977-08-01), Watkins
patent: 4616272 (1986-10-01), Moriyama
patent: 4685005 (1987-08-01), Fields Jr.
Canney Vincent P.
Fox John C.
U.S. Philips Corporation
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