Communications: electrical – Digital comparator systems
Patent
1975-10-23
1977-08-09
Habecker, Thomas B.
Communications: electrical
Digital comparator systems
333 7R, G11C 1102
Patent
active
040414787
ABSTRACT:
The invention relates to a plate of magnetic material wherein magnetic domains can be formed and driven along guide structures consisting of discrete elements of magnetizable material, for example, vapor-deposited permalloy. The plate is used as a memory, a number of mainly parallel extending input structures forming paths for the domains between relevant outputs of the memory and relevant inputs of a decoding device. The decoding device comprises delay elements which can each be activated by a specific rotary field sequence. The output of the decoder device has connected thereto a detection element which can thus selectively detect a domain from a predetermined input structure, because exactly for the relevant domain a synchronization exists between a part of the rotary field sequence and the arrival of the relevant domain at a delay element. Therefore, neither further current wires are required for activating the decoding device, nor separate detection lines for detectors which are selective per input structure. A number of simple delay elements which have a compact construction and which can be readily activated are described.
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patent: 3737882 (1973-06-01), Furuoya
patent: 3751597 (1973-08-01), Bonyhard
patent: 3770895 (1973-11-01), Krupp
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patent: 3786428 (1974-01-01), Takahashi
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de Niet Edmond
Druyvesteyn Willem Frederik
Kuipers Franciscus Antonius
VAN DEN Enden Adrianus Wilhelmus Maria
Habecker Thomas B.
McGlynn Daniel R.
Trifari Frank R.
U.S. Philips Corporation
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