G - Physics – 11 – C
Patent
G - Physics
11
C
352/37.3
G11C 11/14 (2006.01) G11C 19/08 (2006.01) H03B 11/10 (2006.01) H03B 27/00 (2006.01)
Patent
CA 1043907
Abstract The invention relates to a device for generating a time-dependent current in a coil, for example, a magnetic coil. Such a magnetic coil can be used, in combination with a second coil of this kind, for generating rotary magnetic fields in a device for transporting magnetic bubbles along a bubble guide structure consisting of discrete elements on a plate of magnetic material. The device comprises two or more current connection terminals, an LC oscillator circuit, a switching element connected in series with the coil, and a control unit. If the switching element is conductive in the rest state, the control unit controls the quiescent current. When two switching elements are connected in series with the coil which is connected to a current connection terminal of positive and negative polarity, respectively, the quiescent current can have any of two opposite directions. When two magnetic field coils are present, rest magnetic fields in each of the four directions orientated according to a system of axes are possible, whilst from each of these four positions the direction of rotation of the rotary magnetic field can be reversed.
218904
de Niet Edmond
Deurwaarder Marinus A.
Van Den Enden Adrianus W.m.
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