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 1043906
ABSTRACT: The invention relates to a device for generating time-dependent currents in a coil, for example, a magnetic coil. A magnetic coil of this kind can be used, in combination with a second similar coil, for generating rotary magnetic fields in a device for transporting magnetic bubbles along a guide structure, consisting of discrete elements, on a plate of magnetic material. The device comprises two or more current connection terminals, an LC series oscillator circuit and a switching element which is connected in series with the coil. If the switching element is opened for a period of time amounting to one half to one whole oscillator period, the oscillator performs a whole period. A short-circuit element, connected parallel to the capacitor, can fully discharge the capacitor. When two switching elements are connected between a connection of the coil and a positive and a negative current connection terminal, respectively, whilst the other connection of the coil is connected to an earth terminal, oscillations at a phase difference of 180° can occur. In that case two short-circuit elements are required. A second magnetic field coil can be energized by a device which continous to energize the coil in the rest state, so that the direction of rotation of the rotary magnetic field can be reversed.
218903
de Niet Edmond
Van Den Enden Adrianus W.m.
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