The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 06, 1987
Filed:
May. 07, 1984
Kousuke Takahashi, Tokyo, JP;
Hachiro Yamada, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In a Bloch line pair driving device comprising an inductor circuit which has first and second ends and which generates a magnetic field in a predetermined direction to drive each Bloch line pair transversely of the predetermined direction, a first switch is connected to the second end and is put in an on state to gradually increase an electric current flowing from a first voltage source through the inductor circuit in a preselected sense. Gradual growth of the magnetic field results from the gradual increase of the electric current and keeps each Bloch line pair stable at each position. A current path circuit is connected to the second end along with a second voltage source providing a second voltage different from the first voltage, and is put in an active state during an off state of the first switch. The active state of the current path circuit brings about a quick decrease of the magnetic field to propagate each Bloch line pair from each position. A second switch may be connected between the first end and the first voltage source to expedite the quick decrease of the magnetic field. An additional electric current may be caused to flow through the inductor circuit in a sense opposite to the preselected sense through third and fourth switches which are connected to the first and the second ends, respectively. An additional current path circuit is connected between the first end and the second voltage source to be put in an active state during an off state of each of the third and the fourth switches.