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. 12, 1982
Filed:
Jan. 08, 1979
Applicant:
Inventor:
Kazutoshi Yoshida, Mobara, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365-6 ; 365226 ;
Abstract
The driving circuit for supplying current to coils for generating a rotating magnetic field is divided into a switch side circuit and a driver side circuit so as to pass current through only one of the coils. Each of the switch side circuit and the driver side circuit is constituted by a number of component circuits. The driving circuit comprises (N+M) component circuits for driving (N.times.M) coil circuits, where N represents the number of the component circuits of the switch side circuit and M that of the component circuits of the driver side circuit whereby additional coils may be driven without multiplying the number of driving circuits.