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:
Mar. 28, 1995
Filed:
Dec. 22, 1992
Applicant:
Inventors:
Shunro Mori, Tenri, JP;
Toshihide Miyake, Nara, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01H / ;
U.S. Cl.
CPC ...
361159 ;
Abstract
A damping circuit includes two circuits. Each circuit has a PNP transistor, an NPN transistor, and a shunt resistor. The PNP transistors are connected in series to the NPN transistors through level shift stages. The PNP transistor and the NPN transistor have emitter functions of the same area. The shunt resistors are connected to the emitters of the NPN transistors. Both of the two circuits are connected to a coil in parallel in such a manner that the two circuits have opposite polarities to each other about the coil.