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:
Nov. 06, 1984
Filed:
Sep. 30, 1982
Densetsukiki Industry Co., Ltd., Tokyo, JP;
Abstract
A device including a main circuit comprising a switching main transistor unit, a smoothing reactor, a smoothing condenser and a commutation diode. To control the conduction and nonconduction of said main transistor unit by means of the output obtained by detecting and amplifying the output voltage of said main circuit, the main transistor unit comprises at least two main transistors connected in parallel with each other. A secondary winding of a current transformer is connected between the bases of the main transistors. A parallel circuit comprising a diode and a condenser is connected between the neutral point of the secondary winding and the emitters of the main transistors. A control circuit comprises two transistors which are conductive and nonconductive alternately and outputs derived from the latter transistors are applied alternately to two primary windings of the current transformer and provision is made to short the ends of the primary winding of the current transformer while the two transistors of the control circuit are both nonconductive.