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:
Jul. 31, 1990
Filed:
Feb. 26, 1988
Pradeep M Bhagwat, Baltimore, MD (US);
Black & Decker Inc., Newark, DE (US);
Abstract
A voltage converter (100) converts a high voltage, low frequency input to a low D.C. voltage output. The input is rectified to facilitate the operation of an oscillator (202) which operates alternately a pair of MOSFETS (124 and 126). Upon operation of MOSFET (124), the intermediate D.C. voltage is applied across and directs current in one direction through a primary winding (132) of a high frequency step-down transformer (134) and also charges a series-connected capacitor (152). Upon operation of MOSFET (126), capacitor (152) discharges to provide current through primary winding (132) in the opposite direction. In this manner, an alternating voltage at a high frequency is stepped down to a secondary winding (142) of transformer (134) and is rectified to provide the low D.C. voltage output. Diodes (120 and 122) prevent undesirable oscillations within voltage converter (100) if a short should occur in any load connected to the output of the converter.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile