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:
Apr. 22, 1986
Filed:
Feb. 27, 1984
Applicant:
Inventors:
Alexander G MacInnis, Cary, NC (US);
William B Nunnery, Cary, NC (US);
Assignee:
International Business Machines Corp., Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02M / ;
U.S. Cl.
CPC ...
363 25 ; 363 56 ;
Abstract
A method and apparatus for controlling a power supply which includes a power transformer having primary and secondary windings and switching transistors for switching current through the windings. The apparatus includes circuitry for generating a composite signal representative of the flux and magnetizing current (I.sub.m) in the power transformer. The composite signal is correlated with a multiphase clocking signal to generate a pulsewidth modulated (PWM) signal which is used to drive the switching transistors.