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:
Sep. 10, 2002
Filed:
Oct. 30, 2000
Randhir S. Malik, Cary, NC (US);
William Hemena, Raleigh, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A single stage power factor correction circuit is disclosed. The circuit comprises a first comparator for receiving an output voltage and a reference voltage and for providing a control voltage, a multiplier coupled to the first comparator for receiving the control voltage and an input voltage and then providing a sine wave voltage and a control portion coupled to the multiplier for controlling the sine wave voltage and providing a regulated DC output. Through the use of the circuit in accordance with the present invention, circuit efficiency is increased and the number of circuitry components is reduced. By reducing the number of circuitry components a significant reduction in manufacturing costs is achieved.