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. 14, 2009
Filed:
Nov. 14, 2005
Applicant:
Edward P. Coleman, Salt Springs, FL (US);
Inventor:
Edward P. Coleman, Salt Springs, FL (US);
Assignee:
Asahi Kasei Microsystems Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/656 (2006.01); G05F 1/613 (2006.01);
U.S. Cl.
CPC ...
Abstract
Power converters employing extrapolative conductance mode (ECM) control utilize periodic current sampling and employ an extrapolation method to determine charge pulse duration. In preferred embodiments, the operating frequency of the converter is altered in response to current sample perturbations to dissipate sub-harmonic oscillations associated with duty cycles of 50% or greater without the use of slope correction. High current monitor signal-to-noise ratios may be achieved in conjunction with low power losses, and a first order output filter response may be obtained for duty cycles greater than 50%.