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. 11, 2006
Filed:
Mar. 11, 2004
Takeshi Uematsu, Tokyo, JP;
Hiroshi Kawasaki, Tokyo, JP;
Takakazu Imai, Tokyo, JP;
Koichiro Miura, Tokyo, JP;
Ken Matsuura, Tokyo, JP;
Takeshi Uematsu, Tokyo, JP;
Hiroshi Kawasaki, Tokyo, JP;
Takakazu Imai, Tokyo, JP;
Koichiro Miura, Tokyo, JP;
Ken Matsuura, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A controllerA for generating a drive signal (PWM signal) PS for controlling a switching power supply, comprises control signal setting meansfor setting a control signal CS on the basis of an output voltage Vo and a target voltage Vr; current estimating meansfor estimating an inductor current on the basis of the drive signal PS and for generating an estimated current signal PC; DC component removing meansfor extracting a DC component DC included in the estimated current signal PC and for removing the DC component DC from the estimated current signal PC; DC component resetting meansfor resetting the extracted DC component DC every predetermined time; and comparing meansfor comparing the control signal CS with the estimated current signal PC' after the removal of the DC component DC.