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:
Jan. 03, 2006
Filed:
Nov. 20, 2002
Jan Reinder DE Boer, Drachten, NL;
Jan Reinder De Boer, Drachten, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
The invention relates to a switched mode power supply with current mode control, in which an inductive element () is connected to a power source () by means of a controllable switch (). During closure of the switch () the increasing current through the inductive element () is sensed by a current sensor () and compared with a reference signal (). When the signal from the current sensor is equal to the reference signal, the switch () is opened. Due to circuitry delays the off-switching of the switch () occurs at a higher current level than sensed by the current sensor (). To compensate for this effect the switched mode power supply has means () for generating a compensation signal (Ic*R) proportional to the gradient (di/dt) of the current i through the inductive element (). The circuitry delay can be compensated for by a suitable choice of values of components ().