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. 25, 2005
Filed:
Jun. 27, 2003
Felix Franck, München, DE;
Felix Franck, München, DE;
Abstract
The selection of the dead time in the case of a half-bridge inverter influences the efficiency thereof. The optimal dead time, and thus the optimal switching-on time of a lower half-bridge transistor (T) is accomplished according to the invention by virtue of the fact that switching on is delayed until the current in a level shift transistor (T) has dropped below a given threshold. A further aspect of the invention consists in that the delay in switching on the lower half-bridge transistor (T) is immediately suppressed whenever a charging current flows in a trapezoidal capacitor, and this is accompanied by the rise of the half-bridge output voltage (UHB) after the traversal of a minimum.