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. 14, 2003
Filed:
Jun. 05, 2001
Horst Flock, Reutlingen, DE;
Ignaz Fortmeier, Ludwigshafen, DE;
Alcoa Fujikura Gesellschaft mit beschraenkter Haftung, Frankfurt am Main, DE;
Abstract
A control circuit is provided for the power-controlled operation of a load in a portion of a load range. A semiconductor switch is provided which is effective in a load circuit. A drive circuit for the switch generates a control signal. The control signal comprises drive pulses following one another and separated by interpulse periods, for controlling the load in a portion of the load range. In an upper portion of the portion of the load range, the control signal comprises a first pulse signal, with first individual pulses following one another with a first pulse frequency, and a second pulse signal, with second individual pulses following one another with a second pulse frequency in the interpulse periods of the first pulse signal. The second pulse frequency may be greater than the first pulse frequency by at least a factor of 10.