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:
Apr. 17, 2001
Filed:
Mar. 30, 2000
Applicant:
Inventor:
Robert Murr, Barbing, DE;
Assignee:
Siemens Aktiengesellschaft, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03B 1/00 ; H03K 3/00 ;
U.S. Cl.
CPC ...
H03B 1/00 ; H03K 3/00 ;
Abstract
When a short-circuit transistor is switched on, an impedance of an emitter-collector path through a switching transistor in a driver stage becomes higher as a load current becomes greater, and the load current and power loss in the switching transistor thus become lower. This effect is increased by connecting a voltage divider in parallel with the emitter-collector path through the switching transistor, by a parallel transistor. When the switching transistor is switched off, the parallel transistor blocks the current path via the voltage divider and the load for undesirable residual currents.