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. 28, 1986
Filed:
Oct. 11, 1983
Applicant:
Inventors:
Bernd Kalkhof, Reutlingen, DE;
Karl Nagel, Gomaringen, DE;
Assignee:
Robert Bosch GmbH, Stuttgart, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H / ;
U.S. Cl.
CPC ...
361 18 ; 361 98 ; 323315 ; 323312 ;
Abstract
To limit the current through the emitter-collector path of an output transistor, typically a Darlington transistor pair (T7, T8) to a load, in case of short circuit or malfunction of the load (L), in which a control circuit path resistor (R1) is serially connected with the emitter-collector path of the output transistor and the load, a reference current source is provided, connected to have current flow additionally through the resistor (R1) and providing control current to the output transistor at a control terminal (2) thereof, thereby permitting self-regulation of output current to a safe level regardless of reflected load resistance.