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:
Dec. 11, 1979
Filed:
Aug. 10, 1977
Hartmut Seiler, Reutlingen, DE;
Adolf Kugelmann, Leonberg, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
To permit entire integration of a control circuit to switch an inductive load, and protect the integrated control circuit against inductive voltage kicks, voltage surges, and reverse polarity, a series circuit including a diode, which may be constructed as a transistor in diode connection, and a voltage limiting element, typically a Zener diode, or a Zener diode controlled transistor, or four-layer diode are connected in parallel to the main switching path of the semiconductor element which controls current flow through the inductive load, thereby eliminating the necessity of the free wheeling and anti-conductive voltage kick diode which, in combination with the inherent substrate diodes of the inductive circuit, might lead to the damage, or destruction of the IC.