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. 13, 1976
Filed:
Jul. 23, 1974
Hans Linstedt, Reutlingen, DT;
Helmut Roth, Stuttgart, DT;
Gotz Bundschuh, Gerlingen, DT;
Gerd Hohne, Ludwigsburg, DT;
Bernd Bodig, Leinfelden, DT;
Gert Strelow, Stuttgart, DT;
Peter Schmidt, Munklingen, DT;
Gerhard Sohner, Geradstetten, DT;
Herman Roozenbeek, Schwieberdingen, DT;
Hartmut Michel, Reutlingen, DT;
Robert Bosch G.m.b.H., Gerlingen-Schillerhohe, DT;
Abstract
To improve the operation of semiconductor control ignition systems under widely varying supply voltage conditions, a voltage divider having a division tap point is connected in parallel to the main switching part of the switching transistor of the ignition system, and a voltage breakdown element, typically a Zener diode is connected from the tap point to the control electrodes of the semiconductor switch to provide an additional control voltage thereto if the voltage at the tap point exceeds a value leading to breakdown of the breakdown device (Zener diode); the main control circuit for the main ignition transistor may be conventional.