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:
Feb. 15, 1977
Filed:
Oct. 09, 1975
Rudolf Blum, Wendlingen, DT;
Robert Bosch G.m.b.H., Stuttgart, DT;
Abstract
To prevent transfer of stray pulses from the ignition system to test apparatus, a pulse-shaping circuit is connected between the output of the ignition system and the test apparatus itself which includes a semiconductor switch providing an output signal to the test apparatus upon change of state thereof, and a charge storage circuit connected to the coupling element of the test system to the ignition system and to the semiconductor switch, the charge storage circuit having a short loading time and a re-loading or discharge time which is long with respect to the loading time thereof to rapidly transfer pulses to the switch and cause rapid change of state thereof while slowly unloading the charge and prevent further change of state of the switch during the unloading time, and thus suppress and eliminate stray pulses.