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. 19, 2019
Filed:
Apr. 10, 2014
Protective circuit for a signal output stage in event of faulty contacting of electrical connections
Ifm Electronic Gmbh, Essen, DE;
Heinz Walter, Hergatz, DE;
IFM ELECTRONICS GMBH, , DE;
Abstract
A protective circuit for protecting an output stage in the event of faulty contacting of the electrical connections, wherein the output stage includes a driver unit and has an analog or digital signal output is provided. Accordingly, in order to protect the output stage from a faulty connection in a simple and economical manner, the protective circuit comprises a first transistor circuit, which is connected in series between the output stage and the signal output, and a second transistor circuit, which is connected in series between the negative supply connection and the signal output. The second transistor circuit is connected to the base of the first transistor circuit in order to influence the first transistor circuit in such a way that the first transistor circuit becomes highly resistive in the event of a fault.