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. 29, 2000
Filed:
Jul. 02, 1998
Wolfgang Gscheidle, Oberstenfeld, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A surge protection circuit that can be used, in particular, for monitoring and protecting a diagnostic interface, such as, for example, the SAE J 1708 diagnostic interface. A shared surge detection device, which generates a switch-off threshold voltage, receives the input signals of two input lines with the help of a diode combination. When a surge condition occurs in at least one input voltage, the surge detection device places one of the MOS field-effect transistors connected into the input line in a non-conductive state so that a high-resistance interrupt of the input signal lines, connected on the output side to an integrated interface circuit, is produced. In normal operation, i.e., when no surge condition occurs, the two MOS field-effect transistors produce a low-resistance, i.e., basically no-loss, conduction of the input signals in both directions.