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:
Sep. 24, 2002
Filed:
May. 23, 2001
Helmut Schmied, Marbach, DE;
Bernd Bireckoven, Kusterdingen, DE;
Hans Berkemer, Grossglattbach, DE;
Hartmut Michel, Reutlingen, DE;
Robert Bosch GmbH, , DE;
Abstract
Described is a control circuit for an output stage for suppressing electrical and electromagnetic interference having a signal input (I), a signal output (O), and a ground terminal, two switch stages ( ) which are connected to the signal input (I) and the ground and which have one control terminal and one output terminal each, each switch stage ( ) switching over from a first state in which the potential at the output terminal follows the potential at the signal input (I) to a second state in which the potential at the output terminal is drawn to ground when a first or second threshold value (U , U ) is exceeded at its control terminal, the control terminal ( ) of the first switch stage ( ) being connected to an intermediary potential, which is between the potential at the signal input (I) and ground, the output terminal ( ) of the first switch stage ( ) forming the control terminal of the second switch stage ( ), the output terminal of the second switch stage forming the signal output (O) of the control circuit, and the threshold value (U ) of the first switch stage being higher than the threshold value (U ) of the second switch stage.