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:
Jan. 09, 1990
Filed:
Nov. 20, 1987
Thomas Blumel, Schmitten, DE;
VDO Adolf Schindling AG, Frankfurt am Main, DE;
Abstract
In a monitoring system for a bridge output stage which is connected in series with a controllable source of current, to the terminals of a source of operating voltage, the voltage over the bridge output stage and the voltage drop over a current-measurement resistor are fed to a subtraction circuit. The subtraction circuit is connected, via an analog-to-digital converter, to an input of a microcomputer, and a program is provided by which it is tested whether the voltage at the input of the microcomputer lies within a predetermined range. The operating voltage and the voltage over the controllable source of current are preferably fed to a further subtraction circuit the output of which is connected to an output of the subtraction circuit.