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:
Jul. 23, 1996
Filed:
Dec. 05, 1994
Hermann Vetter, Hessigheim, DE;
Hubert Schweiggart, Stuttgart, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
A method of determining a measurement value (U.sub.-- M) utilizes a calibrating operation and a measuring operation together with an operational amplifier (OP) having an output voltage (U.sub.-- A). The measurement value (U.sub.-- M) represents a current (I) flowing through a load (L) in a motor vehicle having a battery. The battery has a terminal of high potential and a terminal of low potential with the difference between the potentials being the battery voltage (U.sub.-- BATT). The load (L) is connected into a load current circuit and a measuring resistor (R.sub.-- M) also is connected into the load current circuit conducting a load current (I) which, in turn, causes a voltage (R.sub.-- M.cndot.I) to drop across the measuring resistor (R.sub.-- M). The method includes the steps of: amplifying the voltage R.sub.-- M.cndot.I across the measuring resistor (R.sub.-- M) utilizing the operational amplifier (OP); performing the calibrating operation with a sequence of substeps; and, performing the measuring operation with a further sequence of substeps to obtain the measurement value (U.sub.-- M). In this way, the previously required balancing of resistors in the calibrating operation can be omitted.