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:
May. 24, 2005
Filed:
Aug. 15, 2002
Ralf Koernle, Zell a.H., DE;
Albert Woehrle, Aichhalden/Rotenbach, DE;
Juergen Motzer, Gengenbach, DE;
Ralf Koernle, Zell a.H., DE;
Albert Woehrle, Aichhalden/Rotenbach, DE;
Juergen Motzer, Gengenbach, DE;
VEGA Grieshaber KG, Wolfach, DE;
Abstract
A two-wire sensor () is attached to one pole of a voltage distribution source (U) by an initial connecting line (V) in which a current-limiting resistor (R) is positioned and is attached to the other pole by a second connecting line (V). Parallel to the series connection consisting of the two-wire sensor (S) and the current-limiting resistor (R) is at least one limiting diode (D). A current regulator (SR) which is attached to the poles of the power source (U) regulates a parallel current (I) which runs parallel to the current through the two-wire sensor (D), so that there is a sum current at the poles of the power source (U) that always corresponds to the measured value delivered by the two-wire sensor (S). The regulating inputs of the current regulator (SR) are connected to the terminals of a current-sensing resistor (R) positioned in a connecting line (V). When a HART®-interface is used with the two-wire sensor (S) a HART®-resistor (RH) is positioned in one of the two connecting lines (V).