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:
Nov. 26, 2013
Filed:
Jul. 05, 2010
Reinhard Bachmann, Lingenfeld, DE;
Eric Chemisky, Soultz sous forets, FR;
Michael Geppert, Ottersweier, DE;
Simon Rohrbach, Greenville, SC (US);
Ralf Walter, Waghäusel, DE;
Reinhard Bachmann, Lingenfeld, DE;
Eric Chemisky, Soultz sous forets, FR;
Michael Geppert, Ottersweier, DE;
Simon Rohrbach, Greenville, SC (US);
Ralf Walter, Waghäusel, DE;
Siemens Aktiengesellschaft, Munich, DE;
Abstract
A field device for process instrumentation having an interface for connecting a two-wire cable and for outputting measurement values, wherein the interface comprises a series circuit having a transistor circuit by which the loop current is adjustable as a function of a control signal, a power supply, and a device by which the loop current can be captured as an actual value that is fed by a first feedback coupling to a regulator having integrated behavior. The regulator compares the actual value to a target value, and generates a control signal for the transistor circuit. The actual value is fed by a second feedback coupling to a summation point as a compensation signal for generating an input signal for the transistor circuit as a function of the control signal and the compensation signal to suppress interference coupled into the two-conductor line.