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:
Oct. 31, 2000
Filed:
Jun. 03, 1998
Peter Klofer, Steinen, DE;
Jurgen Kruger, Lorrach, DE;
Endress D+ Hauser GmbH + Co., Maulburg, DE;
Abstract
In an assembly for signal transmission between a transmitter location and a receiver location connected to each other by a two-wire conductor an analog signal current, variable between two limit values, flows via this two-wire conductor. This signal current represents a measured variable sensed by a sensor in the transmitter location and forms the supply current necessary for operating the transmitter location. The transmitter location comprises a circuit generating a constant operating voltage for the transmitter location. Also provided in the transmitter location is a controllable current source being provided, determining the current flowing via the two-wire conductor as a function of the measured variable. The circuit generating the operating voltage for the transmitter location is a switching regulator and in the transmitter location a controllable voltage regulator is provided, the output voltage of which changes in the opposite sense of the signal current and forms the input voltage of the switching regulator.