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. 25, 2025
Filed:
Dec. 02, 2022
Endress+hauser Flowtec Ag, Reinach, CH;
Pascal Buchschacher, Döttingen, CH;
Alex Huber, Bülach, CH;
Hanspeter Schmid, Küttigen, CH;
Werner Tanner, Lausen, CH;
Endress+Hauser Flowtec AG, Reinach, CH;
Abstract
The signal transmission system comprises a transmitter circuit, a receiver circuit and a signal cable. A current divider is formed by a terminating resistor between the signal conductors of the signal cable. The transmitter circuit drives a loop current. When the receiver circuit input voltage has a voltage level above a first switching voltage threshold value, the output voltage assumes a first voltage level. The output voltage maintains the first voltage level when the input voltage is below the first switching voltage threshold value but above a second switching voltage threshold value. The transmitter circuit is configured to modulate the loop current with at least two different non-zero magnitudes at successive times. The first magnitude is greater than a first switching current threshold value and the second magnitude is less than the first switching current threshold value and greater than a second switching current threshold value.