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:
Dec. 14, 2021
Filed:
Sep. 06, 2017
Ams International Ag, Rapperswil, CH;
Rohit Ranganathan, Telangana, IN;
Sanjeev Praphulla Chandra Nyshadham, Pithapuram, IN;
Krishna Kanth Avalur, Hyderabad, IN;
Ravi Kumar Adusumalli, Telangana, IN;
Prasad Ponnada, Andhrapradesh, IN;
AMS INTERNATIONAL AG, Rapperswil, CH;
Abstract
A measurement circuitry (MC) for evaluating a resistance of a resistive gas sensor (GS) comprises a first current path (P), wherein a first logarithmic compression circuit (LC) is arranged in the first current path (P). A reference resistor (Rreference) and a second logarithmic compression circuit (LC) is arranged in a second current path (P) of the measurement circuitry (MC). A voltage generator (VG) provides a fixed voltage excitation for the resistive gas sensor (GS) and the reference resistor (Rreference). A first current (I) received from the resistive gas sensor (GS) flows from the gas sensor (GS) via the first current path (P) into the first logarithmic compression circuit (LC). An evaluation circuit (EC) determines the resistance (Rs) of the resistive gas sensor (GS) in dependence on a first and second output signal (Ve, Ve) of the first and the second logarithmic compression circuit (LC, LC).