Dual sensor for detecting oxidising and reducing harmful gases near motor vehicles

The sensor comprises two sensor elements (S1,S2). The signals are tapped at each of the two voltage dividers (TP1,TP2), and supplied as voltages to the input of analogue control stages (R1,R2), assigned directly to the associated sensor elements across a decoupling stage formed by an impedance conve...

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Bibliographic Details
Main Authors NIEDING, KLAUS, BENDICKS, NORBERT, WEBER, THOMAS, KATHOL, MEINOLF, 57413 FINNENTROP, DE, HASSELMANN, HOLGER, 45279 ESSEN, DE
Format Patent
LanguageEnglish
German
Published 07.08.1997
Edition6
Subjects
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Summary:The sensor comprises two sensor elements (S1,S2). The signals are tapped at each of the two voltage dividers (TP1,TP2), and supplied as voltages to the input of analogue control stages (R1,R2), assigned directly to the associated sensor elements across a decoupling stage formed by an impedance converter (IPW1,IPW2). The other inputs are connected to a common reference voltage source (Q1) serving to provide a desired voltage value. The outputs of the two regulating stages communicate with a variable on-chip resistance (RR1,RR2). By this means the other branch of one of the two voltage dividers is formed.
Bibliography:Application Number: DE1996103395