CIRCUIT FOR MEASURING A RESISTANCE

CIRCUIT FOR MEASURING A RESISTANCE

A circuit for measuring an unknown resistance of a resistive element comprises a sensor circuit to generate a differential voltage dependent on the resistance of the resistive element (VBE1, VBE2) and a reference circuit to generate a differential reference voltage (VBE3, VBE4) and a sigma-delta con...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Maccioni, Alberto, Schipani, Monica, Pasetti, Giuseppe
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Beschreibung
Zusammenfassung:A circuit for measuring an unknown resistance of a resistive element comprises a sensor circuit to generate a differential voltage dependent on the resistance of the resistive element (VBE1, VBE2) and a reference circuit to generate a differential reference voltage (VBE3, VBE4) and a sigma-delta converter comprising a first stage (400), wherein a first capacitor (C2P) is selectively coupled to one of the output terminals of the sensor circuit and a second capacitor (C1P) is coupled to one of the output terminals of the reference circuit. The circuit generates logarithmically compressed values.