Bridge Amplifier Linearity Investigation with a Cascaded Inductive Voltage Divider Setup
M. Florian Beug, Harald Moser, A. Kölling · Journal of Physics Conference Series · 2018
We present the linearity investigation of high precision bridge amplifiers as used in static force and torque measurements. The setup with cascaded inductive voltage dividers allows a much more detailed bridge amplifier linearity analysis than it is possible with the BN100 bridge standard or a recently proposed resistor-based strain gauge bridge transducer simulator. The bridge amplifier linearity deviation can be determined with an expanded (k=2) uncertainty of 2 nV/V and only with the presented setup it is possible to potentially reduce the relative uncertainty for nominal ratios below 1 mV/V.