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Updated: Feb 23, 2026

Thermal Measurement Techniques in Analytical Microfluidic Devices
Published on: June 3, 2015
Temperature-stabilized differential amplifier for low-noise DC measurements
1Solid State Physics Laboratory, ETH Zürich, Otto-Stern-Weg 1, 8093 Zürich, Switzerland.
Abstract:
A tabletop low-noise differential amplifier with a bandwidth of 100 kHz is presented. Low voltage drifts of the order of 100 nV/day are reached by thermally stabilizing relevant amplifier components. The input leakage current is below 100 fA. Input-stage errors are reduced by extensive circuitry. Voltage noise, current noise, input capacitance, and input current are extraordinarily low. The input resistance is larger than 1 TΩ. The amplifiers were tested with and deployed for electrical transport measurements of quantum devices at cryogenic temperatures.
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