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In this paper we demonstrate that if N (N>2) voltage amplifiers are connected to the device under test when performing voltage noise measurements in a situation in which the equivalent voltage noise of each single amplifier is larger than that to be measured, the time required for obtaining a given accuracy is reduced by a factor N(N−1)/2 with respect to the conventional set-up employing just two...
Johnson noise thermometry is a well established technique that allows the determination of the temperature starting from the measurement of the thermal noise produced by a known resistance at thermal equilibrium. Notwithstanding that, under proper conditions, the Johnson noise thermometer is a primary thermometer, the very long measurement time that is required to reach accuracies in the order of...
In this paper we demonstrate how it is possible to exploit cross-correlation techniques in order to estimate a DUT impedance or admittance by means of noise measurements. The potential advantages of such an approach over conventional RLC meters are the absence of any external excitation source and that the entire impedance vs frequency plot can be obtained in almost real time with the measurement...
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