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In 2010, NIST measured the Boltzmann constant k with an electronic technique that measured the Johnson noise of a 100 Ω resistor at the triple point of water (TPW) and used a voltage waveform synthesized with a quantized voltage noise source (QVNS) as a reference. In this paper, we present measurements of k using a 200 Ω sense resistor and appropriately modified QVNS circuit and waveform. Preliminary...
A micro-Pirani pressure sensor, which consists of a pressure dependent thermo-resistance gauge, is traditionally exploited using a steady state resistance measurement. Any signal variation occurs over a constant voltage bias due to the initial resistance of the device which affects the sensor's sensitivity. Our work shows for the first time an experimental investigation of a micro-Pirani gauge based...
Integrated grounded resistors of very large value are essential circuit elements for the design of compact filters with very low cut-off frequencies. A typical application is the rejection of DC voltages in amplifier circuits in physiological recording systems exhibiting electrode offset and low-frequency drift. This paper describes the implementation of a giga-ohm resistance using a fixed-gain OTA...
We have studied the interface resistance between the polymer based conducting and resistive thick film layers. The samples were made using different resistive pastes and dipping silvers. The composite of carbon and graphite (C/Gr) conducting particles suspended in different polymer vehicles were used for the thick film resistive layers preparation. Interface resistance RI created between the contact...
The long term stability of polymer based thick film resistors was correlated with the results of standard testing methods: the low frequency noise measurements, non-linearity and new proposed method: Electro-Ultrasonic Spectroscopy. The samples were made using different resistive and conducting pastes. The resistive pastes were made using one type of conducting grains - carbon and graphite particles,...
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