45 citations · 45 across the 5 of their papers we have counts for
5 papers
A three-arm current comparator bridge, for impedance comparisons over the complex plane
Luca Callegaro, Vincenzo D'Elia, Massimo Ortolano +1
We present here the concept of three-arm current comparator impedance bridge, which allows comparisons among three unlike impedances. Its purpose is the calibration of impedances h…
Experiences with a two terminal-pair digital impedance bridge
Luca Callegaro, Vincenzo D'Elia, Marian Kampik +3
This paper describes the realization of a two terminal-pair digital impedance bridge and the test measurements performed with it. The bridge, with a very simple architecture, is ba…
Generation of reference dc currents at 1 nA level with the capacitance-charging method
Luca Callegaro, Pier Paolo Capra, Vincenzo D'Elia +1
The capacitance-charging method is a well-established and handy technique for the generation of dc current in the 100 pA range or lower. The method involves a capacitance standard…
Realization of the farad from the dc quantum Hall effect with digitally-assisted impedance bridges
Luca Callegaro, Vincenzo D'Elia, Bruno Trinchera
A new traceability chain for the derivation of the farad from dc quantum Hall effect has been implemented at INRIM. Main components of the chain are two new coaxial transformer bri…
An absolute Johnson noise thermometer
Luca Callegaro, Vincenzo D'Elia, Marco Pisani +1
We developed an absolute Johnson noise thermometer (JNT), an instrument to measure the thermodynamic temperature of a sensing resistor, with traceability to voltage, resistance and…