Title :
Determination of the farad from dc quantum hall effect, by using digital ac bridges
Author :
Trinchera, B. ; Elia, V.D. ; Callegaro, L.
Author_Institution :
Ist. Naz. di Ricerca Metrologica (INRIM), Torino
Abstract :
A new traceability chain for the derivation of the farad from dc quantum Hall effect is under characterization at INRIM. Main steps are performed by new ratio and quadrature coaxial ac bridges. The bridges are based on a polyphase digital synthesizer and do not employ variable dividers or impedances to achieve equilibrium. Preliminary measurements show an agreement, between the new farad determination and the maintained unit, better than 2 times 10-7.
Keywords :
capacitance measurement; digital circuits; dividing circuits; electric impedance; quantum Hall effect; dc quantum Hall effect; polyphase digital synthesizer; quadrature coaxial ac bridges; variable dividers; variable impedances; Bridge circuits; Calibration; Capacitors; Coaxial components; Electrical resistance measurement; Frequency; Hall effect; Impedance measurement; Quantum capacitance; Synthesizers;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2008. CPEM 2008. Conference on
Conference_Location :
Broomfield, CO
Print_ISBN :
978-1-4244-2399-6
Electronic_ISBN :
978-1-4244-2400-9
DOI :
10.1109/CPEM.2008.4574680
