Title :
A precise two-channel digitally synthesized AC voltage source for impedance metrology
Author :
Nissila, J. ; Ojasalo, Kari ; Kampik, Marian ; Kaasalainen, J. ; Maisi, V. ; Casserly, M. ; Overney, Frederic ; Christensen, A. ; Callegaro, Luca ; D´Elia, Vincenzo ; Tran, N.T.M. ; Pourdanesh, Faranak ; Ortolano, Massimo ; Kim, D.B. ; Penttila, J. ; Rosc
Author_Institution :
Centre for Metrol. & Accreditation (MIKES), Espoo, Finland
Abstract :
A two-channel AC voltage source based on digital synthesis is reported. We present measurement results of some of the key properties at 1 kHz with applications like digital impedance bridges in mind. Measurements show that amplitude ratio of the channels has a stability (Allan standard deviation) of one part in 108 for a 30 min measurement. The phase difference between the channels is also stable within 0.1 μrad.
Keywords :
electric impedance measurement; stability; Allan standard deviation; digital impedance bridge; frequency 1 kHz; impedance metrology; stability; time 30 min; two-channel digitally synthesized AC voltage source; Bridge circuits; Circuit stability; Harmonic analysis; Impedance; Metrology; Optical buffering; Optical filters; Digital signal source; digital-to-analog converter; impedance bridge;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4799-5205-2
DOI :
10.1109/CPEM.2014.6898612
