Title :
Modified Maxwell-Wien bridge with auto source balance
Author :
Cheng, Ding ; Wenjun, Lu
Author_Institution :
Nat. Inst. of Metrol., Beijing, China
Abstract :
This paper describes the realization of auto source balance in a modified Maxwell-Wien bridge by using a differential amplifier. The method of eliminating the oscillation of this differential amplifier is also discussed. The inductance measurement error introduced by the adoption of differential amplifier and related compensation circuit has also been analyzed in details. In the range of 100 muH~100 H, the inductance measurement error caused by the amplifier is less than 2 ppm under 1 kHz .
Keywords :
bridge circuits; differential amplifiers; inductance measurement; measurement errors; auto source balance; compensation circuit; differential amplifier; frequency 1 kHz; inductance measurement error; modified Maxwell-Wien bridge; Bridge circuits; Capacitance; Capacitors; Differential amplifiers; Earth; Inductance measurement; Maxwell equations; Metrology; Satellite ground stations; Time measurement;
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.2008.4574906
