Title :
Digital Q measurement of audio-frequency inductors
Author :
Viswanathan, T.R. ; Faruque, S.M. ; Vlach, J.
Author_Institution :
Carnegie-Mellon Univ., Pittsburgh, PA, USA
Abstract :
A measurement technique is presented that is based on the idea of realizing a negative conductance which is variable under the control of a frequency and which uses a switched capacitor in conjunction with a unity gain voltage buffer. Experimental results confirm the utility of the approach. The technique can be extended to other frequency ranges with the use of high-speed gallium arsenide MESFET switches and a wide-band unity gain buffer.
Keywords :
Q-factor measurement; buffer circuits; digital instrumentation; inductors; semiconductor switches; switched capacitor networks; Q-factor measurement; audio-frequency inductors; digital instrumentation; high-speed gallium arsenide MESFET switches; switched capacitor; unity gain voltage buffer; voltage controlled negative conductance; Capacitors; Clocks; Detectors; Oscillators; Permittivity; Resonant frequency; Switches;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.1981.6312416
