Title :
Characterization of High-Accuracy, Wideband Transconductance Amplifiers up to 100 kHz
Author :
Kon, S. ; Yamada, Tomoaki
Author_Institution :
Nat. Metrol. Inst. of Japan, Nat. Inst. of Adv. Ind. Sci. & Technol., Tsukuba, Japan
Abstract :
A highly precise and accurate system comprising several ac shunts and an inductive voltage divider (IVD) is proposed for characterizing high-accuracy, wideband transconductance amplifiers (TCAs). Frequency characterization of the shunts and the IVD confirms the wideband (up to 100 kHz) performance of the proposed system. Evaluation of two TCAs up to 100 kHz with the proposed system reveals frequency-, current-, and load-dependent properties as well as phase shifts between the input voltage and the output current. The results for the load dependence show that the load differences have a limited impact on the phase shifts up to 10 kHz.
Keywords :
phase shifters; voltage dividers; wideband amplifiers; AC shunts; IVD; TCA; current-dependent properties; frequency characterization; frequency-dependent properties; inductive voltage divider; input voltage; load-dependent properties; output current; phase shifts; wideband transconductance amplifiers; Calibration; Current measurement; Frequency measurement; Standards; Transconductance; Voltage measurement; Wideband; AC current; amplifier; inductive voltage divider (IVD); shunt; transconductance; transconductance.;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2014.2303554
