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A system designed for precision measurement of ac-dc difference of thermal voltage converters in terms of a programmable Josephson voltage standard is under development at the National Measurement Institute, Australia, in collaboration with the National Institute of Advanced Industrial Science and Technology, Japan. The agreement between the new system and calculable thermal converters is presently...
This paper describes the framework of a calibration-free arbitrary power calibrator and an ac calibration unit which is one of components in the calibrator. The calibration unit has been developed and the measurement results are presented for verification of the performance.
To realize battery-free operation employing energy harvesting, a step-down switched-capacitor-based converter has been used as a vibration-to-electricity converter. In this paper, to improve power efficiency, a step-down ACDC converter realizing 1/N (N=2,3,... ) conversion modes is designed by using switched-capacitor techniques. Although conventional converters offer an output by regulating the stored...
A compact ac-dc transfer standard system has been developed at AIST. The system is able to perform both ac-dc difference measurements and fast-reversed dc (FRDC) measurements, at voltages from 1V to 10 V. A remote-calibration capability is realized using a digital-output thermal converter as a travelling standard. The system has the capability of calibrating ac-dc transfer instruments with an uncertainty...
For wide spread distribution of multijunction thermal converters (MJTCs), thin film MJTCs with a novel structure have been developed. In order to reduce the effect of thermal ripples to the output voltage for MJTCs, the authors introduced an AlN chip under a Cu electrode on which Bi/Sb thermocouples are integrated. The thermoelectric transfer difference of the new MJTCs was evaluated to be less than...
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