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The impedance characteristics of resistance, capacitance and inductance can be simulated to calibrate Impedance Bridge by means of setting the amplitude ratio of voltage to current. In this paper we analyze the principles of voltage controlled and current controlled simulation impedance. The experiment and data are given. We propose the new concept of Digital Simulation Impedance (DSI) which is simulated...
A description of the interference immunity testing of electrical products is given and the need for traceable calibration of the associated testing generators is described. A brief presentation of three analysis algorithms to calibrate testing generators is given.
A waveform synthesizer adopting a programmable Josephson voltage standard has been developed, which can produce stepwise sinusoidal waveforms with few hundred quantum voltage levels. For synthesis of waveforms, individual cells on the Josephson array chip were promptly biased using a 7-channel current source with 14-bit resolution. As an application, the synthesizer was utilized as a fast-reversed...
A programmable partial discharge calibrator is described, which is constituted by an arbitrary waveform generator series connected to a capacitor. The step voltage waveform supplied by the generator is software controlled. The characteristics and the capabilities of the calibrator are presented and the procedures adopted for its characterization are reported. Using the calibrator, the performances...
AC voltages and arbitrary waveforms are synthesized by Josephson junctions operated by short current pulses. Series arrays of intrinsically shunted SNS Josephson junctions were developed and investigated for applications in this Josephson Arbitrary Waveform Synthesizer (JAWS). Amplitudes above 200 mV were generated by series arrays consisting of more than 10,000 junctions arranged in a meander-like...
This paper describes a Josephson voltage standard locked synthesizer where a commercial digital to analog converter is used as a sine wave generator whose output is controlled (in phase and amplitude) by the calculable fundamental of the stepwise sinuisoidal wave generated by a SINIS array. Such a system combines the versatility of a commercial source with the stability and accuracy of the Josephson...
We describe a method for generating a low frequency sinusoidal calibration voltage with reference to a quantum standard, at the point of connection to the instrument under test (DUT). The voltage is made traceable to the maintained SI unit by a sampling system that compares the applied potential difference to that developed by an array of Josephson junctions. A feedback loop allows the use of a silicon...
We have measured stepwise-approximated sinewaves generated by a programmable Josephson voltage standard with several different output configurations. These data are analyzed to characterize the dominant error mechanisms for rms applications, such as ac-dc difference measurements of a thermal voltage converter (TVC). We discuss the impact of the dominant systematic errors on the overall uncertainty...
A square-wave based AC Josephson apparatus is under development at MIKES. A new high-resolution custom made sine wave source has been developed and is being tested. A simple scheme for calibration of thermal converters (TC) with an AC Josephson system is suggested.
We describe measurements with a pulse-driven AC Josephson voltage standard (ACJVS) that uses a ternary arbitrary bitstream generator as the bias source. From these measurements we conclude that the circuit is operational for voltages up to 220 mV rms. We present a measured spectrum and operating margins for different voltages.
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