# IEEE Transactions on Instrumentation and Measurement

## Filter Results

Displaying Results 1 - 25 of 95

Publication Year: 2009, Page(s):C1 - 747
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• ### IEEE Transactions on Instrumentation and Measurement publication information

Publication Year: 2009, Page(s): C2
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• ### Editorial Foreword

Publication Year: 2009, Page(s): 748
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• ### 2008 Conference on Precision Electromagnetic Measurements (CPEM)

Publication Year: 2009, Page(s):749 - 750
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• ### Calibration of Rogowski Coils at Power Frequencies Using Digital Sampling

Publication Year: 2009, Page(s):751 - 755
Cited by:  Papers (24)
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A new high-accuracy system for power-frequency calibration of Rogowski coils is described in this paper. The calibration system is based on nonsynchronous digital sampling. An automated prototype of the calibration system operates at currents of up to 2000 A. A semiautomated system is capable of operating at currents of up to 60 000 A. The best uncertainty (k = 2) of the calibration system ... View full abstract»

• ### Novel Digital Voltage Ramp Generator for Use in Precision Current Sources in the Picoampere Range

Publication Year: 2009, Page(s):756 - 760
Cited by:  Papers (8)
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We report on the development of a novel highly linear voltage ramp generator to be used for the traceable calibration of picoamperemeters. The generator is based on two digital-to-analog converters, one of them being used to compensate for the differential nonlinearity of the other one. The generator is completely controllable by a computer, its voltage slope dV/dt is adjustable betw... View full abstract»

• ### Systematic Error Analysis of Stepwise-Approximated AC Waveforms Generated by Programmable Josephson Voltage Standards

Publication Year: 2009, Page(s):761 - 767
Cited by:  Papers (57)
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We have measured stepwise-approximated sine waves generated by a programmable Josephson voltage standard (PJVS) 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 thermal voltage converters (TVCs). We present detailed explanations of the fundamental causes and consequence... View full abstract»

• ### Development and Application of a Programmable Partial Discharge Calibrator

Publication Year: 2009, Page(s):768 - 774
Cited by:  Papers (4)
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A programmable partial discharge (PD) calibrator composed of an arbitrary waveform generator that is series connected to a capacitor is described. The voltage waveform supplied by the generator is software controlled. The characteristics and capabilities of the calibrator are presented, and the procedures used for its characterization are discussed. The calibrator can reproduce different types of ... View full abstract»

• ### Operating Margins for a Pulse-Driven Josephson Arbitrary Waveform Synthesizer Using a Ternary Bit-Stream Generator

Publication Year: 2009, Page(s):775 - 780
Cited by:  Papers (22)
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We describe measurements with a pulse-driven Josephson arbitrary waveform synthesizer (JAWS) that uses a ternary arbitrary bit-stream generator as the bias source. This system is designed to be used as an AC Josephson voltage standard. From these measurements, we conclude that the system is operational for root-mean-square voltages of up to 220 mV. We measured the operating margins for different v... View full abstract»

• ### Simple Algorithm for Sampling Synchronization of ADCs

Publication Year: 2009, Page(s):781 - 785
Cited by:  Papers (14)
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This paper describes an algorithm for synchronizing analog-to-digital converters (ADCs) to the fundamental of a continuous periodic signal. It operates like a digital phase-locked loop, is based mainly on discrete Fourier transform (DFT) on sampled data, and uses DFT-leakage detection to ensure synchronous sampling. It may be applied to distorted waveforms in general, irrespective of the type of A... View full abstract»

• ### Design and Characterization of a Sampling System Based on $Sigma$–$Delta$ Analog-to-Digital Converters for Electrical Metrology

Publication Year: 2009, Page(s):786 - 790
Cited by:  Papers (10)
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This paper describes a sampling system designed using a commercial sigma-delta analog-to-digital converter (Sigma-Delta ADC). In addition to characterization measurements using a conventional high-quality signal generator, a Josephson waveform synthesizer that provides ultimately noise- and drift-free voltages was used. To evaluate the suitability of this sampling system as part of a transfer powe... View full abstract»

• ### Josephson-Voltage-Standard-Locked Sine Wave Synthesizer: Margin Evaluation and Stability

Publication Year: 2009, Page(s):791 - 796
Cited by:  Papers (35)
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This paper describes a Josephson-voltage-standard-locked synthesizer where a commercial digital-to-analog converter is used as a sine wave generator. The output amplitude of the generator is controlled by the calculable fundamental of the stepwise waveform generated by a SINIS Josephson junction array. Such a system combines the versatility of a commercial source with the stability and accuracy of... View full abstract»

• ### Development and Investigation of SNS Josephson Arrays for the Josephson Arbitrary Waveform Synthesizer

Publication Year: 2009, Page(s):797 - 802
Cited by:  Papers (17)
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Superconductor-normal metal-superconductor(SNS) Josephson junction series arrays are developed and investigated for applications in the Josephson arbitrary waveform synthesizer (JAWS). The series arrays contain up to about 10 000 junctions arranged in a meanderlike design. AC voltages and arbitrary waveforms are synthesized by operation of the Josephson junctions by short current pulses. Higher ha... View full abstract»

• ### Modeling and Measuring Error Contributions in Stepwise Synthesized Josephson Sine Waves

Publication Year: 2009, Page(s):803 - 808
Cited by:  Papers (35)
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Synthesizing Josephson stepwise approximated sine waves to produce an AC quantum standard is limited by errors in the waveform transitions between quantized voltages. Many parameters have an impact on the shape of the transients. A simple model with a single equivalent time constant can be used to evaluate the influence of these parameters. Measurements of the transients allow establishment of the... View full abstract»

• ### Precision Differential Sampling Measurements of Low-Frequency Synthesized Sine Waves With an AC Programmable Josephson Voltage Standard

Publication Year: 2009, Page(s):809 - 815
Cited by:  Papers (64)
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We have developed a precision technique to measure sine-wave sources with the use of a quantum-accurate AC programmable Josephson voltage standard. This paper describes a differential method that uses an integrating sampling voltmeter to precisely determine the amplitude and phase of high-purity and low-frequency (a few hundred hertz or less) sine-wave voltages. We have performed a variety of meas... View full abstract»

• ### First Direct Comparison of a Cryocooler-Based Josephson Voltage Standard System at 10 V

Publication Year: 2009, Page(s):816 - 820
Cited by:  Papers (11)
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A commercially available and fully automated 10-V Josephson voltage standard system with a liquid helium free cooling has been developed as a result of the cooperation between the Institute of Photonic Technology and Supracon AG, both in Jena, Germany. The system operates with an array of 19 700 superconductor-insulator-superconductor Josephson tunnel junctions installed in a pulse tube cooler. A ... View full abstract»

• ### A Two-Way Josephson Voltage Standard Comparison Between NIST and NRC

Publication Year: 2009, Page(s):821 - 826
Cited by:  Papers (11)
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A two-way Josephson voltage standard (JVS) direct comparison between the National Institute of Standards and Technology (NIST) and the National Research Council (NRC) has been conducted. The process consists of two comparisons: first, using the NRC JVS with the NRC's measuring system (hardware and software) to measure the 10 V provided by the NIST JVS and then using the NIST JVS measuring system t... View full abstract»

• ### Reconfigurable Unit for Precise RMS Measurements

Publication Year: 2009, Page(s):827 - 831
Cited by:  Papers (8)
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A system for the precise measurement of electrical quantities by means of the root-mean-square (RMS) value of ac voltages or currents is described. The system is based on a planar multijunction thermal converter (PMJTC) and low-cost electronic components. The miniboard circuitry can also be used in several experiments where flexibility is required. As a first application, the system can carry out ... View full abstract»

• ### Comparison of a Multichip 10-V Programmable Josephson Voltage Standard System With a Superconductor–Insulator–Superconductor-Based Conventional System

Publication Year: 2009, Page(s):832 - 837
Cited by:  Papers (15)
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We developed a 10-V dc programmable Josephson voltage standard (PJVS) using a multichip technique. The PJVS was based on NbN/TiNx/NbN junctions and operated using a 10-K compact cryocooler. We carried out an indirect comparison with a superconductor-insulator-superconductor-based conventional Josephson voltage standard (JVS) by measuring the voltage of a 10-V zener diode reference stand... View full abstract»

• ### Progress Toward a 1 V Pulse-Driven AC Josephson Voltage Standard

Publication Year: 2009, Page(s):838 - 843
Cited by:  Papers (40)
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We present a new record root mean square (rms) output voltage of 275 mV, which is a 25% improvement over the maximum that is achieved with previous AC Josephson voltage standard (ACJVS) circuits. We demonstrate the operating margins for these circuits and use them to measure the harmonic distortion of a commercial digitizer. Having exceeded the threshold of 125 mV rms for a single array of Josephs... View full abstract»

• ### Precision AC–DC Transfer Measurement System Based on a 1000-V Inductive Voltage Divider

Publication Year: 2009, Page(s):844 - 847
Cited by:  Papers (4)
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The traceability for thermal voltage converters (TVCs) usually depends on a range-to-range buildup technique that requires either very small voltage-level dependencies of the converters or precise knowledge of these level dependencies. In practice, this inevitably leads to uncertainties that accumulate in the buildup process and dominate the overall uncertainty of the high-voltage ac-dc transfer m... View full abstract»

• ### Single-Junction Thermal Voltage Converters With Reduced Uncertainties at Frequencies up to 1 MHz

Publication Year: 2009, Page(s):848 - 852
Cited by:  Papers (4)
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This paper presents a new realization of standards for ac-dc difference at voltages ranging from 1 to 4 V and frequencies of up to 1 MHz. This work has mainly been focused on improving the determination of the components of ac-dc difference that most significantly contributed to the uncertainty of the previous realization. These components are the ac-dc difference due to skin effect, transmission ... View full abstract»

• ### Correction of Systematic Errors Due to the Voltage Leads in an AC Josephson Voltage Standard

Publication Year: 2009, Page(s):853 - 858
Cited by:  Papers (16)
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The National Institute of Standards and Technology (NIST) has recently reported the first application of a quantum ac Josephson voltage standard for the calibration of thermal transfer standards in the 1- to 10-kHz frequency range. This paper describes preliminary work on extending its frequency calibration range up to 100 kHz by correcting the systematic errors due to voltage leads. A ground loop... View full abstract»

• ### Improved High-Input-Impedance mV-Amplifiers With Gain Factors From 10 to 900

Publication Year: 2009, Page(s):859 - 862
Cited by:  Papers (6)
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New millivolt-amplifiers (mV-amplifiers) driving planar multijunction thermal converters (PMJTCs) at their output have been developed to measure the output voltage of micropotentiometers (mupots). Using a twin-stage design with gains of 10, 20, and 30 per stage, total gain factors ranging from 10 to 900 are achieved. This results in a usable range of input voltages from 100 muV up to 100 mV at fre... View full abstract»

• ### Direct Measurement of AC Current by Measuring the Voltage Drop on the Coaxial Current Shunt

Publication Year: 2009, Page(s):863 - 867
Cited by:  Papers (13)
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An accurate direct measurement of ac current that avoids complex and time-consuming ac-dc current transfer measurements by directly measuring the ac voltage drop of coaxial current shunts is described. Evaluation of custom-developed coaxial current shunts for long-term drift, self-heating effects, and loading using a commercial ac voltmeter is presented. By correcting only the shunts' long-term dr... View full abstract»

## Aims & Scope

Papers are sought that address innovative solutions to the development and use of electrical and electronic instruments and equipment to measure, monitor and/or record physical phenomena for the purpose of advancing measurement science, methods, functionality and applications.

Full Aims & Scope

Editor-in-Chief