IEEE Transactions on Instrumentation and Measurement

Volume 22 Issue 3 • Sept. 1973

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Displaying Results 1 - 23 of 23
  • Table of contents

    Publication Year: 1973, Page(s): c1
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  • IEEE Instrumentation and Measurement Group

    Publication Year: 1973, Page(s): c2
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  • Logarithmic Analog-to-Digital Converters: A Survey

    Publication Year: 1973, Page(s):201 - 213
    Cited by:  Papers (13)  |  Patents (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2236 KB)

    Analog-to-digital converters (ADC) with logarithmic law are receiving particular attention from system and circuit designers. They can be applied to solve many problems of data acquisition and encoding found in almost all the fields of experimental physics and instrumentation dealing with analog variables with several decades of dynamic range, where a constarnt relative accuracy, rather than a con... View full abstract»

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  • New Criterion for Testing Analog-to-Digital Converters for Statistical Evaluation

    Publication Year: 1973, Page(s):214 - 217
    Cited by:  Papers (4)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (761 KB)

    The influence of linearity errors on the statistical properties of analog-to-digital converter (ADC) outputs is discussed. It is shown that most ADCs available on the market cannot be used for precise statistical measurements. A measurement technique and an error definition is proposed to allow a careful evaluation of ADCs for statistical measurements. View full abstract»

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  • Square-Root Extractor for Fluid Speed Measurements

    Publication Year: 1973, Page(s):218 - 221
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (681 KB)

    A fluid speed measuring system based on Bernoulii's equation of flowing fluid is presented. The necessary square-root extraction is performed numerically to reach the advantages of numerical display and the possibility of using the device as a data source of the computer controlling the process. Simple recursive square-root extraction algorithm is derived and the statistics of the roundoff error i... View full abstract»

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  • An Exponential Current Generator

    Publication Year: 1973, Page(s):222 - 225
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (701 KB)

    A current getlerator has been constructed from two operational amplifiers and a thermostated twin transistor. The current is an exponential function (5) of a controlling voltage. At currents greater than 100 μA, the transistor exhibited a resistive effect, for which it was possible to compensate for internally. The generator was tested over the current range 30 nA-15 mA and was found to pe... View full abstract»

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  • A New Technique for Designing High-Speed Frequency Counters

    Publication Year: 1973, Page(s):226 - 230
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (913 KB)

    Some basic difficulties in the implementation of high-speed frequency counters are discussed. A new method which avoids most of these difficulties is described. The method essentially consists of binary prescaling the input frequency to a value easily manageable with decade counters and subsequently multiplying the resultant count in the decade counters by the prescaling factor. A simple digit ser... View full abstract»

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  • Ferroelectric Switching Time Measurements

    Publication Year: 1973, Page(s):231 - 234
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (942 KB)

    A simple method is described for determining field-induced polarization reversal times in ferroelectrics ranging from seconds to nanoseconds without the use of an oscilloscope. The procedure consists of 1) setting some selected reference state of polarization, preferably by recording a hysteresis loop which is terminated at the reference state, 2) applying a pulse field of known amplitude and dura... View full abstract»

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  • Internal Comparison of a Large Group of Standard Cells

    Publication Year: 1973, Page(s):234 - 239
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1040 KB)

    Equipment is described for comparing any number N of standard cells which constitute a standard of electromotive force. The scheme is economical, needing only 2N measurements. The cells are disposed in a ring, and there is simple switching to compare each cell with its four neighbors. The calculations are done by a program on a desk calculator. They give the value of each cell with respect to the ... View full abstract»

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  • On the Effect of Linear Systems on Transients

    Publication Year: 1973, Page(s):240 - 245
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (986 KB)

    The effect of linear systems on transients is analyzed and parameters are introduced which allow one to estimate the error introduced by a system in the reproduction of a signal. Methods of calculating and measuring these parameters are given. View full abstract»

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  • Noise Loading Analysis of a Memoryless Nonlinearity Characterized by a Taylor Series of Finite Order

    Publication Year: 1973, Page(s):246 - 249
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (581 KB)

    Noise loading analysis of a mhemoryless nonlinearity characterized by a Taylor series of finite order is presented in terms of the autocorrelation function of the input signal. For narrow-band application, an explicit expression for the noise power ratio at the output of the nonlinearity is given up to seventh-order characteristic. The corresponding 3-tone intermodulation distortion of type ... View full abstract»

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  • Short-Term Frequency Stability of the Rb87 Maser

    Publication Year: 1973, Page(s):250 - 257
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1402 KB)

    Measurements of the short-term stability of the Rb87 maser are reported here. The measurements were made as a function of the maser power output and of the receiver cutoff frequency. The experimental data are compared to theoretical results obtained from an approximate theory. In this theory the transfer function of the maser for thermal noise is derived, and the spectral density of the phase fluc... View full abstract»

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  • Energy Bounds for Time-Domain Reflectometry

    Publication Year: 1973, Page(s):258 - 261
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (780 KB)

    Bounds for the minimum energy reflected from certain reactive discontinuities, when excited by time-limited signals, are considered. The implications for the use of time domain reflectometers in detecting small discontinuities are considered. View full abstract»

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  • Practical Analysis of Reflectometers and Power Equation Concepts

    Publication Year: 1973, Page(s):261 - 267
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1333 KB)

    The theory of power equations [1], [2] introduced a concept whereby the basic parameter is the net power in the waveguide of interest. Power equations are based on the "terminal invariant" parameters: available power, maximum efficiency, and "mismatch factors." The purpose of this paper is to examine the various systems which can be used to satisfy the power equation concept in the transfer of the... View full abstract»

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  • The Reduction of Errors in a Precise Microwave Attenuator Calibration System

    Publication Year: 1973, Page(s):268 - 270
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (582 KB)

    Refinements have been made to the parallel-substitution heterodyne method of attenuation measurement. These are provision for small fixed frequency differences between the IF signals to improve the sensitivity of tests for leakage, a switched reference path to reduce errors from drift and to assess "flange scatter," a flexible waveguide in the measuring path to accommodate attenuators of different... View full abstract»

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  • Computer-Aided Design of a Data-Acquisition System for Intense Electromagnetic Environments

    Publication Year: 1973, Page(s):271 - 273
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (499 KB)

    An application of the NET-2 network-analysis computer program to the design of a data-acquisition system is described. A successful attempt is made to reduce the system's susceptibility to a cable-excited electromagnetic impulse through semiautomated design of a bandpass filter. Useful attributes of computer programs for such an application are discussed. View full abstract»

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  • Mismatch Considerations in Evaluating Amplifier Noise Performance

    Publication Year: 1973, Page(s):274 - 278
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1017 KB)

    In terms of a total system evaluation, the potential mismatch errors in the evaluation of noise figure or effective input noise temperature are of greater magnitude than is the case in power measurement. In spite of this, this topic has found only limited coverage in the literature. Moreover, the existing treatments are in terms of parameters whose evaluation requires a significant effort. This pa... View full abstract»

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  • Precision Digital Tachometer

    Publication Year: 1973, Page(s):278 - 279
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (447 KB)

    An entirely digital method of measuring angular speed, acceleration, and torque during transient characteristics is described. Diffraction gratings are used in an optical transducer, which is interfaced to a digital computer to process the data obtained and to provide a plot of the transient characteristics as functions of time. View full abstract»

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  • A Total Power Filter Spectrometer for Radio Astronomy

    Publication Year: 1973, Page(s):279 - 281
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (635 KB)

    A system is described which employs two decade sets of local oscillators to separate signal power into a bank of 100 identical filters. By commutating the local oscillators, filter instabilities are removed from the resulting output and local oscillator stability is the remaining factor. Practical limits on this are discussed in relation to the total output uncertainty of the spectrometer. View full abstract»

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  • Contributors

    Publication Year: 1973, Page(s):282 - 284
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  • Calendar of Events

    Publication Year: 1973, Page(s): 284a
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  • [Advertisement]

    Publication Year: 1973, Page(s):284b - 284e
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  • IEEE Instrumentation and Measurement Group

    Publication Year: 1973, Page(s): 284d
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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

Meet Our Editors

Editor-in-Chief

SHERVIN SHIRMOHAMMADI
School of EECS
University of Ottawa
800 King Edward Ave.
Ottawa, Ontario
K1N 6N5 CANADA
Fax: 613-562-5664
shervin@discover.uottawa.ca