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IEEE Transactions on Instrumentation and Measurement

Issue 2 • June 1969

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Displaying Results 1 - 20 of 20
  • [Front cover]

    Publication Year: 1969, Page(s): c1
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  • IEEE Instrumentation and Measurement Group

    Publication Year: 1969, Page(s): c2
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  • Table of contents

    Publication Year: 1969, Page(s): 69
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  • Piezoelectric Gauge for Measurement of Pin and Socket Connector Contact Forces

    Publication Year: 1969, Page(s):70 - 72
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (695 KB)

    The need for a convenient means of measurement of the actual contact force for a pin and socket connector is outlined and the design of a piezoelectric strain gauge suitable for use with in-line connectors is described. PZT is used for the strain sensitive element of the gauge, and the relatively large electric charges produced by small strains permit the use of a very simple electrical circuit. W... View full abstract»

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  • Impedance Bridge Balancing Using Perturbation Theory

    Publication Year: 1969, Page(s):72 - 81
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1555 KB)

    This paper describes a technique for separating the two signal voltages necessary for balancing an ac impedance bridge from its detector output voltage. The technique is unique in that the necessary information is derived from modulations on the generator voltage. These modulations are formed by perturbing the variable arms at a fixed frequency but phased 90° apart. The two signals are then separ... View full abstract»

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  • Essential Nonlinearity of Phase-Sensitive Detector Characteristics

    Publication Year: 1969, Page(s):81 - 87
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1268 KB)

    The effect of essential nonlinearity of phase-sensitive detector characteristics is studied and determined theoretically in detail, assuming that the input signal is a sine wave in the presence of additive narrow-band Gaussian noise. Minimum, maximum, and limiting values of nonlinearities of detector characteristics as functions of the input signal-to-noise ratio and the phase angle between the in... View full abstract»

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  • A Digital Integrated Circuit Radiosonde System

    Publication Year: 1969, Page(s):88 - 93
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (877 KB)

    An integrated circuit radiosonde system was constructed and tested, with results indicating an improvement over the existing methods. This work deals with establishing the parameters. circuit design, construction, and testing of such a system. Sampling, pulse width modulation, time multiplexing, and pulse width to digital conversion are discussed. Further improvements for a follow-on system are de... View full abstract»

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  • A Technique for Synthesizing Digital Filters

    Publication Year: 1969, Page(s):93 - 96
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (803 KB)

    In designing digital systems, one often faces the task of replacing a given analog filter by an equivalent digital filter. This paper proposes a method for synthesizing such digital filters in the time domain. It is assumed that the pulsed transfer function of the digital filter is a ratio of two rational polynomials. The coefficients are then determined by least-square fitting the digital filter ... View full abstract»

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  • Digital Generation of Low-Frequency Sine Waves

    Publication Year: 1969, Page(s):97 - 105
    Cited by:  Papers (6)  |  Patents (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1588 KB)

    Generation of approximately sinusoidal waveforms by a digital method is described. Very low frequencies (below 1 Hz) are easily obtained without the use of large inductors or capacitors, and the method is fully compatible with integrated circuit techniques. A process equivalent to nonrecursive digital filtering is used to remove the majority of harmonics from a binary waveform generated by a feedb... View full abstract»

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  • Bulk Microwave Conductivity of Semiconductors Determined from TEo01-Mode Reflectivity of Boule Surface

    Publication Year: 1969, Page(s):105 - 110
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1059 KB)

    This paper describes an "electrodeless" technique for measuring microwave conductivity and dielectric constant of a bulk semiconductor boule without the necessity of fabricating samples. All that is required is that the boule be sufficiently large and that it have one planar surface. The planar surface is butted up to a flange terminating a circular waveguide. The complex TEo01 (circular E-field) ... View full abstract»

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  • Hybrid Function Generator

    Publication Year: 1969, Page(s):110 - 113
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1248 KB)

    A novel hybrid function generator that replaces a servo multiplier previously used in an instrument to measure the length distribution function of a population of cotton fibers is described. The function generator linearizes the output of a photocell by extracting the square root of this signal and displaying the result in digital form as well as producing an analog signal. It has general applicat... View full abstract»

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  • Microwave Measurement of Saturation Magnetization of Ferrites

    Publication Year: 1969, Page(s):114 - 117
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (855 KB)

    A microwave method of measurement of 4πMs, for high-resistivity materials such as ferrites and garnets is described. The method employs the ferromagnetic resonance absorption of microwave energy, and the shape-dependent demagnetization effects as given by Kittel's equation to evaluate 4πMs. Effects of specimen shape and position are analyzed, and the superiority of a method employi... View full abstract»

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  • Industrial Arc Instrumentation

    Publication Year: 1969, Page(s):117 - 124
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1824 KB)

    Hitherto the instrumentation of moving arcs has been neglected and photographic methods have mainly been used to determine arc velocities. Furthermore, previous arc research has been confined, in the main, to high-speed arcs (greater than 10 ft/s) in circuit breaking and similar applications. This paper considers, for the first time, the slowly moving arc (about 1 ft/min) associated with such indu... View full abstract»

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  • A New Simple Wide-Band Current-Measuring Device

    Publication Year: 1969, Page(s):125 - 128
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (814 KB)

    The current conveyor-a new circuit building block recently introduced-is applied to the design of a simple current-measuring probe. The monopolar version of this probe features high stability and accuracy (0.5 percent of nominal reading). A dc to 100-MHz frequency band is obtained from the bipolar version. Both versions minimize the disturbance to the measured circuit by presenting a very low impe... View full abstract»

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  • Measurement of High Q at High Frequencies

    Publication Year: 1969, Page(s):129 - 132
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1553 KB)

    A high Q tuned circuit is shock excited by the pulsed interruption of current flow through a pair of charge-storage diodes. The resulting damped oscillation is recorded via an FET source follower on a CRO or X-Y recorder. The Q is calculated from the observed logarithmic decay period. A Q of over 900 is readily measured at 60 MHz. The method is useful in the measurement of varactor series resistan... View full abstract»

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  • Digital Instrumentation for Angular Velocity and Acceleration

    Publication Year: 1969, Page(s):132 - 138
    Cited by:  Papers (25)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1144 KB)

    An instrument is described for the measurement of angular velocity and angular acceleration of a rotating shaft, based upon an optical angular transducer and an associated operational digital (pulse rate) system. The angular transducer produces a pulse rate directly proportional to the instantaneous angular velocity and this quantity and its rate of change are processed by the pulse rate system an... View full abstract»

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  • Modulation Measurements-Theory and Technique

    Publication Year: 1969, Page(s):139 - 144
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1062 KB)

    This tutorial paper reviews analog modulation theory. Emphasis is upon recent advances in the theory, and the implication of these advances upon measurement of properties of modulated signals. A technique for developing measurements is given. View full abstract»

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  • Contributors

    Publication Year: 1969, Page(s):145 - 148
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  • IEEE Instrumentation and Measurement Group

    Publication Year: 1969, Page(s): 148a
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  • Invitation for Papers

    Publication Year: 1969, Page(s): 148-b
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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