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IEEE Transactions on Instrumentation and Measurement

Issue 4 • Dec. 1982

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Displaying Results 1 - 21 of 21
  • Table of contents

    Publication Year: 1982, Page(s): 1
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  • [Inside front cover]

    Publication Year: 1982, Page(s): c2
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  • IEEE instrumentation and measurement society awards call for nominations

    Publication Year: 1982, Page(s):221 - 222
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  • Measured flatness of microwave-induced steps at Josephson tunnel junctions with near-zero-current bias

    Publication Year: 1982, Page(s):223 - 226
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1005 KB)

    In voltage standards that use series-connected hysteretic Josephson tunnel junctions with zero-current bias, the working point on a microwave induced step is not the middle of the step. Towards the ends of a step, theories predict that noise will produce appreciable deviations from the well-defined DC voltage. Measurements of these deviations on the zeroth and first step are presented. The voltage... View full abstract»

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  • Microwave interferometer for measurements of small displacements

    Publication Year: 1982, Page(s):227 - 232
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1348 KB)

    Two microwave interferometer systems developed for noncontact measurements of small displacements in an electromagnetically semitransparent medium are described. Arrangements for testing the instruments and experimental results are presented. The principal characteristics of the systems, e.g. the output signal versus the displacement of the scattering object, are linear for the two-way losses in t... View full abstract»

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  • Some characteristics of X-ray linear motion tomography

    Publication Year: 1982, Page(s):232 - 238
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2804 KB)

    General characteristics of an X-ray linear motion tomographic system are discussed. It is a system which is frequently used in clinical medicine. The response characteristics of this system are first derived theoretically and then verified experimentally by using an X-ray imaging device equipped with an on-line computer. In addition, the on-plane space and frequency response characteristics of thi... View full abstract»

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  • Carrier-frequency estimation based on the location of the spectra peak of a windowed sample of carrier plus noise

    Publication Year: 1982, Page(s):239 - 249
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3737 KB)

    The frequency of an unmodulated (CW) carrier frequency transmission may be estimated by identifying the location of the peak value of the spectrum of a windowed sample of T-seconds duration. The authors quantitatively evaluate the effect of window shape and length (leakage) as well as the effect of additive broad-band noise on the accuracy of this method of estimation. An interesting result... View full abstract»

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  • Response linearization of a diode detector type radio frequency electric field probe

    Publication Year: 1982, Page(s):249 - 254
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1492 KB)

    An EPROM-based linearization circuit with a resolution of 0.1 percent of full scale has been designed to linearize the response of an orthogonal dipole electric field probe terminated with diodes. Design approach, performance, and probe characteristics are discussed. The nonlinear transducer response is first modeled with a fourth-order polynomial which fits the log-transformed calibration data. T... View full abstract»

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  • Two-phase frequency-conversion type spectrum analyzer for low-frequency noise measurement

    Publication Year: 1982, Page(s):255 - 261
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1257 KB)

    An improved analog spectrum analyzer, which is suitable for noise analysis at very low frequencies, is presented. It is composed of two multipliers, two squarers, a summation circuit, and an integrator. This analyzer has half the value of the statistical error compared with that of the conventional analog analyzer. The design principle, actual circuit, and examples of the measured noise spectra at... View full abstract»

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  • The calibration of a DAC using differential linearity measurements

    Publication Year: 1982, Page(s):261 - 265
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1083 KB)

    The differential linearity adjustment procedure offers an accurate method of digital-to-analog converter (DAC) adjustment with only modest accuracy in the instrumentation. The author shows that the worst case error in linearity due to a differential linearity error (DLE) of e in the upper N bits is bounded by Ne/3. Self-heating effects and output drive asymmetry can cause supe... View full abstract»

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  • A sensitive analog comparator

    Publication Year: 1982, Page(s):266 - 269
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1046 KB)

    A strobed, sensitive analog comparator has been developed for use in the NBS Data Converter Test Facility. The comparator has a sensitivity of 1.5 μV and a response time of 30 μs to within 10 μV, following input steps up to 20 V. Signal voltages up to ±10 V are compared with reference voltage levels of opposite polarity, using a precision resistive divider. The input of... View full abstract»

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  • Effect of shielded room on standard magnetic field

    Publication Year: 1982, Page(s):269 - 273
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1055 KB)

    The near-zone magnetic field generated by a small loop antenna has been used for sensitivity test of a radio receiver. When external interference fields exist around the antennas, the test must be carried out in a shielded room. The formulas to estimate the effect of the shielded room on the standard magnetic field are derived for the coaxial and the coplanar alignments of the loops. The differenc... View full abstract»

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  • Microwave short-pulse generator for bed-level detection

    Publication Year: 1982, Page(s):273 - 278
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1877 KB)

    Describes the design and testing of a short-pulse microwave radar system which is simple both in design and operation. The radar can be used for measuring with accuracy targets which are very near the measurement system. A very simple step-recovery diode circuit is used to generate the radar pulses. Experimental testing has been conducted in the laboratory using metal and limestone targets. View full abstract»

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  • A new approach to reducing power dissipation in thermistor probe for temperature/frequency converter based on astable multivibrator

    Publication Year: 1982, Page(s):278 - 279
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    A novel approach to reducing power dissipation in a thermistor probe for temperature/frequency converting circuit based on IC op-amp astable multivibrator is described. The output/input relation is linear over a wide temperature range with sensitivity 35 Hz/K. Experimental results are given to support the theoretical conclusions. View full abstract»

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  • Performance studies of a high-speed ultrasonic sing-around system

    Publication Year: 1982, Page(s):280 - 281
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (622 KB)

    The performance of a high-speed ultrasonic sing-around system has been evaluated by comparing it to a standard sing-around system averaging over a period of a few seconds. The high-speed version can measure the sing-around period and therefore the velocity of sound in approximately 10 μs and is found to have an absolute accuracy of ±3 ns confirming earlier estimates. View full abstract»

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  • Compensation technique for force balance devices

    Publication Year: 1982, Page(s):281 - 283
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (888 KB)

    Presents a technique used for providing adequate damping in force balance devices by the use of an additional coil. The main advantages of this scheme over conventional methods of using lead-lag networks is that the method does not accentuate high-frequency noise and the damping can be adjusted independent of the forward loop gain. View full abstract»

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  • Some experimental results on quartz-crystal resonators at temperature below 4.2 K

    Publication Year: 1982, Page(s):283 - 284
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (780 KB)

    Properties of quartz-crystal resonators at temperature below 4.2K have been measured for two different types of crystals: 5-MHz resonators of the BVA2 design (electrodeless design) and the conventional 5th overtone, AT-cut design. The Q for both types is increased by about one order of magnitude at 4.2K. No significant increase in Q below 4.2K was obtained in either type o... View full abstract»

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  • Generation of a sine wave from two in-quadrature triangular waves

    Publication Year: 1982, Page(s):284 - 286
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (613 KB)

    A simple and effective method is proposed for transforming two in-quadrature triangular waves into a low-distortion sine wave. A circuit performing this operation is described that includes two multipliers and an absolute value device. View full abstract»

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  • Comments on “a linear temperature-to-frequency converter using a thermistor”

    Publication Year: 1982, Page(s): 287
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (374 KB)

    In the above short paper (see ibid., vol.IM-30, p.296-9, 1981), the experimental result shows that frequency varies approximately from 380 to 1000 Hz for a variation in temperature from 0°C to 70°C with RcRT0=0.23. The author suggests that there is a large discrepancy between the theoretical and practical results leading to the doubt whether circui... View full abstract»

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  • Contributors

    Publication Year: 1982, Page(s):288 - 292
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  • Author index

    Publication Year: 1982, Page(s):1 - 7
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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