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IEEE Transactions on Instrumentation and Measurement

Issue 4  Part 2 • Dec. 1985

 This issue contains several parts.Go to:  Part 1 

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Displaying Results 1 - 25 of 26
  • Table of contents

    Publication Year: 1985, Page(s): c1
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  • IEEE Instrumentation and Measurement Society

    Publication Year: 1985, Page(s): c2
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  • A Holiday Gift for Transactions Readers

    Publication Year: 1985, Page(s): 601
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  • Microwave Attenuation Measurement by Time-Interval Ratio

    Publication Year: 1985, Page(s):602 - 606
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1174 KB)

    A new method of measuring microwave attenuation using time or frequency as the reference is described. It is a power ratio type of system in which power flowing through the unknown attenuator is controlled by a constant pulsewidth, variable period, and pulse-modulated p-i-n diode switch. This power is detected by a thin-film thermocouple (TFT), the output of which is compared with that of a simila... View full abstract»

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  • Wide-Band Homodyne Method of Measuring Microwave Circuits

    Publication Year: 1985, Page(s):606 - 610
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1157 KB)

    Two-arm homodyne systems which enable simultaneous and precision measurement of real and imaginary parts of parameters are investigated. The usual manual and time consuming calibration of the system, necessary for each measuring frequency is troublesome. The difficulty has been avoided by introducing a special scaling process, and then calculator correcting the systematic measurement errors within... View full abstract»

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  • An Improved Method for Six-Port Reflectometer Calibration

    Publication Year: 1985, Page(s):611 - 615
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (781 KB)

    An improved method for six-port reflectometer calibration is presented using a matched load and three offset short circuits as calibration standards. An iterative method is used to solve a system of nonlinear simultaneous equations. The information from four standards has been fully utilized. There is no limitation that one of the ports must indicate incident power only, and no need to make additi... View full abstract»

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  • A Simplified Error Model for Accurate Measurement of High-Frequency Transistor S Parameters

    Publication Year: 1985, Page(s):616 - 619
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (769 KB)

    This paper presents a simplified error model for error correction for the measurement of S parameters in high-frequency transistors. The simplification process involves zero order approximation of the transistor parameters S21 and S12, and a one time, rather than successive iteration, approximation of the reflection parameters S11 and S22. The simplified error model can be programmed within the ca... View full abstract»

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  • Perpetual Pulsewidth Counter

    Publication Year: 1985, Page(s):620 - 623
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (952 KB)

    The Perpetual Pulsewidth Counter (PPWC) provides an excellent capability for precise pulsewidth or time-interval detection. This efficient and inexpensive circuit solution will overcome the known difficulties of conventional pulsewidth detectors. Its ability to perpetually and precisely detect single pulsewidths makes it possible to build a precise pulse sorter with a continuous number of windows.... View full abstract»

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  • Estimation of an Initial Phase over Extremely Short Record-Length of a Sinewave Signal

    Publication Year: 1985, Page(s):624 - 629
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1111 KB)

    It is known that the traditionally used statistically optimal estimator for the initial phase of a sinewave signal possesses a certain systematic bias whose value depends on an unknown initial phase. Due to the inaccuracies involved in estimating an initial phase, such an estimator fails in practice when the record length of a sinusoidal signal is less than one period. This paper presents a new al... View full abstract»

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  • Speed Improvements for Dual-Slope A/D Converters

    Publication Year: 1985, Page(s):630 - 635
    Cited by:  Papers (5)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1121 KB)

    This article illustrates four techniques applied to the well-known dual-slope analog-to-digital converter (ADC) in order to improve its speed of conversion. These are triple-slope, multislope I, multislope II, and multislope III, respectively. Linear and digital IC's have been used in these techniques. To minimize cost one of the design goals was to devise techniques requiring a minimum of precisi... View full abstract»

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  • An Improved Linear Temperature/Voltage Converter Using Thermistor in Logarithmic Network

    Publication Year: 1985, Page(s):635 - 638
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1409 KB)

    An improved and inexpensive circuit using a thermistor in a logarithmic network is presented, whereby it is possible to realize a linear temperature/voltage conversion over a wide dynamic range with an output which is independent of fluctuations in ambient temperature. Test results are given to support the theoretical conclusions. The attractiveness of the scheme lies in its simplicity and the fac... View full abstract»

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  • A Wide-Band Transconductance Amplifier for Current Calibrations

    Publication Year: 1985, Page(s):639 - 643
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2986 KB)

    A wide-band transconductance amplifier for current calibrations is described. The amplifier will deliver a ground-referenced constant current of 5 A rms from dc to over 100 kHz. Its stable magnitude and phase permit it to be used in precise power calibration systems to provide the current component of a phantom power source. The amplifier also provides a ground-referenced voltage output of 1 V/A f... View full abstract»

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  • Microprocessor-Based Microwave Dielectric Measurement of Liquids by Waveguide Plunger Technique

    Publication Year: 1985, Page(s):643 - 646
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (782 KB)

    The measurement of the dielectric permittivity (????) and loss (????) of liquids at microwave frequencies (4-36 GHz) by the waveguide plunger technique is automated with the help of a single-board microcomputer, based on the Intel 8085 microprocessor. Both the data acquisition and analysis using curve-fitting technique are implemented in this stand-alone dedicated system. Measurements were made wi... View full abstract»

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  • Convergence of Shielded Room Error Analysis Using Image Antenna Theory

    Publication Year: 1985, Page(s):647 - 649
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (469 KB)

    The near-zone magnetic field radiated by a small-loop antenna has been used for the sensitivity test of a radio receiver. When an external interference field exists around the antennas, the test must be carried out in a shielded room. The formulas to estimate the effect of the room on the standard magnetic field are derived by using the image antenna theory. These formulas are expressed in the for... View full abstract»

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  • Single-Shunt Fault Diagnosis through Terminal Attenuation Measurement and Using Fibonacci Numbers

    Publication Year: 1985, Page(s):650 - 653
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (563 KB)

    A method is proposed of single-shunt fault diagnosis in an N-section recurrent resistive ladder through terminal voltage attenuation measurement and using the Fibonacci number. The fault value is proportional to the forward and backward voltage attenuations in the ladder and some fixed Fibonacci numbers dependent on the number of sections of the ladder, thus making the evaluation very accurate. Th... View full abstract»

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  • Design of a Smart Display for Monitoring Physical Variables

    Publication Year: 1985, Page(s):654 - 659
    Cited by:  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1308 KB)

    Design of a multichannel cathode ray tube (CRT) display system to monitor eight physical variables is described. The display includes channel identifiers, cursors for real-time values of variables and their safe limits. Sequence of faults and fault conditions on any channel are appropriately depicted to aid recovery from hazardous condition. The display of number of channels, in groups of 2, 4, an... View full abstract»

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  • Design of a 3/2-Order Phase-Locked Loop for Improved Laser Probe Resolution

    Publication Year: 1985, Page(s):660 - 664
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1145 KB)

    A 3/2-order phase-locked loop (PLL) was realized in order to increase the ultimate resolution of a heterodyne laser probe. The essential features of this PLL include: large-scale static-gain tuning, phase margin of 45??, and constant transfer function Q-factor (??2). A linearized theory was developed, pointing out the advantages of the 3/2 order. The PLL developed for the laser probe can be used f... View full abstract»

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  • Influence of a Filter on the Phase and Amplitude Noise Spectra of an Oscillator: Consequence for Spectral Purity Measurements

    Publication Year: 1985, Page(s):665 - 670
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1078 KB)

    If a signal goes through a linear filter, the transfer function of the filter modifies the spectra of the phase and of the amplitude fluctuations of the signal, and induces a cross spectrum. These phenomena are analyzed as a function of the filter characteristics and of the degree of correlation between the two initial noises. Theoretical and experimental results are presented and the implication ... View full abstract»

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  • Analog-Filter Digital-Correlator Hybrid Spectrometer

    Publication Year: 1985, Page(s):670 - 675
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1117 KB)

    A system is described for measuring the power spectrum and cross spectral density of wide-band (?? 50 MHz) noise-like signals which occur, for example, in radio astronomy. The system utilizes a comb-filter bank followed by digital correlator processing of each filter output. The cost equation, design factors, and a sample system are described. For measurement of the spectrum at a large number of f... View full abstract»

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  • A Low-Noise Low-Input Conductance Preamplifier for Gravitational Research

    Publication Year: 1985, Page(s):676 - 680
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1266 KB)

    We report on the specification, the design, and the characterization of a FET-input low-noise preamplifier with low-input conductance that has been developed for gravitational-wave research. At approximately 900 Hz the noise temperature of the preamplifier is 69 mK and its input conductance is ~ -2 nS. This preamplifier has recently been used during the first cooling to liquid helium of a 2.2-ton ... View full abstract»

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  • Temperature versus Pressure Dependence of Accurate Pressure Piezoelectric Sensors

    Publication Year: 1985, Page(s):680 - 682
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  • A New Measurement Technique for MOS Capacitors

    Publication Year: 1985, Page(s): 682
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  • Contributors

    Publication Year: 1985, Page(s):683 - 687
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  • 1985 Index IEEE Transactions on Instrumentation and Measurement Vol. IM-34

    Publication Year: 1985, Page(s):1 - 14
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  • [Advertisement]

    Publication Year: 1985, Page(s):14-a - 14-e
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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.

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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