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Instrumentation and Measurement, IEEE Transactions on

Issue 1 • Date March 1980

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Displaying Results 1 - 25 of 28
  • Table of contents

    Publication Year: 1980 , Page(s): c1
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    Freely Available from IEEE
  • IEEE Instrumentation and Measurement Society

    Publication Year: 1980 , Page(s): c2
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  • A Communication from the President of the IEEE Instrumentation and Measurement Society

    Publication Year: 1980 , Page(s): 1
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  • A Communication from the Editor

    Publication Year: 1980 , Page(s): 2
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  • A cascade phase sensitive detector-phase response

    Publication Year: 1980 , Page(s): 3 - 6
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (718 KB)  

    A phase sensitive detector (PSD) described permits the realization of any phase response by means of many like stages in cascade or in parallel. Two such configurations-one providing the best phase selectivity and the other the best phase discrimination sensitivity-are discussed in detail to demonstrate practical applications. The performance of a prototype detector supports the principles of operation. View full abstract»

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  • A Wide Dynamic Range Analog-to-Digital Conversion System for GCMS Applications

    Publication Year: 1980 , Page(s): 7 - 10
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    An analog-to-digital conversion system is described which utilizes three parallel integrators of different sensitivities in front of a 12-bit analog-to-digital converter (ADC) to achieve a wide dynamic range, high linearity, and noise reduction. Gain ranging decisions are made by the hardware using a novel method of checking the ADC serial data output, with a minimal amount of logic circuitry. Applications to gas chromatography mass spectrometry (GCMS) are described. View full abstract»

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  • An Event-Driven Logic Timing Analyzer

    Publication Year: 1980 , Page(s): 10 - 14
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    Logic analyzers are proving themselves the single most important instrument for monitoring large digital systems. Supplemented by more traditional instrumentation, both state and timing analyzers prove useful in testing microcomputers and other complex systems. A brief description of state and timing analyzers is given for orientation. An event-driven analyzer is postulated as a more memory efficient architecture for large timing analyzers. Rather than replace timing analyzers, the event-driven architecture should make high resolution and long time window timing analysis possible at reasonable cost. View full abstract»

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  • An Accurate Integrable Voltage-Variable Floating Gyrator

    Publication Year: 1980 , Page(s): 15 - 19
    Cited by:  Papers (3)  |  Patents (1)
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    An integrable circuit for simulating voltage-variable floating gyrator is described, where it can be employed to realize a highly accurate and linear voltage-variable floating inductance. The equivalent inductance can be made both linearly proportional and inversely proportional to the controlling voltage. View full abstract»

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  • A Digital Power Spectrum Analyzer

    Publication Year: 1980 , Page(s): 20 - 23
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    In this paper we develop a new algorithm for a digital power spectrum analyzer. The advantage of this new algorithm is that it makes possible the lowering of the average sampling rate without incurring large errors. View full abstract»

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  • The Use of Capacitance Sensors for Phase Percentage Determination in Multiphase Pipelines

    Publication Year: 1980 , Page(s): 24 - 27
    Cited by:  Papers (13)
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    A variety of capacitance designs are considered for determining the volume fractions in two-phase pipelines. Experimental results are compared for the most promising structures and for slug (SL) and stratified (ST) flow patterns. It is concluded that the most practical linear sensor is the double helix capacitance, although in some instances a four concave-plate structure may be preferred for greater sensitivity and simplicity of construction if the flow pattern is known. View full abstract»

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  • New Methods of Measuring Capacitance and Resistance of Very High Loss Materials at High Frequencies

    Publication Year: 1980 , Page(s): 28 - 36
    Cited by:  Papers (2)
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    Two new circuits for the accurate measurement of specimen capacitance and resistive loss are described. The capacitance measurements are unaffected by the specimen resistance when the parallel resistance is greater than 30 ¿. The practicality of the circuit is enhanced by its use of coaxial cable to provide both connection to the sample and the inductance required for circuit operation. An important characteristic of the circuit is its ability to measure capacitance and resistance of very high loss specimens accurately. View full abstract»

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  • Fast Fourier Transform for Step-Like Functions: The Synthesis of Three Apparently Different Methods

    Publication Year: 1980 , Page(s): 36 - 39
    Cited by:  Papers (8)
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    In 1965 Cooley and Tukey published an algorithm for rapid calculation of the discrete Fourier transform (DFT), a particularly convenient calculating technique, which can well be applied to impulse-like functions whose beginning and end lie at the same level. Independently, various propositions were made to overcome the truncation error which arises, if a step-like function, i.e. one whose end level differs from its starting level, is treated in the same way. It was argued that they behave differently under the influence of noise, band-limited violation, and other experimental inconveniences. The aim of this paper is to show that the three widely and satisfactorily used techniques of Samulon, Nicolson, and Gans, which originate from apparently different ideas, are exactly the same. An extended DFT and fast Fourier transform (FFT) formula is deduced which is adapted as well to impulse-like as to step-like functions. View full abstract»

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  • On the Matching and Tuning of a Helical Resonator: Mechanical and Electrical Solutions in X Band

    Publication Year: 1980 , Page(s): 40 - 43
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    The use of varactor diodes to match and tune an X-band helical resonator is compared to mechanical tuning. It is shown that only small corrections can be achieved with electrical solutions because of the V-1/2 variations of the junction capacity of the low-loss GaAs diode. For the time being, only mechanical devices allow large corrections for the matching and tuning of a helical resonator. View full abstract»

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  • Measurement of Dielectric Loss Using a Cut-Off Circular Waveguide Cavity

    Publication Year: 1980 , Page(s): 44 - 48
    Cited by:  Papers (2)  |  Patents (2)
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    Based on a resonant cavity technique used by Hanfling and Botte, this paper describes an extension of their method for the determination of the loss tangent of dielectric materials by means of Q-factor measurements. The present method appears to be suitable for materials of low loss (tan ¿ < 0.001). Measurements made on Teflon samples using a modified copper cavity designed for the X-band are reported. View full abstract»

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  • A Method to Evaluate the Second Breakdown Resistance of Power Transistors

    Publication Year: 1980 , Page(s): 48 - 51
    Cited by:  Papers (1)
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    A new evaluation method of forward-biased second breakdown resistance in power transistors employing a characteristic variation of current gain is presented. Predictions for second breakdown resistance in power transistor are made by monitoring the changing point of the base current at the collector-base junction under the constant voltage and constant current conditions. This characteristic phenomenon which is related to the variation of the current gain is dependent on the temperature and current density at a localized spot of the transistor. It is concluded that the time delay required to reach the changing point of the base current can be considered as a measure of the second breakdown resistance. The forward-biased second breakdown resistance can be measured without damage or degradation of the sample transistors, if the supplied power is removed before the base current reaches the changing point. View full abstract»

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  • Application of Walsh Transforms for Topographic Feature Extraction Using a Sensor Array System

    Publication Year: 1980 , Page(s): 52 - 57
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    Signal signatures and signatures of various spectral decompositions of selected topographic feature images, such as line roads, road intersections, and buildings were developed using a sensor array system with Walsh transform processing. Signal signatures of selected topographic features were constructed in the spatial domain, while the corresponding signatures of various spectral components were obtained in the Walsh transform domain. An electronic system for generating two-dimensional Walsh functions for decomposition of topographic features was designed. A scheme for detecting the decomposed spectral components using an analog processor is presented. View full abstract»

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  • Analog Real-Time Statistical Analyzer Utilizing CCD's to Implement a Decision Algorithm

    Publication Year: 1980 , Page(s): 58 - 66
    Cited by:  Patents (1)
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    A system is presented to realize the function of a linear regression analyzer using analog charge-coupled device (CCD) tapped delay lines to perform fast parallel processing. Such systems are normally implemented using digital computing techniques giving a nonreal-time output. The analog approach discussed in this paper is capable of providing results in real time at the sampling rate of several hundred kilohertz, with the added advantage of reduction in power consumption and physical size. Results obtained from a prototype system are presented to demonstrate the principles of the system operation. View full abstract»

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  • Contactless Measurement of Silicon Resistivity in Cylindrical TE01n Mode Cavities

    Publication Year: 1980 , Page(s): 67 - 70
    Cited by:  Papers (3)
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    This paper presents a new contactless method of resistivity measurement of semiconductor plates which is being applied in the production practice with the use of microwave cylindrical TE01n nmode resonators The errors of resistivity measurement have been shown in the example of silicon plates and the TE013 mode cavity working in the X band. It has been shown that for the plates of thickness 100-1200 ¿m and diameters larger than 60 percent of the diameter of the cavity, silicon resistivity can be measured in the range of 10-6-102 ¿×m, accurate to several percent. Experimental verification of the present method has been made by comparison of the results of silicon resistivity measured by the conventional four-point probe method. View full abstract»

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  • New Optical Power Meter for Optical Fiber Transmission System Applications

    Publication Year: 1980 , Page(s): 71 - 73
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    This paper describes a design and the characteristics of a new optical power meter for 0.8-¿m wavelength region optical fiber transmission systems. Features of this optical power meter are high sensitivity (-80 dBm), high stability (±0.005 dB at > -65 dBm), and small deviation against the plug rotation inside the receptacle (±0.02 dB). The SNR design method presented is useful in high sensitivity and high stability optical power meter design. View full abstract»

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  • Optical Power Supply for Measuring or Communication Devices at High-Voltage Levels

    Publication Year: 1980 , Page(s): 73 - 74
    Cited by:  Papers (2)
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    Measuring or communication devices at high-voltage levels having small power consumption can be supplied by generating optical power with light emitting diodes at ground potential, transmitting the power through a glass rod and detecting it with solar cells at high potential. View full abstract»

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  • Integration Gain Associated with the Detection of a Moving Target at a Fixed Range

    Publication Year: 1980 , Page(s): 74 - 75
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    An expression for the integration gain during detection at a fixed range of an angle-tracked target moving at constant velocity relative to the radar is derived. Idealized pulse shapes are utilized in the derivation. View full abstract»

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  • An Improved GaAs Laser Radar System

    Publication Year: 1980 , Page(s): 75 - 77
    Cited by:  Papers (1)  |  Patents (1)
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    Signal processing methods allow the significant improvement of GaAs laser radar systems. Starting from theoretical investigations a system has been designed and tested. Experimental results confirmed theoretical predictions. View full abstract»

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  • A Programmable CRT Display Scheme for Memory Output

    Publication Year: 1980 , Page(s): 77 - 79
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    This paper describes a novel scheme for the X-Y display of memory address versus contents with facilities to expand any region of interest (ROI) in the memory and to generate a marker corresponding to any selected address. Instead of using a digital-to-analog converter (DAC) for the x axis, a fixed-amplitude ramp is generated corresponding to user-selected addresses for the starting and completion of the scan over the desired segment of the memory. The CRT display is blanked for the region outside the selected range of addresses and intensified at the marker location. The scheme has been successfully used to obtain the X-Y display of the contents of selected regions of a memory, ranging from a minimum of 100 words to a maximum of 2000 words. View full abstract»

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  • Comments on "Electronic Error-Compensation of a Voltage Transformer"

    Publication Year: 1980 , Page(s): 79 - 80
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  • Comments on "Modern Numerical Analysis of Time-Division Multipliers"

    Publication Year: 1980 , Page(s): 80 - 81
    Cited by:  Papers (5)
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    First Page of the Article
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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
Prof. Alessandro Ferrero
Dipartimento di Elettrotecnica
Piazza Leonardo da Vinci 32
Politecnico di Milano
Milano 20133 Italy
alessandro.ferrero@polimi.it
Phone: 39-02-2399-3751
Fax: 39-02-2399-3703