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IEEE Transactions on Instrumentation and Measurement

Issue 3 • Date Aug. 1970

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Displaying Results 1 - 15 of 15
  • [Front cover]

    Publication Year: 1970, Page(s): c1
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  • IEEE Instrumentation and Measurement Group

    Publication Year: 1970, Page(s): c2
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  • Table of contents

    Publication Year: 1970, Page(s): 143
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  • Use of a Sampling Scheme to Detect Transient Saturation in Protective Current Transformers

    Publication Year: 1970, Page(s):144 - 147
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1776 KB)

    Current-transformer (CT) saturation due to primary dc transient offsets presents a problem with regard to fast and predictable operation of protective relays. In this paper, a method is devised and tested for detecting the presence of saturation by sampling the output of the current transformer every millisecond. Successive sampled values are compared and a large difference between these values is... View full abstract»

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  • Frequency Measurement Errors of Passive Resonators Caused by Frequency-Modulated Exciting Signals

    Publication Year: 1970, Page(s):147 - 152
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1808 KB)

    The condition of resonance for a signal with FM is defined in this paper as the condition of maximum power transfer by the resonant device. It is shown that if the width of the signal spectrum is small compared to the resonator's linewidth, then the frequency error is proportional to the third moment of the instantaneous signal frequency about its mean. One expects that this treatment should, at l... View full abstract»

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  • Simple Time-Delay Circuit with Very High Duty Cycle

    Publication Year: 1970, Page(s):152 - 156
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1827 KB)

    A voltage-controlled time-delay arrangement with a duty cycle equal to unity is described. This performance of the circuit is based on the use of a new monostable switch with complementary transistors. The monostable switch, derived from a free-running multivibrator with very small mark/space ratio is employed as the trigger time base generator, the recovery time of which is very short. Such a tim... View full abstract»

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  • Improvements in Atomic Cesium Beam Frequency Standards at the National Bureau of Standards

    Publication Year: 1970, Page(s):156 - 160
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3085 KB)

    The National Bureau of Standards Frequency Standard, NBS-III, a cesium beam with a 3.66-meter interaction region, has been in operation since 1963. The last published (1966) accuracy capability for NBS-III was 1.1 ¿ 10-12(l¿). Recently, several new solid-state broad-band frequency-multiplier chains have been constructed. Reduction of the random phase noise by more than 20 dB compared to the prev... View full abstract»

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  • Direct Reading Ratio-Error Sets for the Calibration of Current Transformers

    Publication Year: 1970, Page(s):161 - 166
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2153 KB)

    Four different direct reading ratio-error sets, capable of generating measured complex fractions of an input reference current to a nominal accuracy of 1 percent of reading for such applications as current-transformer calibration, are described and analyzed. Construction and performance details for actual sets with 3 or more digit resolution in both direct and quadrature components from 0.1 parts ... View full abstract»

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  • Pulsed Langmuir Probe Measurement of Ionization in a High-Pressure Plasma

    Publication Year: 1970, Page(s):167 - 171
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1748 KB)

    Measurements with a negatively pulsed probe in an atmospheric-pressure high-density plasma over wide ranges of ionization density (1015-1018/meters3), probe voltage (10-400 volts), and flow velocity (5-40 m/s) have confirmed previous results obtained by Thomas, working at a single voltage and flow velocity in which the current initially falls off with a t-y dependence where y ¿ 0.58 and t = time.... View full abstract»

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  • Improved Bias Supply for Tunnel-Diode Picosecond Pulse Generators

    Publication Year: 1970, Page(s):171 - 175
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1518 KB)

    An improved bias supply for tunnel-diode (TD) picosecond-pulse generators is described. The supply is stable with temperature and, in a commercial 35-ps (nominal) risetime tunneldiode pulse generator/sampling oscilloscope system, has produced a 4:1 reduction in time-base jitter and 2:1 reduction in time-base drift. Also described is a tunnel-diode pulse generator, which, when used with the bias su... View full abstract»

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  • Comment on "The Application of the Direct Current Comparator to a Seven-Decade Potentiometer"

    Publication Year: 1970, Page(s): 176
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  • Contributors

    Publication Year: 1970, Page(s):177 - 178
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  • IEEE Standard Specification of General-Purpose Laboratory Cathode-Ray Oscilloscopes

    Publication Year: 1970, Page(s):179 - 194
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3106 KB)

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  • IEEE Instrumentation and Measurement Group

    Publication Year: 1970, Page(s): 194-a
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  • Invitation for Papers

    Publication Year: 1970, Page(s): 194-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.

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