IEEE Transactions on Instrumentation and Measurement

Issue 2 • June 1982

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Displaying Results 1 - 24 of 24
  • Table of contents

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

    Publication Year: 1982, Page(s): 1
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  • A communication from the president

    Publication Year: 1982, Page(s):81 - 82
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  • Monoion oscillator as potential ultimate laser frequency standard

    Publication Year: 1982, Page(s):83 - 87
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2335 KB)

    An individual atomic ion localized in the center of a small Paul RF quadrupole trap has potential as an ultimate laser frequency standard because the ion may be brought to `a state of complete rest in free space' by sideband cooling. As a consequence, all Doppler shifts vanish, `Free Space' is approximated in so far as the electric trapping field vanishes in the center of the trap and there is no ... View full abstract»

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  • Operation of a hydrogen maser with a state-mixed beam

    Publication Year: 1982, Page(s):88 - 91
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (961 KB)

    Operation of a hydrogen maser with a beam having equal populations of atoms in the (F=1, mF=1) and (F=1, mF=-1) hyperfine states is described. The elimination of the magnetic inhomogeneity shift by this means is confirmed. The effect of the state mixing on the frequency stability of the maser is investigated. View full abstract»

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  • A fast local monitoring of dilute no by a tunable laser

    Publication Year: 1982, Page(s):91 - 96
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1391 KB)

    Describes a real-time noncontacting, point-monitoring system for nitrogen monoxide. The monitoring system uses a grating-tuned pulsed dye laser and a specially developed microcomputer-assisted signal processor system. The system is sensitive for analyzing a gas concentration from 0.03 parts per million per meter (ppm/m) theoretically (which should be divided by an optical path length) to 0.4 ppm/m... View full abstract»

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  • Continuous and discrete Fourier transforms of steplike waveforms

    Publication Year: 1982, Page(s):97 - 101
    Cited by:  Papers (29)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (964 KB)

    A steplike waveform which has attained its final value is converted into a duration-limited one which preserves the spectrum of the original waveform and is suitable for discrete Fourier transform (DFT) computations. The method, which is based upon the response of a time-invariant linear system excited by a rectangular pulse of suitable duration, is first applied to continuous waveforms and then t... View full abstract»

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  • The transient response of a square-law gate sampling oscillographic system excited by a steplike pulse having overshoot

    Publication Year: 1982, Page(s):102 - 104
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (668 KB)

    The transient response of a square-law gates sampling oscillographic system excited by a step-like pulse with overshoot is quantitatively analyzed. The square-law gate is driven by a symmetrical hyperbolic cosine pulse of the form B[cosh(1)-cosh(2t/τ)] in the interval (-τ/2)≤t≤(τ/2) and zero for all other times. The response equivalent time t... View full abstract»

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  • Time-domain approach to the problem of sampling

    Publication Year: 1982, Page(s):105 - 109
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1074 KB)

    The statistical parameters form a useful base for solving some problems of superposition as well as transmission of random values through linear systems for arbitrary probability distribution. In the present contribution, the approach is extended to characterizing the time-domain signal properties by statistics of differences in a sequence of signal samples. The dependence of standard deviations o... View full abstract»

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  • Modeling of the HP-1430A feedthrough wide-band (28-ps) sampling head

    Publication Year: 1982, Page(s):110 - 115
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1245 KB)

    The theory and construction of the HP-1430A feed-through sampling head are reviewed, and a model for the sampling head is developed from dimensional and electrical measurements in conjunction with electromagnetic, electronic, and network theory. The model was used to predict the sampling-head step response needed for the deconvolution of true input waveforms. The dependence of the sampling-head st... View full abstract»

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  • Equivalent circuit of an open-ended coaxial line in a lossy dielectric

    Publication Year: 1982, Page(s):116 - 119
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (928 KB)

    An open-ended coaxial line was used as a sensor in measurement of the permittivity of lossy dielectrics at radio and microwave frequencies. A simplified equivalent circuit related the permittivity to the measured input reflected coefficient. A more complete equivalent circuit is proposed and errors in the permittivity measurements resulting from the simplification are analyzed. View full abstract»

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  • Noise equivalent circuit of linear passive two-ports with applications to transmission lines

    Publication Year: 1982, Page(s):119 - 124
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1317 KB)

    A new representation of the thermal noise of linear passive two-ports, expressed in terms of the Thevenin equivalent circuit and convenient to circuit designers, has been derived. This representation is applied to the determination of the contribution of the noise of a transmission line (a special case of a two-port) to the total noise of a noise thermometer system. Preliminary experimental result... View full abstract»

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  • A demountable multiple flash lamp system implemented for laser pumping

    Publication Year: 1982, Page(s):124 - 126
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1226 KB)

    A compact laser pumping cavity is described in which four parallel flash tubes can be easily removed, refurbished, refilled, and reinstalled. The maximum input electric energy, without suffering catastrophic failure of the flash tube is 18 kJ. The electrodes and quartz tubes are detachable and permit easy cleaning and replacement of eroding parts. This system was successfully employed in the pumpi... View full abstract»

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  • On the logarithmic property of basic immittance pairs

    Publication Year: 1982, Page(s):127 - 129
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (727 KB)

    Explains the output of a simple two-element voltage or current dividing circuit (here called a general divider) as being proportional to the logarithm of the input. The general divider's logarithmic property was noted while analyzing a resistive voltage divider. This is extended to show that dividers comprising pairs of passive elements exhibit the logarithmic property and the output can be a curr... View full abstract»

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  • High-speed, low-crosstalk chip holder for Josephson integrated circuits

    Publication Year: 1982, Page(s):129 - 131
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1545 KB)

    Describes the construction and performance of a compact chip mount for making multiple, high-speed, low-crosstalk contacts to a Josephson integrated circuit. The mount has a rise time of about 32 ps and worst case crosstalk between lines of -33 dB. View full abstract»

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  • Programmed data logging in forest harvesting using floating-aperture data compression

    Publication Year: 1982, Page(s):132 - 137
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2846 KB)

    A floating-aperture data compression algorithm has been employed in the design of a data acquisition and recording system for monitoring human and machine performance variables in forest harvesting operations. Use of the algorithm allows multiple analog and digital variables to be sampled but not necessarily recorded at 1/1000-min intervals. Data are only recorded when changes on a channel exceed ... View full abstract»

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  • A fast, simple microcomputer-controlled data acquisition system

    Publication Year: 1982, Page(s):137 - 139
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (816 KB)

    A simple data acquisition scheme has been designed for the TI9900 microcomputer which will simultaneously acquire and store the output of two independent 8-bit, analog-to-digital converters (ADCs) during a single programmed `move' instruction cycle. The ADC is read during the indirectly addressed read part of the `move' cycle and the start conversion is initiated during the indexed indirectly addr... View full abstract»

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  • A direct-reading instrument for measurements of inductance of ferrite-core coils

    Publication Year: 1982, Page(s):139 - 140
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (649 KB)

    A method of measuring the inductance of ferrite core coils which requires no resonant capacitance, thereby eliminating need for circuit tuning to permit quick measurement, is described. The experimental instrument could measure the inductance from 250 to 350 μH at 796 kHz. The values of inductance measured with this instrument agreed with those measured with the conventional Q meter ... View full abstract»

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  • Digital modulator permits the simultaneous transmission of three signals

    Publication Year: 1982, Page(s):140 - 142
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (827 KB)

    A digital modulator that permits the simultaneous transmission of three analog signals with one as a function of carrier amplitude, the second as a function of carrier frequency, and the third as a function of carrier phase is presented. The performance of a prototype modulator circuit compares favorably with expectations. View full abstract»

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  • Comments on the “analytical and experimental approaches for the design of low-distortion Wien bridge oscillators”

    Publication Year: 1982, Page(s):142 - 144
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (773 KB)

    After pointing out that the literature is full of RC networks misnamed as `Wien bridge', the author attempts to demonstrate that if the idea presented in the above paper (see Int. J. Circuit Theory Appl., vol.3, p.135-48, 1975) is applied to a true Wien bridge, an oscillator with inherently less distortion than the one experimented by Kaplan could result. View full abstract»

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  • Remarks on proposed structures of Wien bridge oscillators

    Publication Year: 1982, Page(s):144 - 145
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (756 KB)

    This communication deals mainly with two issues raised in a paper by Boutin (see ibid., vol.IM-31, no.2, p.142-4, June 1982). His first comment in his letter has criticized the title chosen for describing an oscillator proposed by the author recently. According to Boutin the oscillator has been wrongly entitled as a Wien bridge oscillator, in spite of the fact that it does not include a complete W... View full abstract»

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  • CORRESPONDENCE 
  • Correction to “a generalized method for de-embedding of multiport networks”

    Publication Year: 1982, Page(s): 145
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (388 KB)

    In the above-named short paper, Figs. 2 and 3 were inadvertently interchanged in the printing. Readers are advised to use the caption of Fig. 3 on p. 306 for the upper figure and of Fig. 2 for the lower figure. View full abstract»

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  • Contributors

    Publication Year: 1982, Page(s):146 - 149
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  • [Advertisements]

    Publication Year: 1982, Page(s):1 - 3
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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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SHERVIN SHIRMOHAMMADI
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