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Proceedings of the IEEE

Issue 7 • Date July 1968

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Displaying Results 1 - 25 of 58
  • [Front cover and table of contents]

    Publication Year: 1968, Page(s): c1
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1968, Page(s): 1147
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    Freely Available from IEEE
  • Large-capacity semiconductor memory

    Publication Year: 1968, Page(s):1148 - 1162
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2440 KB)

    Integrated-circuit memories using bipolar transistor technology are compared with memories based on various forms of the insulated-gate field-effect transistor (IGFET). A combination of p-channel IGFET memory cells with bipolar transistor access circuits appears to offer a desirable combination of characteristics. Memory organization, chip design, packaging, and interconnection alternatives are co... View full abstract»

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  • Dynamic scattering: A new electrooptic effect in certain classes of nematic liquid crystals

    Publication Year: 1968, Page(s):1162 - 1171
    Cited by:  Papers (35)  |  Patents (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1617 KB)

    A new electrooptic effect in certain classes of nematic liquid crystals is presented. The effect has been termed "dynamic scattering" because scattering centers are produced in the transparent, anisotropic medium due to the disruptive effects of ions in transit. The ions can be produced by field assisted dissociation of neutral molecules and/or Schottky emission processes. The rise times of 1 to 5... View full abstract»

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  • Exact equation for calculation of sheath proximity loss of single-conductor cables

    Publication Year: 1968, Page(s):1172 - 1181
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (639 KB)

    The sheath proximity loss of single-conductor cables is calculated by Miller's equation [1]. However, this equation involves a correction term which causes considerable error in calculated values for large-size, aluminum-sheathed cables. Taking the self-inductance of eddy current into account, the author has derived the exact equation. Miller's equation is no longer valid, especially for large-siz... View full abstract»

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  • A network description for antenna problems

    Publication Year: 1968, Page(s):1181 - 1193
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1143 KB)

    A complete network description for an antenna is realized via a modal decomposition of the electromagnetic fields surrounding the structure. The representation contains the transmitting, receiving, and radar scattering properties of the antenna. A scattering formulation permits the antenna's power gain, directivity, effective area, and radar cross section to be expressed as a functional on the ele... View full abstract»

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  • High-speed ultrasonic digital delay line design: A restatement of some basic considerations

    Publication Year: 1968, Page(s):1194 - 1202
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (808 KB)

    In the past, ultrasonic delay lines in digital storage applications tended to be designed for a maximum storage capacity compatible with losses in the delay medium in order to minimize the cost of access circuitry. This approach yielded capacities upward of 20 000 bits per delay line but necessitated complicated arrangements to fold up the relatively long delay path in an acceptable space. It also... View full abstract»

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  • Satellite VHF transponder time synchronization

    Publication Year: 1968, Page(s):1202 - 1206
    Cited by:  Papers (12)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (515 KB)

    This paper describes an experiment designed to transfer accurate time between two widely separated clocks using a VHF satellite transponder. The satellite used was the NASA Applications Technology Satellite, ATS-1. The experiment used atomic oscillators to maintain accurate time at each station, and the synchronization was accomplished by measuring the round-trip delay times between the stations. ... View full abstract»

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  • Coupled-mode description of a nonuniform transmission line

    Publication Year: 1968, Page(s):1209 - 1210
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (198 KB)

    Coupled-mode analysis provides a conceptually simple technique for the analysis of nonuniform transmission lines and nonuniform coupled systems. The variable series and shunt elements couple backward and forward traveling waves. Reflection coefficients are derived for an exponential and linear taper by this technique. View full abstract»

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  • Millimeter-wave generation with plasma devices: The state of the art

    Publication Year: 1968, Page(s):1210 - 1212
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    The electron beam-plasma interaction and the plasma multiplier have been investigated during the last decade in the hope that one or the other might have some application at millimeter wavelengths. So far the expectations for these devices have not been realized because of many unresolved engineering problems. Major difficulties are described here, and an attempt is made to evaluate the potential ... View full abstract»

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  • Copper-doped germanium detectors

    Publication Year: 1968, Page(s):1212 - 1213
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (230 KB)

    Background limited operation of copper-doped germanium detectors has been obtained for a background as low as 10-11watts (5 × 103photons/second) in the 8-12 µ region. The temperature dependence of the observed responsivity for detectors, each containing the same copper concentration but having different donor concentration does not agree with any of the usual theori... View full abstract»

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  • A new negative resistance of semiconductor bulk

    Publication Year: 1968, Page(s):1213 - 1215
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (222 KB)

    An analysis is presented of a new negative resistance that appears when the drift velocity of carriers exceeds the thermal velocity in the ordinary element semiconductor bulk. The theory may offer one explanation for a new current instability recently discovered [1]. View full abstract»

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  • Nanosecond-pulse generation at 11 GHz with Gunn-effect diodes

    Publication Year: 1968, Page(s):1215 - 1217
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (394 KB)

    With an injection signal of about -15 dB, Gunn oscillators generated microwave pulses at 11 GHz with a transient time of around 1 ns and an on-off ratio of more than 25 dB. Delay time and rise time of the modulated signal varied according to the injection level. View full abstract»

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  • High-power, microwave power combiner using a series-parallel array of diodes

    Publication Year: 1968, Page(s): 1217
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (121 KB)

    Successful operation of a series-parallel array of varactor diodes used as a high-power, microwave source is reported. This power combiner used twelve varactor diodes in a flowing liquid-dielectric bath and delivered 100 watts CW at 57-percent efficiency when operating as a doubler from 0.5 to 1.0 GHz. View full abstract»

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  • Contour imaging—A new type of imaging technique

    Publication Year: 1968, Page(s):1218 - 1219
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (488 KB)

    The experimental testing of a new type of imaging technique called contour imaging is described. It employs a single-pulse laser transmitter and a repetitively gated receiver, and can be used to create instant contour maps, to enhance image contrast, and to detect motion within a scene. The contour images may be viewed directly or recorded. View full abstract»

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  • Bounded fan-in, bounded fan-out uniform decompositions of synchronous sequential machines

    Publication Year: 1968, Page(s):1219 - 1220
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (224 KB)

    A general decomposition scheme is described which allows the realization of a given synchronous sequential machine as an interconnection of identical two-state modules. The bound on the fan-in and fan-out of each module is independent of the number of states in the given machine. View full abstract»

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  • Partial differentials of Marcum's Q function

    Publication Year: 1968, Page(s):1220 - 1221
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (177 KB)

    The partial derivatives of Marcum's Q function Q(a,b), with respect to a and b, are required for many communication system optimization problems. A simple derivation of the derivatives is given. View full abstract»

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  • Effect of uniform stress on Si p-n junctions

    Publication Year: 1968, Page(s):1221 - 1222
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (189 KB)

    A new method is described for produchrg large stress levels in semiconductor devices. The relative change in breakdown voltage induced by uniaxial stress σ was found to be (ΔV/VB)/σ≃-0.48 × 10-12, where stress is given in dynes/cm2. Experimental results are compared with the energy band model for the piezojunction effect. View full abstract»

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  • Thermal noise behavior of a thick depletion region avalanche photodetector

    Publication Year: 1968, Page(s):1222 - 1223
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (173 KB)

    An avalanche photodetector useful at both the 0.9 and 1.06 micron wavelengths is described. The detector performance is characterized to show its usefulness at elevated temperatures. View full abstract»

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  • Protective device for MOS integrated circuits

    Publication Year: 1968, Page(s):1223 - 1224
    Cited by:  Papers (2)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (153 KB)

    Two protective devices for MOS integrated circuits have been extensively tested and proved feasible. They also perform more reliably than conventional Zener diodes. One of them has been used in the fabrication of a dual 25-bit MOS and MNOS integrated shift register and performed reliably. View full abstract»

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  • New paradox in circuit theory

    Publication Year: 1968, Page(s): 1225
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (126 KB)

    An apparent violation of the second law of thermodynamics, involving a dc motor, was recently described (ibid., vol 54, pp. l200-1201, September 1966). Here we present a new paradox, involving a repulsion motor, rather than a dc motor. There solution of this new paradox will not bea s simple, because a nonzero torque is predicted even though the principle of equipartition is satisfied. View full abstract»

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  • Optical transversal filter

    Publication Year: 1968, Page(s):1225 - 1227
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (830 KB)

    An off-axis optical cavity has been successfully used as a transversal filter in the frequency domain. With a tap spacing of ∼40 nanoseconds, a square wave frequency response has provided alternating pass and rejection bands ∼12.5 MHz wide. View full abstract»

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  • A temperature-stable microwave cavity

    Publication Year: 1968, Page(s): 1227
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (263 KB)

    A stable cavity fabricated from fused silica is described in which the average stability is on the order of 2.2 parts it 108/°C from 25° to 63°C. View full abstract»

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  • Relaxation oscillations in avalanche diodes

    Publication Year: 1968, Page(s):1228 - 1229
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (207 KB)

    Continuous-wave relaxation oscillations have been observed in silicon p-n-n+diodes when driven into avalanche. The waveforms of the oscillations, varying from several KHz to over 800 MHz, are described. View full abstract»

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  • Energy and momentum transport velocities on transmission systems

    Publication Year: 1968, Page(s): 1228
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (112 KB)

    It has been noted in the literature that the power-energy relation for electromagnetic fields may be written in the form of a flow continuity equation, and thereby a velocity of electromagnetic energy flow may be defined. The force-momentum field relation may be used in the same way to define a velocity of momentum flow, and it is shown that the flow velocity for both momentum and energy is the gr... View full abstract»

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North Carolina State University