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Radio and Electronic Engineer

Issue 8 • Date August 1972

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Displaying Results 1 - 7 of 7
  • Framework for government research and development

    Publication Year: 1972
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (145 KB)

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  • Actively mode-locked transversely excited atmospheric (T.E.A.) CO2 laser

    Publication Year: 1972, Page(s):351 - 356
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1946 KB)

    A mode-locked CO2 laser with transverse pulse pumping has been developed which employs a Ge ultrasonic diffraction cell as an active loss modulator. This paper describes the initial stage of an effort to exploit the broad bandwidth (¿ 5 Ghz) of the CO2 laser transition and the high concentration of active gas at atmospheric pressure for generating ultra-short infra-red pulses at 10.6 ¿m waveleng... View full abstract»

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  • The organization of some solid-state stores

    Publication Year: 1972, Page(s):357 - 363
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (797 KB)

    A basic solid-state storage array is proposed which is capable of fast read- and write-times. special cases of this array are developed, one of which is analogous to a disk store and the other to a toroid on which the data paths can be either circular or helical. this represents a new concept: that of a cellular array without boundary cells. the characteristics of these stores and those of other c... View full abstract»

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  • Factors affecting the power stability of HCN lasers

    Publication Year: 1972, Page(s):364 - 368
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (865 KB)

    Laser stability must be defined in terms of the appropriate observation period, usually a second, an hour or a day, and the expected changes in the environment during that period. The relative importance of sources of instability of power output has been investigated and related to various designs of the HCN laser. The design of the NPL-GEC laser has been based on this investigation. View full abstract»

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  • Pyroelectric detector arrays for thermal imaging

    Publication Year: 1972, Page(s):369 - 372
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (795 KB)

    The pyroelectric detector is well established as a very effective single-element infra-red detector operating at room temperature. This paper describes the development of linear arrays of detectors in which the detector elements and much of the circuitry required for their operation are in the same microelectronic package. To eliminate the effects of voltage offset variations in the pre-amplifiers... View full abstract»

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  • The design of an audio-frequency active RC band-pass filter for a specific engineering requirement

    Publication Year: 1972, Page(s):373 - 380
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1364 KB)

    An engineering requirement for an audio-frequency band-pass filter can be met with an active RC filter which uses positive impedance convertors to simulate the inductors of an LC filter. Because of the low sensitivity of this type of realization, the component tolerances required are compatible with thick film technology. View full abstract»

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  • Measurement of varactor capacitance parameters

    Publication Year: 1972, Page(s):381 - 388
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (745 KB)

    A new technique is proposed for the determination of the parameters of the capacitance-voltage relationships of the p-n junction varactor. Special charts are used in conjunction with the measured values of varactor capacitance at five bias voltages. The determination of the Fourier capacitance coefficients of the pumped varactor is then discussed, another chart being used, in conjunction with the ... View full abstract»

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