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Proceedings of the IEEE

Issue 1 • Date Jan. 1979

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Displaying Results 1 - 25 of 37
  • [Front cover and table of contents]

    Publication Year: 1979, Page(s): c1
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    Freely Available from IEEE
  • Scanning the issue

    Publication Year: 1979, Page(s):3 - 5
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    Freely Available from IEEE
  • Miniaturized filters for channel translator units by means of LC-technology

    Publication Year: 1979, Page(s):6 - 16
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (933 KB)

    This paper presents methods for the design and the realization of high-quality miniaturized LC filters. The use of nonminimum phase networks in order to compensate delay, the implementation of tapped inductors as well as the application of miniaturized coils with improved material, new capacitor types and a new compression technique for the coil winding yield economical solutions with improved per... View full abstract»

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  • Compact bandpass filters using stepped impedance resonators

    Publication Year: 1979, Page(s):16 - 19
    Cited by:  Papers (44)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (323 KB)

    This paper presents a theoretical analysis of, and experimental results given by, stepped impedance (SI) resonators constructed and used as high-Q resonators in the UHF band. These results made it clear that the Q-factor is higher than conventional capacitor-loaded resonators. Three types of bandpass filters were designed and fabricated using the SI resonators. The filters mentioned in this paper ... View full abstract»

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  • Miniaturization of wide-band VHF filters by using spiral resonators

    Publication Year: 1979, Page(s):20 - 24
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (550 KB)

    The miniaturization of a wide-band VHF filter composed of distributed resonators has been studied. The miniaturized filter was realized with spiral resonant lines and lumped capacitors. The filter was designed using a prototype filter circuit composed of only series-resonant lumped-constant circuits. Each resonant circuit is transformed to another resonant circuit consisting of a spiral resonant l... View full abstract»

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  • A design philosophy for microelectronic active-RC filters

    Publication Year: 1979, Page(s):24 - 33
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1293 KB)

    A design philosophy for microelectronically realizable active-RC filters is presented and illustrated by means of microelectronic filter examples in the frequency range from approximately 75 Hz to about 110 kHz. The design is by simulation of low-sensitivity resistively terminated inductor-capacitor filters (LCR filters). Based on an analysis of the effect of nonideal components in the active-RC f... View full abstract»

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  • Miniaturized thick-film RC-active filters for PCM application

    Publication Year: 1979, Page(s):34 - 37
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (381 KB)

    This paper presents thick-film RC-active filters developed for use in pulse-code modulation (PCM) systems. Filters for PCM telephone transmission systems are required to be small in size and low cost in production, and they must have good performance. The filters presented have a twelve-lead single in-line package configuration. Dimensions are 5-mm thick, 10-mm high, and 30-mm wide. They meet the ... View full abstract»

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  • RC-active filters in single-layer tantalum RC-film technology

    Publication Year: 1979, Page(s):37 - 42
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (726 KB)

    A new composition of reactively sputtered Ta-oxinitride is used as a basic material for thin-film resistors as well as for thin-film capacitors; this single-layer technique enables an economic fabrication process for integrated RC circuits with lumped or distributed RC components. A bandpass circuit with lumped components for a dialing tone receiver and a voiceband low pass with distributed elemen... View full abstract»

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  • Miniature programmable transversal filter using CCD/MOS technology

    Publication Year: 1979, Page(s):42 - 50
    Cited by:  Papers (29)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1414 KB)

    This paper describes the operational features and performance of an integrated-circuit programmable sampled-analog data filter in transversal form using CCD/MOST technology. Reasons behind the particular choice of filter architecture for a prototype realization and its comparison with other reported designs in this technology are discussed, with particular emphasis placed on a novel MOST multiplie... View full abstract»

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  • Charge-coupled device pseudo-noise matched filter design

    Publication Year: 1979, Page(s):50 - 60
    Cited by:  Papers (19)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (973 KB)

    The design and fabrication of practicable CCD IC's as pseudo-noise matched filters (PNMF's) for direct-sequence spread-spectrum signals is described. After a brief explanation of CCD PNMF's, desirable architectural features for an IC are presented. A state-of-the-art fully integrated 512-cell CCD PNMF is used as an example. Next, PNMF design considerations dealing with device limitations, sampling... View full abstract»

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  • MOS switched-capacitor filters

    Publication Year: 1979, Page(s):61 - 75
    Cited by:  Papers (140)  |  Patents (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1745 KB)

    In the past several years, much progress has been made in bringing the economies of integrated-circuit technology to bear on the realization of voiceband frequency selective filters. This paper will review one approach to this problem, the use of switched-capacitor techniques. The paper emphasizes the practical aspects of switched-capacitor filter design under the constraints imposed by MOS integr... View full abstract»

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  • Crystal, ceramic, and mechanical filters in Japan

    Publication Year: 1979, Page(s):75 - 102
    Cited by:  Papers (6)  |  Patents (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3487 KB)

    In Japan, there has been considerable activity in the research and manufacturing of quartz crystal filters, ceramic filters and mechanical filters. This paper reviews some of these contributions. An emphasis is placed on filters actually used. First multiple-mode resonators are reviewed; this concept having had profound effects on all types of filters. Quartz-crystal filters as well as other cryst... View full abstract»

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  • Mechanical channel filters meeting CCITT specification

    Publication Year: 1979, Page(s):102 - 108
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1071 KB)

    The paper elucidates the important role played by mechanical filters in modern carrier frequency communications systems. Mechanical filters offer the benefits of small volume, high Q, high stability, and low manufacturing cost. The design of mechanical filters is based upon the close analogy between electrical quantities and mechanical quantities. It is shown how the filter design takes account of... View full abstract»

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  • The evolution of the discrete crystal single-sideband selection filter in the bell system

    Publication Year: 1979, Page(s):109 - 115
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1339 KB)

    The Bell System in its long-distance frequency division multiplex systems has traditionally used crystal single sideband selection filters in the basic 12-channel modulation process. This paper reviews the changes this type of channel filter has undergone over its 40 year history. Special emphasis is given to the physical and electrical design and the characteristics of the most recent version of ... View full abstract»

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  • A 128-kHz mechanical channel filter with finite-frequency attenuation poles

    Publication Year: 1979, Page(s):115 - 119
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (581 KB)

    The paper describes the design and manufacture of a miniaturized 128-kHz pole-type mechanical channel filter for FDM communication systems. By introducing a new phase inversion structure to realize the finite attenuation poles, and by minimizing sensitivity in the circuit design, we have designed and manufactured a miniaturized high-performance mechanical channel filter. The filter volume is 10.7 ... View full abstract»

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  • Some recent advances in integrated crystal filters

    Publication Year: 1979, Page(s):119 - 129
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (909 KB)

    Integrated crystal filters-monolithic, tandem monolithic, and hybrid monolithic (polylithic) quartz crystal filters-are widely used in HF, VHF, UHF, and satellite communications equipments, in both commercial and military, in telephone FDM equipment, and in a number of other applications including frequency synthesizers and airborne navigation aids. Frequencies range from 5 to 180 MHz and occasion... View full abstract»

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  • Miniature surface-acoustic-wave filters

    Publication Year: 1979, Page(s):129 - 146
    Cited by:  Papers (25)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1883 KB)

    An introduction to Surface-Acoustic-Wave (SAW) devices-their operation, advantages, and applications--is presented. The process of design and realization of high-performance SAW filters is examined from initial specifications to final device operation. Several techniques drawn from a variety of disciplines illustrate the implementation of finite impulse response SAW frequency functions. Material p... View full abstract»

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  • Surface-acoustic-wave resonator filters

    Publication Year: 1979, Page(s):147 - 158
    Cited by:  Papers (19)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1626 KB)

    This paper presents an overview of surface-acoustic-wave (SAW) resonator filter technology. Given the current state of the art, these filters promise reproducible low-loss (≲6 dB) narrow-bandwidth (500 ≲ f/Δf ≲ 50 000) responses in the VHF and UHF ranges. Devices that contain one or a number of sections, each consisting of a resonant cavity between two grating reflectors and... View full abstract»

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  • Miniature low-pass EMI filters

    Publication Year: 1979, Page(s):159 - 163
    Cited by:  Papers (7)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (550 KB)

    This paper describes miniature ceramic feedthru type electromagnetic interference (EMI) filters. Electrically, the devices function as low-pass filters with a 3-dB cutoff frequency in the low-megahertz range. The filters are mechanically rugged and in many applications can be placed in the I/O connector or substituted for the existing feedthrus. The monolithic distributed filter covered in the pap... View full abstract»

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  • Resonance of a wire antenna near the lower hybrid frequency in an RF-generated magnetoplasma

    Publication Year: 1979, Page(s):170 - 171
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (199 KB)

    The lower hybrid resonance (LHR) of a wire antenna immersed in an RF-generated laboratory plasma was observed with a frequency sweeping admittance bridge. It is shown that the resonance frequency observed in the experiment agrees with the LHR frequency calculated from an ion density and a static magnetic field intensity. View full abstract»

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  • Mapping theory of two-dimensional anisotropic regions

    Publication Year: 1979, Page(s):171 - 172
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (185 KB)

    Mapping between two-dimensional anisotropic regions with different permittivity tensors is proposed. Conformal mapping is a particular case of this mapping in which potential and energy are invariant. This mapping leads us to "isotropy-izing" of an anisotropic region, and two examples of that are shown. View full abstract»

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  • Linear phase variable digital bandpass filters

    Publication Year: 1979, Page(s):173 - 174
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (209 KB)

    A transformation for obtaining a linear phase variable cut-off low-pass digital filter has been recently described in the literature [1]. In this letter, this transformation is worked out for the case of linear phase bandpass digital filters with variable bandwidth and center frequency. View full abstract»

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  • A new approximation of the discrete hilbert transformer

    Publication Year: 1979, Page(s):174 - 175
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (183 KB)

    A class of discrete Hilbert transformers (DHT) is presented, which requires less coefficient storage as compared to the optimal DHT, and whose performance is only slightly inferior to the optimal DHT. In respect to coefficient quantization error, the new DHT is found to be as good as, if not better, than the optimal one, especially for small word-lengths. View full abstract»

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  • Discrete solitons by the bilinear transformation

    Publication Year: 1979, Page(s):175 - 176
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (203 KB)

    A discrete-time sine-Gordon equation is obtained by applying the bilinear transformation to the inverse scattering representation of the sine-Gordon equation. The corresponding discrete soliton solutions and Bäcklund transformations are presented. View full abstract»

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  • Large-signal analysis of semiconductor circuits with multifrequency excitation

    Publication Year: 1979, Page(s):177 - 178
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    A nonlinear device characterized by a noninteger power-law equation is considered. Amplitudes and phases of output harmonic and mixing components are determined for the case where the device is driven by several arbitrarily phased frequency components. The resulting expressions are shown to have close ties with the Gaussian hypergeometric function. View full abstract»

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H. Joel Trussell
North Carolina State University