IEEE Transactions on Circuits and Systems

Volume 30 Issue 1 • January 1983

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Displaying Results 1 - 10 of 10
  • Noise analysis of switched capacitor networks

    Publication Year: 1983, Page(s):37 - 43
    Cited by:  Papers (72)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (799 KB)

    Noise generated in switched capacitor (SC) networks has its origin in the thermal fluctuations of charged particles in the channels of the MOS switch transistors on one hand, in the operational amplifiers on the other hand. Using a SC integrator as vehicle, it is shown that the output noise spectrum consists in general of a broad-band component due to a continuous-time noise signal and of a narrow... View full abstract»

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  • Analysis of switched-capacitor networks using general- purpose circuit simulation programs

    Publication Year: 1983, Page(s):43 - 48
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (673 KB)

    This paper presents a method for the analysis of switched-capacitor (SC) networks in the frequency and time domains by the use of general-purpose circuit simulation programs such as SPICE. It is shown how thez-domain equivalent circuit can be modeled exactly in the continuous-time domain using the lossless transmission line element of the simulation program to implement the required one... View full abstract»

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  • A note on the design of broad-band impedance matching networks

    Publication Year: 1983, Page(s):51 - 54
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (414 KB)

    Formulas are given which are intended to assist in the design of simple low-pass networks to match a resistive source to a complex load impedance when the desired type of frequency response does not coincide with one for which explicit formulas for the element values have been published to date. Third-order elliptic is one such response, and its adoption in a matching network allows some compromis... View full abstract»

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  • An RC op amp chaos generator

    Publication Year: 1983, Page(s):54 - 56
    Cited by:  Papers (38)  |  Patents (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (313 KB)

    AnRCop amp chaos generator is presented with experimental results showing the practicality and convenience of the system. The circuit is achieved by inserting dynamics on a nondynamic semistate variable of a second-order bent hysteresis Lienard system, the idea stemming from observations of Shinriki et al. View full abstract»

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  • Designing active RC biquads with improved performance

    Publication Year: 1983, Page(s):56 - 57
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (221 KB)

    It is shown that multiamplifier-activeRCbiquads of significantly better performance than that of known filters can be obtained by using composite amplifiers whose frequency dependence is tailored to the specific filter requirements rather than being designed for the usual criteria, such as maximum bandwidth or minimum phase shift. View full abstract»

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  • On the Walach - Zeheb multivariable positivity test

    Publication Year: 1983, Page(s):1 - 5
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    In a recent article in this TRANSACTIONS Walach and Zeheb presented a test for the positivity of real multivariable polynomials on rectangular domains. While the basic idea of the Walach-Zeheb test is sound and potentially useful, the case of unbounded domains is in need of reexamination, and, what is more important, the restriction to rectangular domains can be dispensed with entirely. Using the ... View full abstract»

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  • Improved GIC digital filter structures

    Publication Year: 1983, Page(s):49 - 51
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (272 KB)

    A procedure is proposed which leads to a reduction in the number of adders in a class of digital filter structures based on the generalized-immittance converter (GIC). This is then used to obtain more economical GIC structures. For example, a second-order digital equalizer is obtained which requires only two unit delays, two multipliers, and six adders. Further, it is shown that the improvements a... View full abstract»

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  • Synthesis and implementation of recursive linear shift-variant digital filters

    Publication Year: 1983, Page(s):29 - 36
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (936 KB)

    In this paper, problems associated with the synthesis and implementation of recursive linear shift-variant digital filters are investigated. We propose two techniques to approximate a given impulse response as a degenerate sequence that is realizable as a recursive difference equation. Both techniques use a least squares error criterion to minimize the difference between the given and the approxim... View full abstract»

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  • Frequency-domain adaptive filtering using continuous transfer functions

    Publication Year: 1983, Page(s):5 - 15
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1200 KB)

    A continuous-time frequency-domain adaptive filtering approach is described. The adaptive filter is required to allow independent control of its transfer function coefficients. A sequential-linear-search (SLS) adaptation algorithm is presented and its convergence properties are investigated. It is shown analytically that the algorithm converges to a global solution with respect to the numerator co... View full abstract»

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  • The double matching problem: Analytic and real frequency solutions

    Publication Year: 1983, Page(s):15 - 28
    Cited by:  Papers (101)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1544 KB)

    A new and simplified analytic solution is given for the double matching problem. That problem requires the matching of a complex generator impedance to a complex load over a frequency band. The analytic solution is fundamental to understanding theoretical gain-bandwidth performance of systems but introduces severe difficulties when employed in design practice. Following the analytic presentation a... View full abstract»

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