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IEEE Transactions on Circuits and Systems

Issue 11 • November 1986

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Displaying Results 1 - 13 of 13
  • Comments on "On the Implementation of Fully Differential Switched-Capacitor Ladder Filters

    Publication Year: 1986, Page(s): 1152
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (104 KB)

    This letter is aimed at resolving an apparent contradiction regarding the preferred double integrator loop structure for high-frequency, fully-differential, switched-capacitor filters. View full abstract»

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  • On the necessary conditions for the BIBO stability of N- D filters

    Publication Year: 1986, Page(s): 1143
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (144 KB)

    In this letter, it is shown that a G with a relatively prime numerator and denominator has no poles in \overline {U}^n implies that it has no second kind singularities in TU^{n-1} . An alternate necessary condition in terms of discrete principal Hurwitz polynomials is also stated. View full abstract»

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  • Transfer functions for switched-capacitor and wave digital filters

    Publication Year: 1986, Page(s):1138 - 1142
    Cited by:  Papers (1)  |  Patents (102)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    Closed-form expressions are presented for amplitude-oriented low-pass, high-pass, and bandpass sampled-data transfer functions suitable for realization as 1) switched-capacitor lossless discrete integrator (LDI) ladder filters, or 2) wave digital filters. Other types of realizations are also possible, such as those employing voltage inverter switches (VIS's), the recently introduced switched-capac... View full abstract»

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  • Analytic design of optimal FIR narrow-band filters using Zolotarev polynomials

    Publication Year: 1986, Page(s):1065 - 1071
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    An analytic method for designing narrow-band FIR filters using Zolotarev polynomials, which are extensions of Chebyshev polynomials, is proposed. These filters are optimal in the Chebyshev sense. Bandpass and bandstop narrow-band filters, as well as low-pass and high-pass filters, can be designed by this method. The design procedure and related formulas are presented. Design examples are included ... View full abstract»

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  • A high-frequency CMOS linear transconductance element

    Publication Year: 1986, Page(s):1132 - 1138
    Cited by:  Papers (62)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (792 KB)

    A simple four-transistor, linear, tunable, high-frequency transconductance element is described. By using a pair of composite n -channel- p -channel devices, the circuit achieves its linearity by current differencing without undue matching requirements. It is shown that linearity and frequency response can be optimized simu... View full abstract»

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  • Passive cascaded-lattice structures for low-sensitivity FIR filter design, with applications to filter banks

    Publication Year: 1986, Page(s):1045 - 1064
    Cited by:  Papers (52)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2040 KB)

    A class of nonrecursive cascaded-lattice structures is derived, for the implementation of finite-impulse response (FIR) digital filters. The building blocks are lossless and the transfer function can be implemented as a sequence of planar rotations. The structures can be used for the synthesis of any scalar FIR transfer function H(z) with no restriction on th... View full abstract»

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  • Hyper chaos: Laboratory experiment and numerical confirmation

    Publication Year: 1986, Page(s):1143 - 1147
    Cited by:  Papers (188)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    Hyperchaos has been observed, for the first time, from a real physical system: a very simple fourth-order electrical circuit. It is autonomous and reciprocal and has only one nonlinear element, a three-segment piecewise-linear resistor. Because of the circuit's simplicity, the laboratory measurements have been confirmed by digital computer simulations. The hyperchaotic nature is confirmed by the t... View full abstract»

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  • The double scroll family

    Publication Year: 1986, Page(s):1072 - 1118
    Cited by:  Papers (514)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (5088 KB)

    This paper provides a rigorous mathematical proof that the double scroll is indeed chaotic. Our approach is to derive a linearly equivalent class of piecewise-linear differential equations which includes the double scroll as a special case. A necessary and sufficient condition for two such piecewise-linear vector fields to be linearly equivalent is that their respective eigenvalues be a scaled ver... View full abstract»

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  • Pole sensitivity to network component change

    Publication Year: 1986, Page(s):1128 - 1132
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    Response function pole sensitivity to network components is developed using large change matrix modification. The resulting formulas explicitly show the component dependence, and are particularly useful for circuits having dominant or nearly dominant poles. Standard root finders and linear equation solvers are required to evaluate the formulas. The method is applied to a linearized active analog c... View full abstract»

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  • An extension of Elmore's delay

    Publication Year: 1986, Page(s):1147 - 1149
    Cited by:  Papers (13)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (392 KB)

    This work extends the notion of delay defined by Elmore [3] to accommodate the effect of non-unit-step (slow) excitations. A single value of delay for any node in an RC network is derived by using a state-space model. This model provides a compact delay expression in closed-form. It also handles multiple sources of excitation, and we show that delay estimation for slow excitations is no harder tha... View full abstract»

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  • A switched differential op-amp with low offset and reduced 1/f noise

    Publication Year: 1986, Page(s):1119 - 1127
    Cited by:  Papers (6)  |  Patents (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1176 KB)

    Fully differential techniques are becoming a popular method to alleviate the problem of low dynamic range in an analog VLSI environment. Low-frequency (1/f) noise contributions and input offset voltage remain, however, as two inherent difficulties in MOS analog designs. In this paper, a dynamic technique for implementing low-noise low-offset differential op-... View full abstract»

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  • An extension of Elmore's delay and its application for timing analysis of MOS pass transistor networks

    Publication Year: 1986, Page(s):1149 - 1152
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    This work extends the notion of delay defined by Elmore [2] to accommodate the effect of non-unit-step (slow) excitations for MOS pass networks. Following Horowitz [3], each pass transistor in a pass network is modeled as a nonlinear device. A single value of delay for each node in a pass network is then derived by performing a state-space ana on the network model. This approach offers a provision... View full abstract»

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  • An improved lower bound on the max flow of postoutage network configurations

    Publication Year: 1986, Page(s):1153 - 1154
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (208 KB)

    An improved lower bound is derived for the maximal flow of networks subject to edge failures. The bound is obtained by computing the max flow of a selected subnetwork around an edge that fails; hence, solution of the entire network can be avoided. The result is useful for the vulnerability analysis of flow networks. View full abstract»

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