IEEE Transactions on Circuits and Systems

Issue 12 • Dec. 1990

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Displaying Results 1 - 20 of 20
  • Comments on "Design of a class of time-constrained FIR digital filters by successive projections

    Publication Year: 1990
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (123 KB)

    For the original article see ibid., vol.36, no.1, p.164-7 (1989). The commenter suggests a more generalized approach to the design problem of a class of time-constrained FIR digital filters reported by S.-C. Pei and I.-I. Yang.<> View full abstract»

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  • Comments on "A parallel A/D converter array structure with common reference processing unit

    Publication Year: 1990
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (123 KB)

    For the original article see ibid., vol.36, no.8, p.1116-19 (1989). In their paper K. Chen and C. Svensson described a successive approximation technique for an A/D convertor array. The commenters claim that the basic structure of this technique had previously been proposed by them (see Proc. IEEE Int. Symp. Circuits Syst., p.1286-9, May 1986). Also, while the approach is insensitive to the capaci... View full abstract»

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  • Sinusoidal and pulse responses of FIR-median hybrid filters

    Publication Year: 1990, Page(s):1552 - 1556
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    Amplitude and phase responses of several types of FIR-median hybrid (FMH) filters are analyzed using sinusoids and rectangular pulses as input signals. It is shown that the linear substructures used in FMH filters limit the overall filter to behave like a lowpass filter, as opposed to the standard median (SM) filter which has some spurious high-gain areas in the otherwise attenuated frequency rang... View full abstract»

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  • Sensitivity properties of SC filters derived from LC ladder prototypes

    Publication Year: 1990, Page(s):1544 - 1546
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (216 KB)

    The sensitivity properties of a class of switched-capacitor LDI ladder filter are investigated. It is shown that, because of the frequency variation of the termination in the equivalent circuit of such filters, the passband sensitivity property of the LC prototype filter is not retained. It is shown how the introduction of an extra switched capacitor at the input can result in lower passband sensi... View full abstract»

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  • Design of discrete-coefficient-value linear phase FIR filters with optimum normalized peak ripple magnitude

    Publication Year: 1990, Page(s):1480 - 1486
    Cited by:  Papers (128)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    Four methods are presented for optimizing filters in the normalized peak ripple magnitude (NPRM) sense. Two of the methods being to the passband gain sectioning technique. The other two methods make use of the objective function f=δ-αb. Several heuristic methods for determining α are also presented. The NPRM is an important performance measure; the absolute peak... View full abstract»

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  • Extrapolated impulse response FIR filters

    Publication Year: 1990, Page(s):1548 - 1551
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    An FIR filter structure with reduced hardware complexity is presented. It makes use of the quasi-periodic nature of the impulse response samples of low-pass and high-pass filters to extrapolate the filter length. Because of the reduced number of multipliers, it has lower roundoff noise power compared to the direct-form structure. In this technique, one period of the impulse response is realized ac... View full abstract»

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  • Fault modeling of physical failures in CMOS VLSI circuits

    Publication Year: 1990, Page(s):1528 - 1543
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1032 KB)

    The analog complex physical fault of a gate-to-drain short in VLSI CMOS circuits is studied. A relationship between the inverse voltage of an inverter and the faulty voltage output is obtained and is then used to study the propagation of the faulty signal through successive gates. General graphical rules are developed which describe techniques for obtaining the operating point of the circuit throu... View full abstract»

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  • State models and stability for 2-D filters

    Publication Year: 1990, Page(s):1509 - 1519
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (612 KB)

    A generalized 2-D discrete-time filter is considered. Using the concept of a wave advance process, the filter equation is converted to a 1-D recursive form. A 1-D state equation is then developed and a canonical form for the state equation is presented. A norm bound on state transitions is developed, which is then related to the coefficients of the underlying filter equation. The norm bound is use... View full abstract»

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  • A pole sharing technique for linear phase switched-capacitor filter banks

    Publication Year: 1990, Page(s):1465 - 1479
    Cited by:  Papers (9)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (964 KB)

    A pole-sharing technique was used for implementing bandpass filter banks using the nonminimum-phase Lerner approximation without placing additional speed requirements on the operational amplifiers and without resorting to complicated clocking strategies; only a biphasic clock was used. Substantial hardware saving has been achieved. The filter synthesis is shown to be micropower-compatible and para... View full abstract»

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  • On the Markov stability criterion for discrete systems

    Publication Year: 1990, Page(s):1576 - 1578
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    It is shown that the Markov stability criterion for discrete systems developed by H. Nour-Eldin (1971) can be simplified for n even, to a positivity test of the Hankel matrix S of low dimension m=n/2, and to a positivity test of certain linear combinations of the coefficients obtained through bilinear transformation. For n odd, the polynomial zf View full abstract»

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  • Theoretical analysis of the loop-gain modulator

    Publication Year: 1990, Page(s):1556 - 1559
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    A recently introduced concept in amplitude modulation circuits is based on the modulation of the loop gain of a sinusoidal feedback oscillator. A model for the loop-gain modulator is proposed and discussed. The linearity of modulation for either the class-A or class-C stage is excellent for modulation indexes that approach unity. This linearity is comparable to that of the collector modulation cir... View full abstract»

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  • The analytic signal in the Hartley transform domain

    Publication Year: 1990, Page(s):1546 - 1548
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    An analytic signal in the Hartley transform domain is presented. It operates entirely in the real domain, and has many properties similar to the Fourier analytic signal; also, many efficient existing fast Hartley algorithms can be used to reduce computation complexity. The discrete Hartley analytic signals and the Hartley spectra associated with two real signals are presented. The results correspo... View full abstract»

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  • Optimal finite precision implementation of a state-estimate feedback controller

    Publication Year: 1990, Page(s):1487 - 1498
    Cited by:  Papers (36)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (840 KB)

    Expressions are derived for the sensitivity and the roundoff noise gain of the closed-loop transfer function of a system when the state estimate feedback controller is implemented with a finite word length and when the computations are performed in finite precision. This allows one to compare the sensitivity and noise gain over all equivalent state-variable implementations of the observer plus con... View full abstract»

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  • Stability of a class of nonreciprocal cellular neural networks

    Publication Year: 1990, Page(s):1520 - 1527
    Cited by:  Papers (155)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    Cellular neural networks with an appropriate choice of templates can solve, among other things, local and global pattern recognition problems. The complete stability of these networks has been proved earlier for the symmetric (reciprocal) cases where the feedback values between the different cells within a neighborhood are the same in both directions. It is shown that at least for some interesting... View full abstract»

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  • A discrete Fourier transform using switched capacitor circuits in systolic array architecture

    Publication Year: 1990, Page(s):1578 - 1580
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (176 KB)

    Basic SC building blocks are introduced and interconnection of these blocks in a systolic array architecture is shown to yield the desired DFT components. Simulation results using implementation on a workstation and SWITCAP program are reported View full abstract»

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  • An improved correlated double sampling circuit for low noise charge coupled devices

    Publication Year: 1990, Page(s):1559 - 1565
    Cited by:  Papers (27)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (504 KB)

    Correlated double sampling (CDS) is discussed as a signal processing method to reduce low-frequency amplifier noise and kTC noise of sampled systems. The different noise contributions in a typical CCD output stage and their transformation through a CDS circuit are discussed. An improved CDS method (CDS2) is presented that completely eliminates the pixel crosstalk and kTC-noise contribution, but ma... View full abstract»

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  • Synthesis of 2-D linear phase digital filters

    Publication Year: 1990, Page(s):1499 - 1508
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (756 KB)

    The synthesis of two-dimensional (2-D) linear-phase digital filters is studied in terms of approximation of 2-D transfer functions. A convergence result is established for the approximation of nonrational 2-D transfer functions under a certain mild frequency domain condition. It is shown that the synthesis of 2-D linear-phase FIR (finite impulse response) digital filters can be transformed into an... View full abstract»

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  • Least squares inverse polynomials and a proof of practical BIBO stability of n-D digital filters

    Publication Year: 1990, Page(s):1565 - 1567
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (284 KB)

    The problem of stabilizing unstable n-dimensional practical digital filters is discussed, where only one of the independent variables of the n-D signal is temporal and the other variables are spatial. The double-least-squares inverse method is used to stabilize such practical filters. It is proved that the least-squares inverse of the denominator polynomial of a practical n <... View full abstract»

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  • A switched capacitor bidirectional associative memory

    Publication Year: 1990, Page(s):1568 - 1572
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB)

    A bidirectional associative memory using switched-capacitor (SC) filter techniques (SCBAM) is introduced and verified experimentally. The discrete-time equation that characterizes SC filter design is shown to be applicable in recalling m stored vector pairs that can be encoded in a correlation matrix M. The elements of M (and MT) are represented by th... View full abstract»

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  • Strict aperiodic property of a polynomial set with coefficients on a diamond and generalizations

    Publication Year: 1990, Page(s):1572 - 1575
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    Simple necessary and sufficient conditions are derived for a polynomial set with coefficients in a diamond to be strictly aperiodic. A procedure for obtaining the maximal diamond containing only the coefficients of strictly aperiodic polynomials is also given. The results and procedure are shown to be applicable to a wider class of regions in parameter space View full abstract»

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