IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications

Issue 9 • Sept. 2000

Filter Results

Displaying Results 1 - 22 of 22
  • True worst-case circuit tolerance analysis using genetic algorithms and affine arithmetic

    Publication Year: 2000, Page(s):1285 - 1296
    Cited by:  Papers (34)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (286 KB)

    In this paper, a new approach to the calculation of the true worst case in circuit tolerance analysis (TWC-CTA) with parameters characterized by large uncertainties is presented. It is based on the joint use of genetic algorithms (GAs) and affine arithmetic (AA). The GAs are used to minimize the underestimation error which affects stochastic methods while the AA is applied to minimize the overesti... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Sliding-mode control of interleaved boost converters

    Publication Year: 2000, Page(s):1330 - 1339
    Cited by:  Papers (55)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    Boost topologies in interleaved operation under sliding-mode control are analyzed in this paper. First, the interleaving connection of two identical boost converters results in a new step-up structure whose closed-loop dynamics are asymptotically stable with good start-up and excellent load regulation when a self-oscillating sliding-mode control is applied to the converter. For a duty cycle of 50%... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Synchronization with message embedded for generalized Lorenz chaotic circuits and its error analysis

    Publication Year: 2000, Page(s):1418 - 1424
    Cited by:  Papers (23)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    The main concern in this brief is how to design a better receiver structure and its synchronization error analysis. By exploiting a skew-symmetric type property existing in generalized Lorenz chaotic systems, we propose a novel receiver design for synchronizing the transmitter-receiver pair. Error analysis carried out by the Lyapunov direct method explicitly shows the relation among the magnitudes... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Performance evaluation of adiabatic gates

    Publication Year: 2000, Page(s):1297 - 1308
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (292 KB)

    In this paper, buffer and NAND-NOR adiabatic gates are compared to a gate designed with the traditional complementary metal-oxide-semiconductor (CMOS) approach. The comparison is carried out assuming both an assigned power supply and by setting its value in such a way as to minimize power consumption. General relationships, which are independent of process parameters, as well as being simple enoug... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • N-dimensional uniform probability distribution in nonlinear autoregressive filter structures

    Publication Year: 2000, Page(s):1413 - 1417
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    In this brief, we consider a class of nonlinear discrete-time systems and prove conditions for the generation of signals with n-dimensional uniform probability distribution. To obtain this result we prove the invariance of the Frobenius-Perron-Operator on a finite-dimensional function space. Spectral properties of the generated signal, as well as the influence of an input signal on the signal char... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • An improved residue-to-binary converter

    Publication Year: 2000, Page(s):1437 - 1440
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (140 KB)

    An efficient algorithm, which converts residue numbers, module (2n+1, 2n, 2n-1), into an equivalent binary number, is proposed; the algorithm improves on a previously published technique. A novel hardware implementation is also discussed. In comparison with two previously published converters, the proposed converter provides at least a 40% hardware saving and a 45%... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Limits to the fluctuation-dissipation theorem for nonlinear circuits

    Publication Year: 2000, Page(s):1323 - 1329
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    It is well known that the equilibrium thermal noise behavior at the terminals of any linear time-invariant (LTI) RLC circuit can be predicted from knowledge of the driving-point impedance and temperature alone. This paper examines the conjecture that similar results hold if the capacitors and inductors are nonlinear. We refine the conjecture by analyzing the behavior of an RLC bridge circuit with ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Transfer function of current modulator in PWM converters with current-mode control

    Publication Year: 2000, Page(s):1407 - 1412
    Cited by:  Papers (58)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    Several different expressions have been derived in previous publications for the transfer function of the current modulator used in pulsewidth modulated (PWM) dc-dc power converters with current-mode control. These expressions give results higher than the measured ones and exhibit many other problems, e.g., one expression gives an infinite value when no slope compensation is used. This paper prese... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Two-port equivalences for bandpass filters

    Publication Year: 2000, Page(s):1431 - 1437
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    This brief describes a set of equivalences to be used to implement one or two finite transmission zeros in a bandpass [inductance-capacitance (LC) or microwave] filter in the form of three or four grounded resonators with multiple coupling branches. A generalization of the Norton (impedance) transformation is also described for circuits that contain multiple coupling branches. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A constructive algorithm for 2-D spectral factorization with rational spectral factors

    Publication Year: 2000, Page(s):1309 - 1318
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    Spectral factorization of para-Hermitian polynomial matrices nonnegative on the imaginary axis is known to play a crucial role in signal and system theory. Such factorization, although always feasible in one-dimensional (1-D) case, can be carried out in two-dimensional (2-D) case in a somewhat modified form. In this modified form, even spectral factors of scalar polynomials must be rational matric... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A continuity proof of Rudin's theorem for polynomials and a generalization

    Publication Year: 2000, Page(s):1319 - 1322
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (132 KB)

    We assign to each nonzero complex polynomial the minimum of the absolute values of its roots. We show the simple principle that this minimum depends continuously on the coefficients of the polynomial and is sufficiently powerful to give a very elementary proof of Rudin's stability theorem for multivariable polynomials. Moreover, we show that the polynomial version of a generalization on Rudin's th... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Harmonic analysis of PWM converters

    Publication Year: 2000, Page(s):1340 - 1349
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (256 KB)

    A nonlinear vector differential equation of periodically time-variant system is applied to the harmonic analysis of pulsewidth modulation (PWM) converters. The differential equation is solved by a combination of harmonic balance and small parameter methods. This results in an equivalent system of algebraic equations from which a steady-state solution required for the harmonic analysis is obtained.... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Short-circuit energy dissipation modeling for submicrometer CMOS gates

    Publication Year: 2000, Page(s):1350 - 1361
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB)

    A significant part of the energy dissipation in static complementary metal-oxide-semiconductor (CMOS) structures is due to short-circuit currents. In this paper, an accurate analytical model for the CMOS short-circuit energy dissipation is presented. First, the short-circuit energy dissipation of the CMOS inverter is modeled. The derived model is based on analytical expressions of the inverter out... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • AZKA cell, the current-mode alternative of Wheatstone bridge

    Publication Year: 2000, Page(s):1277 - 1284
    Cited by:  Papers (20)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (128 KB)

    This paper describes a new circuit topology based on duality of the well known voltage-mode Wheatstone bridge. This topology can implement ratiometric current measurement which is a vital aspect of current-mode instrumentation and signal processing. The theory of the proposed circuit is developed and its advantages and limitations are discussed. The new circuit (called AZKA cell) may be thought of... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Signal transition time effect on CMOS delay evaluation

    Publication Year: 2000, Page(s):1362 - 1369
    Cited by:  Papers (16)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (156 KB)

    Realistic modeling of gate delay is of great importance in evaluating circuit path performances. Nonzero signal rise and fall times contribute to gate propagation delays and must be considered for realistic characterization of standard cells. In this paper, we present an accurate and simple method to model output rise and fall times. We show that this can be obtained in a framework of a more gener... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Minimal positive realizations of transfer functions with positive real poles

    Publication Year: 2000, Page(s):1370 - 1377
    Cited by:  Papers (29)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (220 KB)

    A standard result of linear-system theory states that a SISO rational nth-order transfer function always has an nth-order realization. In some applications, one is interested in having a realization with nonnegative entries (i.e., a positive system) and it is known that a positive system may not be minimal in the usual sense. In this paper, we give an explicit necessary and sufficient condition fo... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Analog cellular networks for multisensor fusion and control

    Publication Year: 2000, Page(s):1378 - 1382
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (160 KB)

    Analog modular architectures, derived from the computational paradigm of state-controlled cellular neural networks (SC-CNNs), are considered in this brief to process signals gathered from a distributed set of sensors. A novel design methodology for choosing the "local" system parameters so as to obtain the desired "global" signal processing function is proposed together with some theoretical resul... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Development of a switched-capacitor DC-DC converter with bidirectional power flow

    Publication Year: 2000, Page(s):1383 - 1389
    Cited by:  Papers (45)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    This brief presents a switched-capacitor dc-dc converter that offers features of voltage step-down, voltage step-up, and bidirectional power flow. Concept of energy transfer is achieved by using two current-controlled bidirectional converter cells, which operate in antiphase. Good regulation capability and continuous input current waveform are other substantial advantages that facilitate practical... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A high-performance encoder with priority lookahead

    Publication Year: 2000, Page(s):1390 - 1393
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (100 KB)

    In this brief, we introduce a priority encoder that uses a novel priority lookahead (PL) scheme to reduce delays associated with priority propagation. Two priority encoder approaches are presented, one without and the other with a PL scheme. For an N-bit encoder, the circuit with the PL scheme requires about 0.1 more transistors than the circuit without the scheme. However, a 32-bit very large sca... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A general class of ψ-APEX PCA neural algorithms

    Publication Year: 2000, Page(s):1394 - 1397
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    Principal component analysis (PCA) can be successfully applied to a variety of signal processing problems. Different analyzers have been reported in the scientific literature; among others, the Adaptive Principal component EXtractor (APEX) by Kung and Diamantaras has attracted much interest in the scientific community since it involves a specific neural architecture and a specific learning theory.... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Adaptive control of uncertain Chua's circuits

    Publication Year: 2000, Page(s):1397 - 1402
    Cited by:  Papers (66)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    In this brief, we consider the problem of adaptive backstepping control of the Chua's circuits with all the parameters unknown. First, we show that several types of Chua's circuits, including the Chua's oscillator, Chua's circuit with cubic nonlinearity, and Murali-Lakshmanan-Chua circuit, can be transformed into a class of nonlinear systems in the nonautonomous "strict-feedback" form. Second, an ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • On some recent developments of noise cleaning algorithms for chaotic signals

    Publication Year: 2000, Page(s):1403 - 1406
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (132 KB)

    This brief deals with the design of noise cleaning algorithms aimed at the decontamination of chaotic signals having a priori known dynamics. It clarifies the derivation of two recently proposed methods by showing that they are related to noise cleaning methods based on simple standard optimization techniques. In addition, the optimality of the two methods is considered, proving that one of the me... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.