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# IEEE Transactions on Circuits and Systems I: Regular Papers

## Filter Results

Displaying Results 1 - 25 of 29

Publication Year: 2007, Page(s):C1 - C4
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• ### IEEE Transactions on Circuits and Systems&mdash;I: Regular Papers publication information

Publication Year: 2007, Page(s): C2
| PDF (36 KB)
• ### Pulsewidth Modulation Circuits Using CMOS OTAs

Publication Year: 2007, Page(s):1869 - 1878
Cited by:  Papers (35)  |  Patents (2)
| | PDF (583 KB) | HTML

This paper presents three pulsewidth modulation modulators using CMOS operational transconductance amplifiers. They consist of a ramp integrator and current-tunable Schmitt triggers. Prototype circuits built using discrete components exhibited that their duty cycles are linearly controllable. Because of their simple structure, the proposed modulators can be easily fabricated in a monolithic integr... View full abstract»

• ### Full On-Chip CMOS Low-Dropout Voltage Regulator

Publication Year: 2007, Page(s):1879 - 1890
Cited by:  Papers (269)  |  Patents (14)
| | PDF (1617 KB) | HTML

This paper proposes a solution to the present bulky external capacitor low-dropout (LDO) voltage regulators with an external capacitorless LDO architecture. The large external capacitor used in typical LDOs is removed allowing for greater power system integration for system-on-chip (SoC) applications. A compensation scheme is presented that provides both a fast transient response and full range al... View full abstract»

• ### Adaptive Noise Cancellation Techniques in Sigma–Delta Analog-to-Digital Converters

Publication Year: 2007, Page(s):1891 - 1899
Cited by:  Papers (5)  |  Patents (1)
| | PDF (434 KB) | HTML

Adaptive noise cancellation (ANC) techniques that extract a desired signal from background noise have many applications in different engineering disciplines. In ANC, the corrupted signal is passed through a filter that tends to suppress the noise while leaving the original signal unchanged. This paper demonstrates that the adaptive noise cancellation technique can be embedded in the digital signal... View full abstract»

• ### Novel Process and Temperature-Stable, IDD Sensor for the BIST Design of Embedded Digital, Analog, and Mixed-Signal Circuits

Publication Year: 2007, Page(s):1900 - 1915
Cited by:  Papers (7)
| | PDF (1945 KB) | HTML

This paper proposes a new IDD sensor for built-in self-test (BIST) applications for digital, analog, and mixed-signal circuits. This novel, wide-band, nonintrusive, process and temperature-stable IDD sensor operates up to 230 MHz, which is 2.3X faster than previously proposed designs, and occupies 78.3% less area than another competing design. A BIST utilizing this novel IDD sensor is created and ... View full abstract»

• ### Power–Delay–Area–Noise Margin Tradeoffs in Positive-Feedback MOS Current-Mode Logic

Publication Year: 2007, Page(s):1916 - 1928
Cited by:  Papers (17)
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In this paper, positive feedback source-coupled logic (PFSCL) gates are analyzed from a design point of view. The design space is explored through analytical relationships which relate the gate delay, power consumption and noise margin, which are modeled through a simplified circuit analysis. To be more specific, a simple and accurate model of the noise margin is used to derive a systematic design... View full abstract»

• ### High-Speed Architecture Design of Tomlinson–Harashima Precoders

Publication Year: 2007, Page(s):1929 - 1937
Cited by:  Papers (14)  |  Patents (2)
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Like decision feedback equalizers (DFEs), Tomlinson-Harashima precoders (TH precoders) contain nonlinear feedback loops, which limit their use for high-speed applications. Unlike in DFEs where the output levels of the nonlinear devices are finite, in TH precoders, theoretically, the output levels of the modulo devices are infinite. Thus, it is difficult to apply look-ahead and pre-computation tech... View full abstract»

• ### Adaptive Beamforming Using Frequency Invariant Uniform Concentric Circular Arrays

Publication Year: 2007, Page(s):1938 - 1949
Cited by:  Papers (25)
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This paper proposes new adaptive beamforming algorithms for a class of uniform concentric circular arrays (UCCAs) having near-frequency invariant characteristics. The basic principle of the UCCA frequency invariant beamformer (FIB) is to transform the received signals to the phase mode representation and remove the frequency dependence of individual phase modes through the use of a digital beamfor... View full abstract»

• ### Optimal Design of Nearfield Wideband Beamformers Robust Against Errors in Microphone Array Characteristics

Publication Year: 2007, Page(s):1950 - 1959
Cited by:  Papers (37)
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Nearfield wideband beamformers for microphone arrays have wide applications, such as hands-free telephony, hearing aids, and speech input devices to computers. The existing design approaches for nearfield wideband beamformers are highly sensitive to errors in microphone array characteristics, i.e., microphone gain, phase, and position errors, as well as sound speed errors. In this paper, a robust ... View full abstract»

• ### Parasitics Realization in State-Space Average-Value Modeling of PWM DC–DC Converters Using an Equal Area Method

Publication Year: 2007, Page(s):1960 - 1967
Cited by:  Papers (41)
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Average-value modeling of pulsewidth-modulation dc-dc converters is often based on the assumption of piecewise-linear waveforms of the circuit variables, whereas considering parasitics introduces waveform nonlinearity and complicates the model derivation. This paper presents a new approach that considers averaging with nonlinear waveforms using the equivalent area method, and proposes a state-spac... View full abstract»

• ### A Repetitive-Based Controller for a Power Factor Precompensator

Publication Year: 2007, Page(s):1968 - 1976
Cited by:  Papers (24)
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In this paper, a repetitive-based controller for a boost-based power factor precompensator is presented. The controller guarantees voltage regulation with a power factor close to unity, despite of the presence of harmonic distortion in the source voltage and uncertainties in the system parameters. It is shown that the repetitive scheme considered here is, in fact, equivalent to a bank of resonant ... View full abstract»

• ### Super-Resolution Time Delay Estimation in Multipath Environments

Publication Year: 2007, Page(s):1977 - 1986
Cited by:  Papers (30)
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The super-resolution time delay estimation in multipath environment is very important for many applications. Conventional super-resolution approaches can only deal with signals with wideband and flat spectra. In this paper, we propose a novel super-resolution time delay estimation method that can treat signals with narrowband spectra. In our method, the time delay estimation is first transformed i... View full abstract»

• ### Design Methodology for Domain Specific Parameterizable Particle Filter Realizations

Publication Year: 2007, Page(s):1987 - 2000
Cited by:  Papers (14)
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This paper presents a reconfigurable particle filter design methodology for a real-time bearings-only tracking application. The methodology provides the capability of selecting a single particle filter from multiple particle filter realizations with maximum resource sharing. The autonomous buffer controller mechanism for the architecture ensures correct operation of the particle filters. Parameter... View full abstract»

• ### Closed-FormRCandRLCDelay Models Considering Input Rise Time

Publication Year: 2007, Page(s):2001 - 2010
Cited by:  Papers (15)
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The Elmore delay model is the most popular and efficient delay model used for analytical delay estimation. Closed-form delay formulas are useful for circuit design, timing-driven physical design, synthesis, and optimization. As signal rise time becomes faster and the line resistance becomes smaller from copper technology, the significance of inductance increases. Both RC and RLC delays are a stron... View full abstract»

• ### A Method for Reduced Finite Precision Effects in Parallel Filtering Echo Cancellation

Publication Year: 2007, Page(s):2011 - 2018
Cited by:  Papers (2)
| | PDF (649 KB) | HTML

The two-path algorithm is an adaptive filter algorithm based on a parallel filter structure, which has been found to be useful for line echo cancellation as well as for acoustic echo cancellation. It is well known that in finite precision arithmetic, the adaptation process of adaptive algorithms can be reduced or even halted due to finite precision effects. This paper proposes a variant of the two... View full abstract»

• ### Adaptive Tracking Control of Chaotic Systems With Applications to Synchronization

Publication Year: 2007, Page(s):2019 - 2029
Cited by:  Papers (48)
| | PDF (848 KB) | HTML

We address the problem of controlled synchronization of a class of uncertain chaotic systems. Our approach follows techniques of adaptive tracking control and identification of dynamic systems from recent developments of control theory. In particular, we use new notions of the so-called property of persistency of excitation - known to be sufficient and necessary for parameter estimation - to const... View full abstract»

• ### RSNS-to-Binary Conversion

Publication Year: 2007, Page(s):2030 - 2043
Cited by:  Papers (8)  |  Patents (2)
| | PDF (721 KB) | HTML

The robust symmetrical number system (RSNS) is a symmetrical number system formed such that only one element in each RSNS vector changes between code transitions. This integer Gray-code property makes the RSNS useful in analog-to-digital converters (ADC), direction finding antenna architectures and electro-optical ADCs since it eliminates any encoding errors that can occur when the input signal li... View full abstract»

• ### A Digital Receiver Architecture for Bluetooth in 0.25-$\mu$m CMOS Technology and Beyond

Publication Year: 2007, Page(s):2044 - 2053
Cited by:  Papers (3)  |  Patents (1)
| | PDF (1685 KB) | HTML

A digital receiver architecture for short-range communications systems like Bluetooth is presented. The architecture is tailored to a highly integrated Bluetooth single-chip integrated circuit (IC) and can easily be adapted to other communications systems using a Gaussian frequency-shift keying (GFSK ) modulation scheme. The single-chip IC integrates the complete digital baseband and radio frequen... View full abstract»

• ### Analytic Solution to the Photovoltaic Maximum Power Point Problem

Publication Year: 2007, Page(s):2054 - 2060
Cited by:  Papers (103)  |  Patents (38)
| | PDF (317 KB) | HTML

Photovoltaic (PV) power has been successfully used for over five decades. Whether in dc or ac form, photovoltaic cells provide power for systems in many applications on earth and space. Its principles of operation are therefore well understood, and circuit equivalents have been developed that accurately model the nonlinear relationship between the current and voltage of a photovoltaic cell. With t... View full abstract»

• ### A New Constructive Procedure for 2-D Coprime Realization in Fornasini–Marchesini Model

Publication Year: 2007, Page(s):2061 - 2069
Cited by:  Papers (22)
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This paper presents a new constructive procedure for coprime realization of 2-D systems by means of the Fornasini-Marchesini second (FM-II) local state-space model. By exploiting the structural properties of an FM-II model realization, the proposed method can reduce the upper bound on the realization order for a large class of 2-D systems to about half of that obtained by the realization procedure... View full abstract»

• ### Delay-Dependent$H_{\infty }$Control and Filtering for Uncertain Markovian Jump Systems With Time-Varying Delays

Publication Year: 2007, Page(s):2070 - 2077
Cited by:  Papers (352)
| | PDF (433 KB) | HTML

This paper deals with the problems of delay-dependent robust Hinfincontrol and filtering for Markovian jump linear systems with norm-bounded parameter uncertainties and time-varying delays. In terms of linear matrix inequalities, improved delay-dependent stochastic stability and bounded real lemma (BRL) for Markovian delay systems are obtained by introducing some slack matrix variables.... View full abstract»

• ### Robust Dichotomy Analysis and Synthesis With Application to an Extended Chua's Circuit

Publication Year: 2007, Page(s):2078 - 2086
Cited by:  Papers (5)
| | PDF (658 KB) | HTML

Dichotomy, or monostability, is one of the most important properties of nonlinear dynamic systems. For a dichotomous system, the solution of the system is either unbounded or convergent to a certain equilibrium, thus periodic or chaotic states cannot exist in the system. In this paper, a new methodology for the analysis of dichotomy of a class of nonlinear systems is proposed, and a linear matrix ... View full abstract»

• ### Theoretical Design and Circuit Implementation of Multidirectional Multi-Torus Chaotic Attractors

Publication Year: 2007, Page(s):2087 - 2098
Cited by:  Papers (46)
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This paper introduces a novel fourth-order double-torus chaotic circuit. Based on this basic circuit, a systematic theoretical design approach is proposed for generating 1-Dn torus, 2-D n times m-torus, 3-D n times m times I torus, and 4-D n times m times l times p torus chaotic attractors. This is the first autonomous circuit reported in the literature for generating multidirectional multi-torus ... View full abstract»

• ### Generalized Multivariate Rectangular Matrix PadÉ-Type Approximants

Publication Year: 2007, Page(s):2099 - 2105
Cited by:  Papers (2)
| | PDF (263 KB) | HTML

A new method for the construction of generalized multivariate rectangular matrix Pade-type approximants on a rectangular grid is introduced in this paper, by choosing an arbitrary monic bivariate polynomial as the generating one of the approximant. We discuss their several typical important properties and study the connection between bivariate rectangular matrix Pade-type approximants and Pade app... View full abstract»

## Aims & Scope

The theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief
Andreas Demosthenous
Dept. Electronic & Electrical Engineering
University College London
London WC1E 7JE, UK