# IEEE Transactions on Circuits and Systems I: Regular Papers

## Filter Results

Displaying Results 1 - 25 of 30

Publication Year: 2011, Page(s):C1 - C4
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• ### IEEE Transactions on Circuits and Systems—I: Regular Papers publication information

Publication Year: 2011, Page(s): C2
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• ### An Improved Broadband High Linearity SiGe HBT Differential Amplifier

Publication Year: 2011, Page(s):1685 - 1694
Cited by:  Papers (3)
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An improved all-npn broadband highly linear SiGe amplifier is presented. The operation of the proposed amplifier relies on two dependent translinear loops. The frequency response, linearity, input voltage swing range, and noise performance are analyzed. A broadband linear amplifier with 46 dBm OIP<sub>3</sub> at 20 MHz, 34 dBm OIP<sub>3</sub> at 1 GHz, 6 dB noise figure, an... View full abstract»

• ### A Nearly All-Digital Frequency Mixer Based on Nonlinear Digital-to-Analog Conversion and Intermodulation Cancellation

Publication Year: 2011, Page(s):1695 - 1704
Cited by:  Papers (1)
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We propose a nearly all-digital frequency mixer producing either the sum or difference of two frequencies provided as digital clocks. No filtering of the clock inputs is needed to suppress intermodulation products at the output. The mixer achieves high spurious-free dynamic range through optimization of an output nonlinear DAC and a multiphase intermodulation cancellation technique. A programmable... View full abstract»

• ### A Low-Noise Self-Oscillating Mixer Using a Balanced VCO Load

Publication Year: 2011, Page(s):1705 - 1712
Cited by:  Papers (10)
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A low-noise self-oscillating mixer (SOM) operating from 7.8 to 8.8 GHz is described in this paper. Three different components, the oscillator, the mixer core, and the LNA transconductor stage are assembled in a stacked configuration with full dc current-reuse from the VCO to the mixer to the LNA. The LC-tank oscillator also functions as a double-balanced IF load to the low-noise mixer core. A theo... View full abstract»

• ### A New Power Combining and Outphasing Modulation System for High-Efficiency Power Amplification

Publication Year: 2011, Page(s):1713 - 1726
Cited by:  Papers (52)  |  Patents (3)
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This paper describes a new power combining and outphasing system that provides both high efficiency and linear output control. Whereas conventional outphasing systems utilize two power amplifiers, the system introduced here combines power from four or more amplifiers. The proposed technique overcomes the loss and reactive loading problems of previous outphasing systems. It provides ideally lossles... View full abstract»

• ### Asymptotic Limits of Negative Group Delay in Active Resonator-Based Distributed Circuits

Publication Year: 2011, Page(s):1727 - 1735
Cited by:  Papers (32)
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In this paper the asymptotic limits of negative group delay (NGD) phenomena in multi-stage RLC resonator-based circuits are discussed. A NGD-bandwidth-product limit is derived as a function of the number of stages and the out-of-band gain, which is independent of the circuit topology and can include active gain compensation. The limit is verified experimentally at microwave frequencies using a gai... View full abstract»

• ### Analysis of Power Consumption and Linearity in Capacitive Digital-to-Analog Converters Used in Successive Approximation ADCs

Publication Year: 2011, Page(s):1736 - 1748
Cited by:  Papers (71)
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Successive-approximation analog-to-digital converters (SA-ADCs) are widely used in ultra-low-power applications. In this paper, the power consumption and the linearity of capacitive-array digital-to-analog converters (DACs) employed in SA-ADCs are analyzed. Specifically, closed-form formulas for the power consumption as well as the standard deviation of INL and DNL for three commonly-used radix-2 ... View full abstract»

• ### An Integrated Power-Efficient Active Rectifier With Offset-Controlled High Speed Comparators for Inductively Powered Applications

Publication Year: 2011, Page(s):1749 - 1760
Cited by:  Papers (112)  |  Patents (1)
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We present an active full-wave rectifier with offset-controlled high speed comparators in standard CMOS that provides high power conversion efficiency (PCE) in high frequency (HF) range for inductively powered devices. This rectifier provides much lower dropout voltage and far better PCE compared to the passive on-chip or off-chip rectifiers. The built-in offset-control functions in the comparator... View full abstract»

• ### A Rail-to-Rail Class-B Buffer With DC Level-Shifting Current Mirror and Distributed Miller Compensation for LCD Column Drivers

Publication Year: 2011, Page(s):1761 - 1772
Cited by:  Papers (9)
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A rail-to-rail class-B buffer with a dc level-shifting current mirror and the proposed distributed Miller compensation is presented for liquid crystal display (LCD) column drivers. By using a dc level-shifting current mirror, the rail-to-rail input stage directly turns on/off the rail-to-rail push-pull output stage without extra comparators. It results in a low-power rail-to-rail class-B buffer. B... View full abstract»

• ### Efficient Loopback Test for Aperture Jitter in Embedded Mixed-Signal Circuits

Publication Year: 2011, Page(s):1773 - 1784
Cited by:  Papers (8)
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Accurate measurement of aperture jitter for high-speed data converters is a difficult problem, since aperture jitter should be precisely separated from other jitter components as well as additive noise. This problem results in low test accuracy and high-yield loss. This paper presents a novel methodology for accurately predicting aperture jitter using a cost-effective loopback methodology. By usin... View full abstract»

• ### Novel Timing Yield Improvement Circuits for High-Performance Low-Power Wide Fan-In Dynamic OR Gates

Publication Year: 2011, Page(s):1785 - 1797
Cited by:  Papers (18)
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Dynamic gates are preferred in the design of high-performance modules in modern microprocessors due to the relatively high speed of dynamic gates compared with that of standard CMOS gates. These high performance modules have strict timing constraints. Due to the increased process variations in scaled technologies, the dynamic circuit delay exhibits a substantial variability around its nominal valu... View full abstract»

• ### Petrel: Power and Timing Attack Resistant Elliptic Curve Scalar Multiplier Based on Programmable${\rm GF}(p)$Arithmetic Unit

Publication Year: 2011, Page(s):1798 - 1812
Cited by:  Papers (24)
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This paper proposes a programmable GF(p) arithmetic unit for elliptic curve cryptography. The proposed unit can perform modular addition, subtraction, multiplication, inversion, and division. A suitable countermeasure against differential power analysis attack and doubling attack is proposed. An elliptic curve scalar multiplication hardware is subsequently designed for the curves defined ov... View full abstract»

• ### On the Convergence Behavior of the Affine Projection Algorithm for Adaptive Filters

Publication Year: 2011, Page(s):1813 - 1826
Cited by:  Papers (29)
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The affine projection class of algorithms (APA) provides faster convergence than LMS-based adaptive filters. Its convergence analysis is not as extensively studied as Normalized LMS (NLMS), and remains an active area of research. For tractability, most works on APA make many assumptions on the statistics of the input, as well as correlation between signals. Here we consider the effect of the corre... View full abstract»

• ### A Class of Wide-Band Linear-Phase FIR Differentiators Using a Two-Rate Approach and the Frequency-Response Masking Technique

Publication Year: 2011, Page(s):1827 - 1839
Cited by:  Papers (11)
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This paper introduces a class of wide-band linear-phase finite-length impulse response (FIR) differentiators. It is based on two-rate and frequency-response masking techniques. It is shown how to use these techniques to obtain all four types of linear-phase FIR differentiators. Design examples demonstrate that differentiators in this class can achieve substantial savings in arithmetic complexity i... View full abstract»

• ### A Second-Order Lowpass Parameter-Varying Filter Based on the Interconnection of First-Order Stages

Publication Year: 2011, Page(s):1840 - 1853
Cited by:  Papers (1)
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In recent years, a new class of filters known as parameter-varying filters has been proposed. These filters are characterized by having a transient response of reduced duration while preserving their frequency response properties. The reduction of the transient response of these filters is a consequence of the automatic adjustment of their parameters. These filters may be used in signal processing... View full abstract»

• ### ${\cal H}_{2}$Filtering for Discrete-Time Nonlinear Singularly Perturbed Systems

Publication Year: 2011, Page(s):1854 - 1864
Cited by:  Papers (9)
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In this paper, we consider theH2(or Kalman)-filtering problem for discrete-time singularly-perturbed (two time-scale) nonlinear systems. Two types of filters, namely, i) decomposition and ii) aggregate, are discussed, and sufficient conditions for the solvability of the problem in terms of new discrete-time Hamilton-Jacobi-Bellman equations (DHJBEs) are presented. For each type o... View full abstract»

• ### Statistical Analysis of Self-Oscillating Power Amplifiers

Publication Year: 2011, Page(s):1865 - 1876
Cited by:  Papers (2)
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Self-oscillating power amplifiers (SOPA) are promising solutions for amplification of high crest factor signals, with good linearity and efficiency, as a result of using a switch mode amplifier inside the oscillating loop. The lack of comprehensive and statistical analysis method complicates the design and analysis procedure. In this paper, a new statistical approach is presented to analyze the no... View full abstract»

• ### Analyzing Oscillations for an$N$-node Recurrent Neural Networks Model With Time Delays and General Activation Functions

Publication Year: 2011, Page(s):1877 - 1887
Cited by:  Papers (5)
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In this paper, the existence of oscillations for a type of recurrent neural network with time delays between neural interconnections is investigated. A new set of criteria is proposed to guarantee the existence of oscillations for a network model. The results are shown to be the generalization of some published works dealing with no delay systems. View full abstract»

• ### Design of Time-Delay Chaotic Electronic Circuits

Publication Year: 2011, Page(s):1888 - 1896
Cited by:  Papers (41)
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This paper investigates the problem of the design and the implementation of time-delay chaotic circuits. A simple feedback scheme consisting of a nonlinearity, a first-order RC circuit and a delay block has been fixed and a procedure to design the characteristics of these blocks in order to obtain chaotic dynamics has been introduced. A series of <i>n</i> Bessel filters in cascade is u... View full abstract»

• ### Pseudo-Chaotic Lossy Compressors for True Random Number Generation

Publication Year: 2011, Page(s):1897 - 1909
Cited by:  Papers (9)
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This paper presents a compression method that exploits pseudo-chaotic systems, to be applied to True Random Bit Generators (TRBGs). The theoretical explanation of the proposed compression scheme required the projection of some results achieved within the Ergodic Theory for chaotic systems on the world of digital pseudo-chaos. To this aim, a weaker and more general interpretation of the Shadowing T... View full abstract»

• ### Robust Delay-Dependent$H_{\infty}$Control of Uncertain Time-Delay Systems With Mixed Neutral, Discrete, and Distributed Time-Delays and Markovian Switching Parameters

Publication Year: 2011, Page(s):1910 - 1923
Cited by:  Papers (196)
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The problem of robust mode-dependent delayed state feedbackH∞control is investigated for a class of uncertain time-delay systems with Markovian switching parameters and mixed discrete, neutral, and distributed delays. Based on the Lyapunov-Krasovskii functional theory, new required sufficient conditions are established in terms of delay-dependent linear matrix inequalities for th... View full abstract»

• ### Distributed Higher Order Consensus Protocols in Multiagent Dynamical Systems

Publication Year: 2011, Page(s):1924 - 1932
Cited by:  Papers (167)
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This paper studies general higher order distributed consensus protocols in multiagent dynamical systems. First, network synchronization is investigated, with some necessary and sufficient conditions derived for higher order consensus. It is found that consensus can be reached if and only if all subsystems are asymptotically stable. Based on this result, consensus regions are characterized. It is p... View full abstract»

• ### Low-Energy Asynchronous Interleaver for Clockless Fully Parallel LDPC Decoding

Publication Year: 2011, Page(s):1933 - 1943
Cited by:  Papers (13)
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This paper presents a low-energy asynchronous interleaver for clockless fully parallel low-density parity-check (LDPC) decoding. The proposed data-transmission circuit based on a half-duplex single-track protocol makes it possible to realize a wire-efficient asynchronous interleaver with small energy consumption. Moreover, a data-monitoring system adaptively shuts down the asynchronous data-transm... View full abstract»

• ### Variable-Conversion-Ratio Switched-Capacitor-Voltage-Multiplier/Divider DC-DC Converter

Publication Year: 2011, Page(s):1944 - 1957
Cited by:  Papers (21)  |  Patents (2)
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An interleaved scheme of variable-conversion-ratio (VCR) multistage switched-capacitor-voltage-multiplier/divider (SCVM/SCVD) converter is proposed by combining a VCR-based phase generator and pulse-width-modulation (PWM) controller to integrate step-up and down modes in one structure for high-efficiency conversion. The power part consists of two mc-stage SC cells (front) and two n... 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.

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## Meet Our Editors

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