# IEEE Transactions on Circuits and Systems I: Regular Papers

## Filter Results

Displaying Results 1 - 25 of 27

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
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• ### Pseudonoise Optical Modulation for Real-Time 3-D Imaging With Minimum Interference

Publication Year: 2007, Page(s):2109 - 2119
Cited by:  Papers (12)  |  Patents (5)
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In optical time-of-flight (TOF) range imaging, harmonic intensity modulation of the illumination source is very common. By detecting the phase delay between emitted and reflected sinusoids, the distance can be measured accurately. However, this harmonic approach does not allow for the concurrent operation of several TOF range cameras because the arbitrary superposition of several differently param... View full abstract»

• ### Development of Integrated Broad-Band CMOS Low-Noise Amplifiers

Publication Year: 2007, Page(s):2120 - 2127
Cited by:  Papers (32)
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This paper presents a systematic design methodology for broad-band CMOS low-noise amplifiers (LNAs). The feedback technique is proposed to attain a better design tradeoff between gain and noise. The network synthesis is adopted for the implementation of broad-band matching networks. The sloped interstage matching is used for gain compensation. A fully integrated ultra-wide-band 0.18-mum CMOS LNA i... View full abstract»

• ### A 8-GHz SiGe HBT VCO Design on a Low Resistive Silicon Substrate Using GSML

Publication Year: 2007, Page(s):2128 - 2136
Cited by:  Papers (6)
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A practical layout method called ground shield microstrip lines (GSML) is investigated for the reliable design of high frequency interconnection lines on a low resistive silicon substrate. GSML facilitates the prediction of parasitic networks at the expense of introducing negligible loss. The microwave performance of a GSML line structure is compared to that of a conventional metal line on the sam... View full abstract»

• ### Modeling and Design of Multilevel Bang–Bang CDRs in the Presence of ISI and Noise

Publication Year: 2007, Page(s):2137 - 2147
Cited by:  Papers (14)
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Multilevel clock-and-data recovery (CDR) systems are analyzed, modeled, and designed. A stochastic analysis provides probability density functions that are used to estimate the effect of intersymbol interference (ISI) and additive white noise on the characteristics of the phase detector (PD) in the CDR. A slope detector based novel multilevel bang-bang CDR architecture is proposed and modeled usin... View full abstract»

• ### An Analog Programmable Multidimensional Radial Basis Function Based Classifier

Publication Year: 2007, Page(s):2148 - 2158
Cited by:  Papers (29)  |  Patents (1)
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A compact analog programmable multidimensional radial basis function (RBF)-based classifier is demonstrated. The probability distribution of each feature in the templates is modeled by a Gaussian function that is approximately realized by the bell-shaped transfer characteristics of a proposed floating-gate circuit, which we term a floating-gate bump circuit. The maximum likelihood, the mean, and t... View full abstract»

• ### High-Voltage-Tolerant Analog Circuits Design in Deep-Submicrometer CMOS Technologies

Publication Year: 2007, Page(s):2159 - 2166
Cited by:  Papers (10)  |  Patents (5)
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Electrical stress-relieved analog circuit design techniques using only baseline devices are presented, 1-to-2 logic level shifter, optional diode insertion, and adaptive biasing scheme are introduced to meet a reliability guideline that ensures sufficient lifetime. The proposed idea was successfully demonstrated with 12-bit <i>I/Q</i> digital-to-analog converter (DAC) and an operationa... View full abstract»

• ### A Low-Power, Compact, Adaptive Logarithmic Transimpedance Amplifier Operating Over Seven Decades of Current

Publication Year: 2007, Page(s):2167 - 2177
Cited by:  Papers (24)
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This paper presents a detailed insight into the design space of wide-range transimpedance amplifiers enabling the design of micro-power, adaptive circuits for integrated current sensing applications. The analysis proves that the power dissipation of the nonadaptive structures varies linearly with dynamic range and quadratically with bandwidth. We present two adaptation techniques, modifying the bi... View full abstract»

• ### The Universal Circuit Simulator: A Mixed-Signal Approach to$n$-Port Network and Impedance Synthesis

Publication Year: 2007, Page(s):2178 - 2183
Cited by:  Papers (7)
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A mixed-signal universal architecture able to emulate the behavior of an n-port analog circuit is presented. It exploits second-generation current conveyors as analog input/output blocks and a field programmable gate array circuit as digital processing element. A prototype is also discussed for the specific case of a two-port network synthesis and experimental results in agreement with expected on... View full abstract»

• ### Fundamental Limitations of Continuous-Time Delta–Sigma Modulators Due to Clock Jitter

Publication Year: 2007, Page(s):2184 - 2194
Cited by:  Papers (67)  |  Patents (2)
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We examine noise due to clock jitter in single-loop low-pass continuous-time delta-sigma (Delta Sigma) modulators (CT-DSMs) employing nonreturn to zero (NRZ) feedback digital-to-analog converters (DACs). Using the discrete-time version of the Bode sensitivity integral, we derive a lower bound on jitter noise and its relationship to the noise transfer function (NTF) of the modulator. We show that N... View full abstract»

• ### Analytical Synthesis of Current-Mode High-Order Single-Ended-Input OTA and Equal-Capacitor Elliptic Filter Structures With the Minimum Number of Components

Publication Year: 2007, Page(s):2195 - 2210
Cited by:  Papers (46)
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None of the previously reported third-order and fourth-order operational transconductance amplifier and capacitor (OTA-C) elliptic filter structures use the minimum number of active and passive components. After an innovative algebraic decomposition for a complicated transfer function, i.e., a new <i>analytical synthesis method</i>, a current-mode odd-<i>n</i>th-order and a... View full abstract»

• ### A Wide-Band Power-Efficient Inductive Wireless Link for Implantable Microelectronic Devices Using Multiple Carriers

Publication Year: 2007, Page(s):2211 - 2221
Cited by:  Papers (124)  |  Patents (7)
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This paper presents a novel inductive link for wireless transmission of power and data to biomedical implantable microelectronic devices using multiple carrier signals. Achieving higher data bandwidth without compromising the power efficiency is the driving force behind using multiple separate carriers. Two separate pairs of coils have been utilized for inductive power and forward data transmissio... View full abstract»

• ### Multitone Feedback Through Demodulating Log Detector for Detection of Spurious Emissions in Software Radio

Publication Year: 2007, Page(s):2222 - 2228
Cited by:  Papers (4)
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This paper provides an analysis of a log detector in order to determine its response to a multitone input for detection of spurious emissions in a radio frequency transmitter. Treatment is given to the single tone response of the log detector and extended to a two-tone log detector system, where a large signal and a small signal are present. The large signal is observed to experience logarithmic p... View full abstract»

• ### A Low-Power Multicarrier-CDMA Downlink Baseband Receiver for Future Cellular Communication Systems

Publication Year: 2007, Page(s):2229 - 2239
Cited by:  Papers (10)
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In this paper, design and implementation of a baseband receiver integrated circuit (IC) for a downlink multi-carrier code-division multiple access (MC-CDMA) system are presented. This MC-CDMA system aims to provide higher data transmission capacity than the current wide-band CDMA systems in mobile cellular communication environments. The proposed chip provides a robust tracking mechanism for synch... View full abstract»

• ### A Versatile Variable Rate LDPC Codec Architecture

Publication Year: 2007, Page(s):2240 - 2251
Cited by:  Papers (17)  |  Patents (4)
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This paper presents a system architecture for low-density parity-check (LDPC) codes that allows dynamic switching of LDPC codes within the encoder and decoder without hardware modification of these modules. Thus, rate compatibility is facilitated without the performance degradation inherent in a puncture-based system. This versatility also allows the LDPC system to be used in a variety of applicat... View full abstract»

• ### Theoretical Upperbound of the Spurious-Free Dynamic Range in Direct Digital Frequency Synthesizers Realized by Polynomial Interpolation Methods

Publication Year: 2007, Page(s):2252 - 2261
Cited by:  Papers (18)
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In this paper, a universal mathematical method is proposed to determine the upperbound of the spurious-free dynamic range (SFDR) in direct digital frequency synthesizers (DDFSs) realized by piecewise polynomial interpolation methods. The Fourier series is used to establish a linear matrix relationship between the frequency spectrum of the interpolated sinusoidal signal and the coefficients of the ... View full abstract»

• ### Synthesis of Narrowband Linear-Phase FIR Filters With a Piecewise-Polynomial Impulse Response

Publication Year: 2007, Page(s):2262 - 2276
Cited by:  Papers (15)
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Classes of linear-phase finite-impulse response (FIR) filters with a piecewise-polynomial impulse response are proposed for the four types of linear-phase FIR filters. In addition, very efficient recursive structures to implement these filters in a straightforward and consistent manner are proposed. The desired impulse response is created by using a parallel connection of several filter branches. ... View full abstract»

• ### CNN-Based Hybrid-Order Texture Segregation as Early Vision Processing and Its Implementation on CNN-UM

Publication Year: 2007, Page(s):2277 - 2287
Cited by:  Papers (6)
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In this paper, a biologically inspired, CNN-based, multi-channel, texture boundary detection technique is presented. The proposed approach is similar to human vision system. The algorithm is simple and straightforward such that it can be implemented on the cellular neural networks (CNNs). CNN contains several important advantages, such as efficient real-time processing capability and feasible very... View full abstract»

• ### Stability Criteria for Impulsive Systems With Time Delay and Unstable System Matrices

Publication Year: 2007, Page(s):2288 - 2298
Cited by:  Papers (45)
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This paper studies stability problems of a class of impulsive systems with time delay whose linear parts contain unstable system matrices. By using the method of variation of parameters, Lyapunov functions and inequalities, several stability criteria are established for both linear and nonlinear impulsive systems with time delay. It is shown that the time delay systems can be stabilized by impulse... View full abstract»

• ### Chip Pulse Shaping in Asynchronous Chaos-Based DS-CDMA

Publication Year: 2007, Page(s):2299 - 2314
Cited by:  Papers (13)
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This paper extends and fully formalizes some previous results by developing an analytical method to account for the general chip pulse for DS-CDMA systems in an asynchronous environment with an integrate-and-dump receiver, applying it to commonly used pulses. Given the pulse, such a formal method allows us to define the optimum spreading code autocorrelation to be used and the relative signal-to-i... View full abstract»

• ### Passive Multiterminal Networks Without Transformers

Publication Year: 2007, Page(s):2315 - 2320
Cited by:  Papers (3)
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It is known that any scalar function f(p) of the complex frequency variable that is the admittance function of a passive finite network is in fact the admittance function of a network that can be realized without transformers. This paper shows that an m times m matrix-valued function Y(p), m ges 2, given that it is an admittance matrix, is the admittance of a network that contains no transformers ... View full abstract»

• ### Analytical Equations for Nonlinear Phase Errors and Jitter in Ring Oscillators

Publication Year: 2007, Page(s):2321 - 2329
Cited by:  Papers (21)
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In this paper, we present a simple analytical equation for capturing phase errors in 3-stage ring oscillators. The model, based on a simple but useful idealization of the ring oscillator, is provably exact for small noise perturbations. Despite its simplicity and purely analytical form, our model correctly captures the time- dependent sensitivity of oscillator phase to external perturbations. It i... View full abstract»

• ### Design of Linear Phase FIR Filters in Subexpression Space Using Mixed Integer Linear Programming

Publication Year: 2007, Page(s):2330 - 2338
Cited by:  Papers (59)
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In this paper, a novel optimization technique is proposed to optimize filter coefficients of linear phase finite-impulse response (FIR) filter to share common subexpressions within and among coefficients. Existing approaches of common subexpression elimination optimize digital filters in two stages: first, an FIR filter is designed in a discrete space such as finite wordlength space or signed powe... View full abstract»

• ### 2008 IEEE International Symposium on Circuits and Systems-engineering the environmental revolution (ISCAS 2008)

Publication Year: 2007, Page(s): 2339
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## 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