# 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
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• ### Super Class-AB OTAs With Adaptive Biasing and Dynamic Output Current Scaling

Publication Year: 2007, Page(s):449 - 457
Cited by:  Papers (46)  |  Patents (4)
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A new family of single-stage super Class-AB operational transconductance amplifiers (OTAs) suitable for low-voltage operation and low power consumption is presented. Three novel topologies are proposed featuring simplicity and compactness. They are based on the combination of adaptive biasing techniques for the differential input stage and nonlinear current mirrors for the active load that provide... View full abstract»

• ### Low-Power Architecture and Circuit Techniques for High-Boost Wide-Band$G_m$–$C$Filters

Publication Year: 2007, Page(s):458 - 468
Cited by:  Papers (17)
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A 330-MHz fifth-order Gm-C continuous-time low-pass filter with 24-dB boost is presented. Existing solutions are found to be unsuitable for low-power, wide-band, and high-boost operation. The proposed solution realizes two symmetric real axis zeros by efficiently combining transfer functions associated with all nodes of cascaded biquad cells. Application of Gilbert cell as a variable tr... View full abstract»

• ### A 30-MHz Fifth-Order Elliptic Low-Pass CMOS Filter With 65-dB Spurious-Free Dynamic Range

Publication Year: 2007, Page(s):469 - 480
Cited by:  Papers (33)
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A fifth-order 30-MHz integrated low-pass filter with 65-dB spurious-free dynamic range is presented. The topology is based on an operational transconductance amplifier (OTA)-C ladder configuration implementing an elliptic transfer function. High linearity and low noise are achieved by using polysilicon resistors and efficient highly linear transconductors based on a proposed nonlinear source degen... View full abstract»

• ### Programmable$G_{m}$–$C$Filters Using Floating-Gate Operational Transconductance Amplifiers

Publication Year: 2007, Page(s):481 - 491
Cited by:  Papers (25)
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We present programmable, fully differential Gm-C second-order sections (SOS) showing tunability over a wide range of frequencies. The SOSs use floating-gate operational transconductance amplifiers (FG-OTAs) to realize tunability. We present two FG programmable OTAs. The OTAs have a pFET input stage and employ current mirror topology. An FG common-mode feedback (CMFB) circuit as well as ... View full abstract»

• ### Statistics of the Quantization Noise in 1-Bit Dithered Single-Quantizer Digital Delta&ndash;Sigma Modulators

Publication Year: 2007, Page(s):492 - 503
Cited by:  Papers (58)  |  Patents (1)
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An analysis of the quantization noise introduced by a widely-used class of single-quantizer digital delta-sigma (DeltaSigma) modulators with low-level, 1-bit dither is presented. Necessary and sufficient conditions are derived that ensure, in an asymptotic sense, various ensemble statistical properties of the quantization noise such as uniformity and independence from the input and delayed version... View full abstract»

• ### On the Performance and Use of an Improved Source&ndash;Follower Buffer

Publication Year: 2007, Page(s):504 - 517
Cited by:  Papers (9)  |  Patents (2)
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An analysis of a proposed source-follower (SF)-based buffer circuit and its performance is presented. High linearity and wide bandwidth are achieved by the use of adaptive biasing of a SF transistor to mitigate the impact of the load current of the buffer and to speed up the settling behavior. The adaptive biasing is realized by means of a low gain current domain feedback that allows simultaneous ... View full abstract»

• ### Design and Implementation of a Baseband WCDMA Dual-Antenna Mobile Terminal

Publication Year: 2007, Page(s):518 - 529
Cited by:  Papers (5)  |  Patents (3)
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The design and implementation of a baseband wide-band code-division multiple access (WCDMA) dual-antenna mobile terminal system-on-a-chip (SoC) is presented in this paper. Spatial diversity processing mitigates wireless channel impairments and is a key enabling technology for WCDMA to support high quality of service at high data rates and capacity. The SoC integrates the baseband transceiver, codi... View full abstract»

• ### A Hardware Approach to Real-Time Program Trace Compression for Embedded Processors

Publication Year: 2007, Page(s):530 - 543
Cited by:  Papers (18)  |  Patents (3)
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Collecting the program execution traces at full speed is essential to the analysis and debugging of real-time software behavior of a complex system. However, the generation rate and the size of real-time program traces are so huge such that real-time program tracing is often infeasible without proper hardware support. This paper presents a hardware approach to compress program execution traces in ... View full abstract»

• ### Design of the Input Matching Network of RF CMOS LNAs for Low-Power Operation

Publication Year: 2007, Page(s):544 - 554
Cited by:  Papers (41)
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Optimum design of input matching network of CMOS low-noise amplifiers (LNAs) for low-power applications is discussed in this paper. This is done through an investigation of the effect of four different matching methodologies on the gain of radio frequency CMOS LNAs by means of compact analytical expressions. It is demonstrated that methods that convert the MOSFET's input impedance to 50 Omega for ... View full abstract»

• ### Reconfigurable Hardware Architectures for Sequential and Hybrid Decoding

Publication Year: 2007, Page(s):555 - 565
Cited by:  Papers (6)  |  Patents (2)
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A novel reconfigurable sequential decoder architecture based on the Fano algorithm is presented in which the constraint length, the threshold spacing, and the time-out threshold are all run time reconfigurable. To maximize decoding performance, a maximum possible backward depth (of a whole frame) is performed. This is achieved by using shift registers combined with memory to store the information ... View full abstract»

• ### Stability of the 2-D Givone&ndash;Roesser Model With Periodic Coefficients

Publication Year: 2007, Page(s):566 - 578
Cited by:  Papers (4)
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The stability of two-dimensional (2-D) periodically shift varying (PSV) filters formulated as the Givone-Roesser (GR) model is studied. The applications of these filters include processing video signals with cyclostationary noise, image and video scrambling, and design of multiplierless filters. The GR model is embedded into the second model of Fornasini-Marchesisni and the stability of this embed... View full abstract»

• ### Low-Harmonic Push–Pull Class-E Power Amplifier With a Pair of LC Resonant Networks

Publication Year: 2007, Page(s):579 - 589
Cited by:  Papers (8)
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This paper proposes a novel push-pull Class-E series-parallel resonant power amplifier (PA), which parallels two basic one-inductor, one-capacitor Class-E high-efficiency switching-mode tuned PA (Sokal, 1981) circuits. This proposed topology utilizes a push-pull scheme to realize sinusoidal output voltage. The previously published Class-E circuits (Sokal, 1981) can be implemented in a very simplif... View full abstract»

• ### Broad-Band Design Techniques for Transimpedance Amplifiers

Publication Year: 2007, Page(s):590 - 600
Cited by:  Papers (53)  |  Patents (1)
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In this paper, a novel bandwidth enhancement technique based on the combination of capacitive degeneration, broad-band matching network, and the regulated cascode (RGC) input stage is proposed and analyzed, which turns the transimpedance amplifier (TIA) design into a fifth-order low-pass filter with Butterworth response. This broad-band design methodology for TIAs is presented with an example impl... View full abstract»

• ### Geometric Algebra: A Powerful Tool for Representing Power Under Nonsinusoidal Conditions

Publication Year: 2007, Page(s):601 - 609
Cited by:  Papers (32)
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Geometric algebra is used in this paper for a rigorous mathematical treatment of power in single-phase circuits under nonsinusoidal conditions, as complex algebra for sinusoidal conditions. This framework clearly displays the multidimensional nature of power, which is represented by a multivector. The power multivector with its three attributes (magnitude, direction and sense) provides the means t... View full abstract»

• ### The Mathematical Foundation of Distributed Interleaved Systems

Publication Year: 2007, Page(s):610 - 619
Cited by:  Papers (24)  |  Patents (1)
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The distribution and interleaving (D&I) of signals is a common method for ripple attenuation in various engineering applications in such areas as control, communication, and power electronics. Similarities to this technique may also been found in nonengineering fields such as biology and medicine. This paper presents a mathematical exploration of distributed interleaved systems along with a si... View full abstract»

• ### Towards Accurate PWL Approximations of Parameter-Dependent Nonlinear Dynamical Systems With Equilibria and Limit Cycles

Publication Year: 2007, Page(s):620 - 631
Cited by:  Papers (9)
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This paper deals with piecewise-linear (PWL) approximations of nonlinear dynamical systems dependent on parameters and allowing the presence of few equilibria and/or limit cycles only. A method to derive the parameters of the PWL model is proposed that is based on the minimization of functionals defined to take into account a priori some dynamical features of the systems to be approximated. The me... View full abstract»

• ### State-Space Self-Tuning Control for Stochastic Fractional-Order Chaotic Systems

Publication Year: 2007, Page(s):632 - 642
Cited by:  Papers (20)
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Based on the modified state-space self-tuning control (STC), a novel low-order tuner via the modified observer/Kalman filter identification (OKID) is proposed for stochastic fractional-order chaotic systems. The OKID method is a time-domain technique that identifies a discrete input-output map by using known input-output sampled data in the general coordinate form, through an extension of the eige... View full abstract»

• ### Closed-Form Design of Digital IIR Integrators Using Numerical Integration Rules and Fractional Sample Delays

Publication Year: 2007, Page(s):643 - 655
Cited by:  Papers (22)
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In this paper, the numerical integration rules and fractional sample delays will be used to obtain the closed-form design of infinite-impulse response (IIR) digital integrators. There are two types of numerical integration rules to be investigated. One is Newton-Cotes quadrature rule, the other is Gauss-Legendre integration rule. Although the proposed IIR digital integrators will involve the imple... View full abstract»

• ### Closed-Form Design of Half-Sample Delay IIR Filter Using Continued Fraction Expansion

Publication Year: 2007, Page(s):656 - 668
Cited by:  Papers (6)
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In this paper, the closed-form design of half-sample delay infinite-impulse response (IIR) filter is presented. First, the continued fraction expansion (CFE) and its recursive computation are reviewed briefly. Then, the CFE of square root function is applied to design half-sample delay IIR filters with various orders. The comparisons with conventional maximally flat half-sample delay all-pass and ... View full abstract»

• ### Efficient Adaptive Nonlinear Filters for Nonlinear Active Noise Control

Publication Year: 2007, Page(s):669 - 681
Cited by:  Papers (91)
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In this paper, we treat nonlinear active noise control (NANC) with a linear secondary path (LSP) and with a nonlinear secondary path (NSP) in a unified structure by introducing a new virtual secondary path filter concept and using a general function expansion nonlinear filter. We discover that using the filtered-error structure results in greatly reducing the computational complexity of NANC. As a... View full abstract»

• ### Corrections and Comments to “Model Reduction of Discrete Linear Systems Via Frequency-Domain Balanced Structure”

Publication Year: 2007, Page(s):682 - 683
Cited by:  Papers (2)
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For original article by D. Wang and A. Zilouchian, see ibid vol. 47, no. 6, p. 830-37, Jun. 2000. This note gives the correction to a few mistakes in the aforementioned paper. It is also found that the derived reduced model (fourth-order) is unstable View full abstract»

• ### Authors' Reply [to "Corrections and Comments to 'Model Reduction of Discrete Linear Systems Via Frequency-Domain Balanced Structure'"]

Publication Year: 2007, Page(s):683 - 684
Cited by:  Papers (1)
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For original paper, see N. L. Prajapathy et al., ibid, vol. 54, no. 3, pp. 682-683, (2007). Reply to the comments on model reduction technique for discrete linear time invariant systems are presented. The proposed technique is based on a conceptual view point of the controllability and observability Grammians balancing of a system in an arbitrary frequency range. It can be considered as the genera... View full abstract»

• ### 2007 IEEE International Symposium on Circuits and Systems (ISCAS 2007)

Publication Year: 2007, Page(s): 685
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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.

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## Meet Our Editors

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