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Circuits and Systems I: Regular Papers, IEEE Transactions on

Issue 2 • Date Feb. 2004

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Displaying Results 1 - 23 of 23
  • Table of contents

    Publication Year: 2004 , Page(s): c1 - c4
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  • IEEE Transactions on Circuits and Systems—I: Regular Papers publication information

    Publication Year: 2004 , Page(s): c2
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  • Digital noise-shaping of residues in dual-quantization sigma-delta modulators

    Publication Year: 2004 , Page(s): 225 - 232
    Cited by:  Papers (10)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (376 KB) |  | HTML iconHTML  

    A new dual-quantization Sigma-Delta modulator is proposed in this paper where the coarse-quantizer output, obtained from the fine-quantizer output by means of a digital noise-shaping coder, is fed back to the input of the first integrator by means of a p-bit digital-to-analog converter (DAC) (typically, p=1). To avoid the truncation error inserted into the first integrator to propagate to the rest... View full abstract»

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  • Averaging technique in flash analog-to-digital converters

    Publication Year: 2004 , Page(s): 233 - 253
    Cited by:  Papers (17)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (840 KB) |  | HTML iconHTML  

    The averaging technique is used in flash analog-to-digital converters to reduce nonlinearities resulting from random offset voltages of the pre-amplifiers, which stand before the comparators. The main contribution of this paper is to provide further insight into this technique, through exact closed-form expressions obtained for the output voltage, gain, integral nonlinearity and differential nonli... View full abstract»

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  • Differential log-domain filters with high-gain common-mode feedback

    Publication Year: 2004 , Page(s): 254 - 263
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (656 KB) |  | HTML iconHTML  

    A new class of differential log-domain filters based on common-mode feedback (CMFB) is demonstrated. Conditions for adding CMFB to differential log-domain integrators while preserving external linearity are derived. Because signals within differential log-domain circuits are nonlinear, the definition of "common-mode" in these circuits is not unique. Three possible definitions are explored, and eac... View full abstract»

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  • Mixed-signal equalization architectures for printed circuit board channels

    Publication Year: 2004 , Page(s): 264 - 274
    Cited by:  Papers (6)  |  Patents (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (528 KB) |  | HTML iconHTML  

    This paper develops mixed-signal equalization solutions for gigabit communications in printed circuit boards (PCBs). The PCB channel, composed by vias and interconnects, distorts, and produces signal reflections that deteriorate quality of high-speed data transmission. Analog signal processing architectures are necessary to combat the inter-symbol interference effects introduced by the channel sin... View full abstract»

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  • Miller compensation using current buffers in fully differential CMOS two-stage operational amplifiers

    Publication Year: 2004 , Page(s): 275 - 285
    Cited by:  Papers (45)  |  Patents (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (336 KB) |  | HTML iconHTML  

    Several Miller compensation schemes using a current buffer in series with the compensation capacitor to modify the right-half-plane zero in fully differential two-stage CMOS operational amplifiers are analyzed. One scheme uses a current mirror as a current buffer, while the rest use a common-gate transistor as a current buffer. The gain transfer functions are derived for each topology, and approxi... View full abstract»

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  • A mixed-mode polynomial cellular array processor hardware realization

    Publication Year: 2004 , Page(s): 286 - 297
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (688 KB) |  | HTML iconHTML  

    A mixed-mode cellular array processor is presented in which the processing units (PUs) are coupled with programmable polynomial (linear, quadratic, and cubic) first neighborhood feedback terms. It combines analog and digital processing so that the couplings and the polynomial terms are implemented with analog blocks whereas the integrator is digital, and analog-to-digital and digital-to-analog con... View full abstract»

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  • CMOS implementation of nonlinear spectral-line timing recovery in digital data-communication systems

    Publication Year: 2004 , Page(s): 298 - 308
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (544 KB) |  | HTML iconHTML  

    In many of the digital communication systems where a form of passband modulation scheme is used, carrierless amplitude and phase modulation (CAP) or quadrature and amplitude modulation for example, the signal waveform does not contain a baud-rate spectral line. This paper describes analog and all-digital implementations of timing recovery using the nonlinear spectral-line method. The analog implem... View full abstract»

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  • A novel pole-zero compensation scheme using unbalanced differential pairs

    Publication Year: 2004 , Page(s): 309 - 318
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (584 KB) |  | HTML iconHTML  

    The main problem in extending continuous-time filtering to higher frequencies is the sensitivity of high-frequency filters to analog integrator nonidealities such as finite dc gain and parasitic poles. The use of a cascode stage introduces internal nodes, and hence a nondominant pole, in the signal path. This has been overcome using a novel phase compensation scheme which does not require tuning o... View full abstract»

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  • RF circuit implications of moderate inversion enhanced linear region in MOSFETs

    Publication Year: 2004 , Page(s): 319 - 328
    Cited by:  Papers (58)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (416 KB) |  | HTML iconHTML  

    The implications for radio frequency circuit design of the nonlinear behavior of a MOSFET transistor over all regions of operation, including moderate inversion region, are investigated. Third-order intermodulation distortion in a MOSFET amplifier is analyzed by means of Volterra Series representation. Analysis and measurements reveal a significant peaking, or "sweet-spot" of the third-order inter... View full abstract»

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  • Design of voltage-mode and current-mode computational circuits using floating-gate MOS transistors

    Publication Year: 2004 , Page(s): 329 - 341
    Cited by:  Papers (8)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (456 KB) |  | HTML iconHTML  

    In this paper, we present voltage-mode and current-mode computational circuits using floating-gate MOS (FGMOS) transistors, operating in saturation region. The circuits are designed using two FGMOS basic-cells, each one formed by three floating-gate transistors with common source. The first basic cell is connected in voltage mode, while the second one is connected in current-mode configuration in ... View full abstract»

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  • An ON-OFF orientation selective address event representation image transceiver chip

    Publication Year: 2004 , Page(s): 342 - 353
    Cited by:  Papers (40)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (624 KB) |  | HTML iconHTML  

    This paper describes the electronic implementation of a four-layer cellular neural network architecture implementing two components of a functional model of neurons in the visual cortex: linear orientation selective filtering and half wave rectification. Separate ON and OFF layers represent the positive and negative outputs of two-phase quadrature Gabor-type filters, whose orientation and spatial-... View full abstract»

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  • A novel architecture and a systematic graph-based optimization methodology for modulo multiplication

    Publication Year: 2004 , Page(s): 354 - 370
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (552 KB) |  | HTML iconHTML  

    A novel hardware algorithm, a VLSI architecture, and an optimization methodology for residue multipliers are introduced in this paper. The proposed design approach identifies certain properties of the bit products that participate in the residue product computation and subsequently exploits them to reduce the complexity of the implementation. A set of introduced theorems is used to identify the pa... View full abstract»

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  • Modified register-exchange Viterbi decoder for low-power wireless communications

    Publication Year: 2004 , Page(s): 371 - 378
    Cited by:  Papers (17)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (312 KB) |  | HTML iconHTML  

    In this paper, a new implementation of the Viterbi decoder (VD), based on a modified register-exchange (RE) method, is proposed. Conceptually, the RE method is simpler and faster than the trace-back (TB) method. However, the disadvantage of the RE method is that every bit in the memory must be read and rewritten for each bit of information decoded. The proposed implementation adopts the "pointer" ... View full abstract»

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  • Blind matched filter receiver

    Publication Year: 2004 , Page(s): 379 - 390
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (384 KB) |  | HTML iconHTML  

    Matched filter receiver (MFR) of Forney in the presence of intersymbol interference (ISI) and additive white Gaussian noise is investigated from a blind perspective, which includes blind maximum likelihood sequence detection, blind decision feedback equalization and linear blind equalization. Various realizations of the blind MFR are discussed. In a blind MFR, the channel can be easily estimated u... View full abstract»

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  • Coexistence of chaos-based and conventional digital communication systems of equal bit rate

    Publication Year: 2004 , Page(s): 391 - 408
    Cited by:  Papers (11)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (648 KB) |  | HTML iconHTML  

    Chaos-based communication systems represent a new category of spread-spectrum communication systems, whose working principle differs significantly from conventional direct-sequence and frequency-hopping spread-spectrum systems. However, like all other kinds of spread-spectrum systems, chaos-based systems are required to provide reasonable bit error performance in the presence of a narrow-band sign... View full abstract»

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  • Synthesis of static and dynamic multiple-input translinear element networks

    Publication Year: 2004 , Page(s): 409 - 421
    Cited by:  Papers (19)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (352 KB) |  | HTML iconHTML  

    In this paper, we discuss the process of synthesizing static and dynamic multiple-input translinear element (MITE) networks systematically from high-level descriptions given in the time domain, in terms of static polynomial constraints and algebraic differential equations. We provide several examples, illustrating the process for both static and dynamic system constraints. Although our examples wi... View full abstract»

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  • A time-domain technique for computation of noise-spectral density in linear and nonlinear time-varying circuits

    Publication Year: 2004 , Page(s): 422 - 433
    Cited by:  Papers (10)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (368 KB) |  | HTML iconHTML  

    This paper presents a new time-domain technique for computing the noise-spectral density. The power-spectral density (PSD) is interpreted as the asymptotic value of the expected energy-spectral density per unit time. The methodology of stochastic differential equations is used to derive a set of ordinary differential equations for the expected energy-spectral density. This set of equations can the... View full abstract»

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  • IEEE International Symposium on Circuits and Systems (ISCAS2004)

    Publication Year: 2004 , Page(s): 434
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    Freely Available from IEEE
  • 11th IEEE International Conference on Electronics, Circuits and Systems (ICECS 2004)

    Publication Year: 2004 , Page(s): 435
    Save to Project icon | Request Permissions | PDF file iconPDF (495 KB)  
    Freely Available from IEEE
  • IEEE Transactions on Circuits and Systems—I: Regular Papers Information for authors

    Publication Year: 2004 , Page(s): 436
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    Freely Available from IEEE
  • IEEE Circuits and Systems Society Information

    Publication Year: 2004 , Page(s): c3
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    Freely Available from IEEE

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
Shanthi Pavan
Indian Institute of Technology, Madras