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# IEEE Transactions on Circuits and Systems II: Express Briefs

## Filter Results

Displaying Results 1 - 25 of 27
• ### Table of contents

Publication Year: 2008, Page(s):C1 - C4
| PDF (42 KB)
• ### IEEE Transactions on Circuits and Systems—II: Express Briefs publication information

Publication Year: 2008, Page(s): C2
| PDF (39 KB)
• ### A Low-Supply-Voltage CMOS Sub-Bandgap Reference

Publication Year: 2008, Page(s):609 - 613
Cited by:  Papers (28)
| | PDF (195 KB) | HTML

A low-power (21 muW ) bandgap reference source that is operable from a nominal supply voltage of 1.4 V is described. The circuit provides an output voltage equal to the bandgap voltage having a low output resistance and allows resistive loading. It does not use resistors or operational amplifiers. Thus, the design is suitable for fabrication in any digital CMOS technology. The circuit uses a curre... View full abstract»

• ### A Current-Mode Comparator for Digital Calibration of Amorphous Silicon AMOLED Displays

Publication Year: 2008, Page(s):614 - 618
Cited by:  Papers (7)  |  Patents (1)
| | PDF (1183 KB) | HTML

We present a digital calibration driving scheme for stabilizing the uniformity of large area amorphous silicon active-matrix organic light emitting diode displays. A current-mode analog-to-digital converter (ADC) is used to extract the differential aging of the individual pixels. For the ADC, a configurable current comparator is designed that employs the output buffer of the source driver to reduc... View full abstract»

• ### On the Spectral Tones in a Digital-Analog Converter Due to Mismatch and Flicker Noise

Publication Year: 2008, Page(s):619 - 623
Cited by:  Papers (1)
| | PDF (574 KB) | HTML

Spurious-free dynamic range (SFDR) is one of the most important design metrics for a high-performance digital-analog converter (DAC). SFDR is limited by both dynamic (switching) and static (mismatch) nonlinearities. A good design needs to ensure that the spurious spectral tones caused by the static mismatches do not limit the performance. Aggressively scaling device sizes have also aggravated the ... View full abstract»

• ### Analysis and Implementation of a 0.9-V Voltage-Controlled Oscillator With Low Phase Noise and Low Power Dissipation

Publication Year: 2008, Page(s):624 - 627
Cited by:  Papers (26)
| | PDF (668 KB) | HTML

A voltage-controlled oscillator (VCO) with low phase noise and low power dissipation for IEEE 802.11b is proposed. A negative resistance multiple-gated circuit with a bypass capacitor is adopted to improve phase noise. The chip is implemented in 0.18-mum CMOS process under a supply voltage of 0.9 V and power consumption of 2.7 mW. Its measured results show that the VCO has a phase noise of -122.3 ... View full abstract»

• ### Wien-Type Oscillators: Evaluation and Optimization of Harmonic Distortion

Publication Year: 2008, Page(s):628 - 632
Cited by:  Papers (7)
| | PDF (421 KB) | HTML

Theoretical study and design strategy for Wien oscillator circuits are presented. The analysis takes into account nonlinearities and allows to define an optimum design procedure minimizing distortion. The accuracy and viability of both the proposed analysis and design approach are confirmed experimentally. View full abstract»

• ### A 5-GHz Subharmonic Injection-Locked Oscillator and Self-Oscillating Mixer

Publication Year: 2008, Page(s):633 - 637
Cited by:  Papers (9)
| | PDF (736 KB) | HTML

This paper presents a multifunctional circuit realizing the functions of oscillation, mixing, amplification, and frequency multiplication at 5 GHz. A theoretical and experimental description of the circuit is given. The proposed circuit, which combines both the injection-locking and mixing processes, uses only one port where both the RF/intermediate frequency signal and the injection signal (IS) a... View full abstract»

• ### Experimental Analysis of Substrate Noise Effect on PLL Performance

Publication Year: 2008, Page(s):638 - 642
Cited by:  Papers (17)
| | PDF (990 KB) | HTML

This paper describes experimental approaches to analyze the effect of the substrate noise on phase-locked loop (PLL) performance. Spectral analysis considering noise transfer functions of the PLL is used to identify the substrate-noise sensitive components of the PLL. Analyzing the sidebands seen in a spectrum analyzer confirms the importance of knowing the PLL loop dynamics and noise transfer fun... View full abstract»

• ### Wireless Dosimeter: System-on-Chip Versus System-in-Package for Biomedical and Space Applications

Publication Year: 2008, Page(s):643 - 647
Cited by:  Papers (30)  |  Patents (1)
| | PDF (1312 KB) | HTML

A new floating-gate (FG) MOSFET based wireless dosimeter system-in-package (SiP) is presented. This miniature and completely integrated wireless dosimeter SiP comprises a CMOS FG radiation sensor and transmitter (TX) in a low-temperature co-fired ceramic (LTCC) package. The design is very well suited to wireless transmission of radiation sensor data in radiotherapy and to Extra Vehicular Activity ... View full abstract»

• ### Statistical Spectra and Distortion Analysis of Time-Interleaved Sampling Bandwidth Mismatch

Publication Year: 2008, Page(s):648 - 652
Cited by:  Papers (11)
| | PDF (690 KB) | HTML

Time interleaving is one of the most efficient techniques employed in the design of high-speed sampled-data systems. However, the mismatches appearing among different channels will create distortion tones that will degrade the system performance. This paper presents a detailed analysis of the effect of sampling bandwidth mismatches in the statistical behavior of time-interleaved sampling systems. ... View full abstract»

• ### A Fully Differential Band-Selective Low-Noise Amplifier for MB-OFDM UWB Receivers

Publication Year: 2008, Page(s):653 - 657
Cited by:  Papers (16)
| | PDF (684 KB) | HTML

A band-selective low-noise amplifier (BS-LNA) for multiband orthogonal frequency-division multiplexing ultra-wide-band (UWB) receivers is presented. A switched capacitive network that controls the resonant frequency of the LC load for the band selection is used. It greatly enhances the gain and noise performance of the LNA in each frequency band without increasing power consumption. Moreove... View full abstract»

• ### Low-Power Short-Range Radio CMOS Subharmonic RF Front-End Using CG-CS LNA

Publication Year: 2008, Page(s):658 - 662
Cited by:  Papers (8)
| | PDF (430 KB) | HTML

A 2.4-GHz fully integrated differential RF front-end was designed and implemented using 0.18-mum CMOS process. This design was targeted for low-power and low-cost applications such as short-range radio in biomedical devices. This RF front-end consists of a common-gate common-source low-noise-amplifier, a frequency doubler passive subharmonic mixer, and a resistive source degeneration intermediate ... View full abstract»

• ### A Low-Jitter Polyphase-Filter-Based Frequency Multiplier With Phase Error Calibration

Publication Year: 2008, Page(s):663 - 667
Cited by:  Papers (1)  |  Patents (2)
| | PDF (802 KB) | HTML

A new low-jitter polyphase-filter-based frequency multiplier incorporating a phase error calibration circuit to reduce the phase errors is presented. Designing with a multiplication ratio of eight, it has been fabricated in a 0.13-mum CMOS process. For input frequency of 25 MHz, the measured jitter is 2.46 ps (rms) and plusmn9.33 ps (pk-pk) at 200-MHz output frequency, while achievable maximum sta... View full abstract»

• ### A 1-V 1.25-GS/S 8-Bit Self-Calibrated Flash ADC in 90-nm Digital CMOS

Publication Year: 2008, Page(s):668 - 672
Cited by:  Papers (26)  |  Patents (1)
| | PDF (821 KB) | HTML

We present an 8-bit 1.25-GS/s flash analog-to-digital converter (ADC) in 90-nm digital CMOS with wide analog input bandwidth and low power dissipation. The ADC employs two key techniques: a self-biased track-and-hold amplifier which enhances the ADC full-scale voltage and enables the converter operating under a single 1-V supply; and an improved calibration scheme based on reference pre-distortion... View full abstract»

• ### A Low-Power Implementation of Asynchronous 8051 Employing Adaptive Pipeline Structure

Publication Year: 2008, Page(s):673 - 677
Cited by:  Papers (2)  |  Patents (1)
| | PDF (525 KB) | HTML

This paper presents a low-power implementation of the A8051 processor. It employs an adaptive pipeline structure that allows to skip a redundant stage operation and to combine with the neighboring empty stage. The processor has three features to reduce the power dissipation as well as to improve performance: multilooping control for multicycle instructions, branch predictor for unconditional branc... View full abstract»

• ### Sandberg's Representation Theorem and Classification of Linear Systems

Publication Year: 2008, Page(s):678 - 679
| | PDF (72 KB) | HTML

It is shown that the theorem on representation of linear time-invariant system input-output maps recently published by Sandberg can be used to formulate an interesting classification of the known linear system maps. A certain property of a system map defined in this theorem and closely related to the notion of approximately-finite or vanishing memory can be also used as the system classifier. Rest... View full abstract»

• ### Improving the Security of Chaotic Synchronization With a $Delta$-Modulated Cryptographic Technique

Publication Year: 2008, Page(s):680 - 684
Cited by:  Papers (5)
| | PDF (192 KB) | HTML

A secure chaos-based communication with a Delta-modulated chaotic cryptographic technique is developed in this paper. We prove that a Delta-modulated feedback control of a 1-D discrete- time control system gives rise to a chaotic system. Base on this chaotic system, a modified parameter modulation scheme is proposed to improve security. As illustrated by numerical simulation, the parameter in the ... View full abstract»

• ### Improved Bounds on the $L(2,1)$-Number of Direct and Strong Products of Graphs

Publication Year: 2008, Page(s):685 - 689
Cited by:  Papers (9)
| | PDF (179 KB) | HTML

The frequency assignment problem is to assign a frequency which is a nonnegative integer to each radio transmitter so that interfering transmitters are assigned frequencies whose separation is not in a set of disallowed separations. This frequency assignment problem can be modelled with vertex labelings of graphs. An L(2,1)-labeling of a graph G is a function f from the vertex... View full abstract»

• ### Improved Free-Weighting Matrix Approach for Stability Analysis of Discrete-Time Recurrent Neural Networks With Time-Varying Delay

Publication Year: 2008, Page(s):690 - 694
Cited by:  Papers (30)
| | PDF (150 KB) | HTML

This paper deals with the problem of exponential stability for a class of discrete-time recurrent neural networks with time-varying delay by employing an improved free-weighting matrix approach. The relationship among the time-varying delay, its upper bound and their difference is taken into account. As a result, a new and less conservative delay-dependent stability criterion is obtained without i... View full abstract»

• ### Optimal Filtering for Systems With Multiple Packet Dropouts

Publication Year: 2008, Page(s):695 - 699
Cited by:  Papers (67)
| | PDF (191 KB) | HTML

This paper is concerned with the optimal filtering problem for discrete-time stochastic linear systems with multiple packet dropouts, where the number of consecutive packet dropouts is limited by a known upper bound. Without resorting to state augmentation, the system is converted to one with measurement delays and a moving average (MV) colored measurement noise. An unbiased optimal filter is deve... View full abstract»

• ### A Gaussian Approximation of High-Order Distortion Spectrum in Broadband Amplifiers

Publication Year: 2008, Page(s):700 - 704
Cited by:  Papers (2)
| | PDF (218 KB) | HTML

A novel analytical Gaussian approximation is developed for the evaluation of the distortion spectrum introduced by a nonlinear amplifier. This method allows to consider high-order distortion contributions when the device is driven by a broadband signal with Gaussian amplitude distribution. The results are applied to a ninth-order power series model based on well known single-tone and two-tone anal... View full abstract»

• ### An FPGA Implementation of MML-DFE for Spatially Multiplexed MIMO Systems

Publication Year: 2008, Page(s):705 - 709
Cited by:  Papers (11)
| | PDF (402 KB) | HTML

Although the maximum-likelihood decision-feedback equalization (ML-DFE) detection method for multi-input multi- output (MIMO) system leads to a good compromise between the performance and the complexity, the computational complexity of the ML part in the ML-DFE is still large. This paper describes a modified maximum-likelihood (MML) algorithm, which reduces the computational complexity of the orig... View full abstract»

• ### Comments on "Improved Sufficient Conditions for Global Asymptotic Stability of Delayed Neural Networks

Publication Year: 2008, Page(s): 710
| | PDF (60 KB) | HTML

In this note, we point out that the results given in the paper by Wu and Cui (2007) can be obtained by using the results given in Lu (2003). Moreover, the results given in the second paper are much stronger under less restrictive conditions. View full abstract»

• ### Special Issue on: Circuits and Systems Solutions for Nanoscale CMOS Design Challenges

Publication Year: 2008, Page(s): 711
| PDF (682 KB)

## Aims & Scope

Part I will now contain regular papers focusing on all matters related to fundamental theory, applications, analog and digital signal processing. Part II will report on the latest significant results across all of these topic areas.

Full Aims & Scope

## Meet Our Editors

Editor-in-Chief

Chi K. Michael Tse
Dept. of Electronic and Information Engineering
Hong Kong Polytechnic University
Hunghom, Hong Kong
cktse@ieee.org