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IEEE Transactions on Circuits and Systems II: Express Briefs

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Displaying Results 1 - 23 of 23

Publication Year: 2016, Page(s):C1 - C4
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• IEEE Transactions on Circuits and Systems—II:Express Briefs publication information

Publication Year: 2016, Page(s): C2
| PDF (40 KB)
• A 200-MS/s Phase-Detector-Based Comparator With 400-$\mu\text{V}_{\mathrm{rms}}$ Noise

Publication Year: 2016, Page(s):813 - 817
| | PDF (1056 KB) | HTML

A low-noise phase-detector-based comparator is proposed for SAR ADCs. It can reduce the thermal-induced noise as well as the probability of the metastability. The proposed comparator is composed of two front-end dynamic comparators and a backend phase detector. The comparator has been fabricated in a 0.18-μm CMOS technology and achieves 400-μVrms noise at a conversion rate of 200 MHz... View full abstract»

• Sequential Load-Pull Technique for Multioctave Design of RF Power Amplifiers

Publication Year: 2016, Page(s):818 - 822
Cited by:  Papers (1)
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A design methodology for multioctave RF power amplifiers (PAs) is presented in this brief using sequential harmonic characterization. The investigation of in-band harmonics on the multioctave performance of the RF PA shows that a more optimal performance can be achieved using the proposed technique compared to the conventional load-pull. To demonstrate the capability of this technique, a broadband... View full abstract»

• 60-GHz CMOS Current-Combining PA With Adaptive Back-Off PAE Enhancement

Publication Year: 2016, Page(s):823 - 827
Cited by:  Papers (1)
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This brief describes the design and implementation of a current-combining power amplifier (PA) with a fully adaptive approach to enhance the output power and the back-off power added efficiency (PAE). The PA consists of a main amplifier and an auxiliary amplifier. Adaptive biasing technique is employed to shut down or provide optimum bias voltage to the auxiliary amplifier according to the input p... View full abstract»

• Digital Predistortion for Power Amplifier Based on Sparse Bayesian Learning

Publication Year: 2016, Page(s):828 - 832
Cited by:  Papers (3)
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In this brief, a sparse-Bayesian-learning algorithm is applied to estimate the coefficients of the power amplifier (PA) behavioral models and inverse models from the view of probability. With this sparse learning method, the needed number of samplings can be reduced significantly. In addition, it also provides researchers with ideas that obtain the needed subspace of the preselected model. The per... View full abstract»

• Multistage Complex-Impedance Matching Network Analysis and Optimization

Publication Year: 2016, Page(s):833 - 837
| | PDF (681 KB) | HTML

Some systems like RF energy harvesters have power transfer efficiency as one of the most important specifications. Therefore, the efficiency of the matching network, which affects the entire system's efficiency, plays an important role. When the impedance transformation factor between the antenna and its load is high, the matching network efficiency is decreased. In this brief, we present the effi... View full abstract»

• Distributed Robust Control for Linear Multiagent Systems With Intermittent Communications

Publication Year: 2016, Page(s):838 - 842
Cited by:  Papers (1)
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This brief solves the stabilization problem of linear multiagent systems with discontinuous observations and time-varying parameter uncertainties under an undirected communication topology, where the agents can only intermittently share their information with their neighbors. Distributed observer-type protocols are constructed based on the relative states of neighboring agents and absolute states ... View full abstract»

• A New Polytopic Approximation Method for Networked Systems With Time-Varying Delay

Publication Year: 2016, Page(s):843 - 847
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Introducing a network into a control loop brings great challenges as well as benefits to the system. Some network-induced imperfections, such as time-varying delays, may constitute obstacles for control tasks. In discrete-time modeling approaches for linear networked control systems with time-varying delays, discrete-time models with uncertainties appearing in an exponential form are usually obtai... View full abstract»

• An Optimized Logarithmic Converter With Equal Distribution of Relative Errors

Publication Year: 2016, Page(s):848 - 852
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State-of-the-art piecewise logarithmic converters employ nonuniform segments to reduce the variance of relative errors, particularly for small inputs. However, it is difficult to have an optimized algorithm to accurately choose the nonuniform segments for a required approximation error. In this brief, we present a relative error equal distribution (REED) algorithm that performs the nonuniform piec... View full abstract»

• Real-Time Digital Hardware Simulation of the Rodless Pneumatic System

Publication Year: 2016, Page(s):853 - 857
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This brief presents an area-efficient hardware implementation for simulating a rodless pneumatic system (RPS) in real time. The proposed implementation involves a very-large-scale-integration architecture. A hardware-sharing technique, which can be used to efficiently reduce the computational resources required, is incorporated into the architecture. Furthermore, the parameters and input/output bi... View full abstract»

• A Low-Power Low-Area Error-Detecting Latch for Resilient Architectures in 28-nm FDSOI

Publication Year: 2016, Page(s):858 - 862
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Resilient design is a promising approach to mitigate the performance losses resulting from process, voltage, and temperature variations and benefits from average-case path activity. Many such design techniques rely on error-detecting latches (EDLs) to identify timing errors. This brief presents a novel low-power low-area EDL that achieves 31.8% less energy consumption, 15.8% less leakage, and 35.4... View full abstract»

• An Efficient Decoder Architecture for Nonbinary LDPC Codes With Extended Min-Sum Algorithm

Publication Year: 2016, Page(s):863 - 867
Cited by:  Papers (1)
| | PDF (1238 KB) | HTML

Nonbinary low-density-parity-check (NB-LDPC) codes, an extension of binary LDPC codes, provide stronger error-correcting capability than binary LDPC codes. However, the performance gain comes together with extraordinary increase on decoding complexity and memory requirement. Many simplification algorithms have been proposed in the literature, and the extended min-sum (EMS) algorithm is the one wit... View full abstract»

• The Feedforward Short-Time Fourier Transform

Publication Year: 2016, Page(s):868 - 872
| | PDF (647 KB) | HTML

This brief presents the feedforward short-time Fourier transform (STFT). This new approach is based on reusing the calculations of the STFT at consecutive time instants. This leads to significant savings in hardware components with respect to fast Fourier transform based STFTs. Furthermore, the feedforward STFT does not have the accumulative error of iterative STFT approaches. As a result, the pro... View full abstract»

• Strategies for Reducing Decoding Cycles in Stochastic LDPC Decoders

Publication Year: 2016, Page(s):873 - 877
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This brief presents three strategies, including initialization based on Look Up Table (LUT), postprocessing based on bit flipping and hard decision based on the posterior information, to reduce the number of decoding cycles (DCs) for stochastic low-density parity-check decoding. For the standard IEEE 802.3an code, simulation indicates a 73.6% reduction in the average number of DCs with a satisfact... View full abstract»

• A Chaotic System With Equilibria Located on the Rounded Square Loop and Its Circuit Implementation

Publication Year: 2016, Page(s):878 - 882
Cited by:  Papers (17)
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A new 3-D chaotic system with infinitely many equilibria is proposed in this brief. It is exciting that these equilibrium points are located on a rounded square loop. Dynamical properties and the circuit implementation of the system are studied and reported. View full abstract»

• Globally Stable Synchronization of Chaotic Systems Based on Norm Observers Connected in Cascade

Publication Year: 2016, Page(s):883 - 887
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The synchronization of chaotic systems is achieved using output-feedback sliding mode control even in the presence of disturbances. Norm observers connected in cascade estimate upper bounds of the state variables required for the realization of the control law. This approach allows the proof of global stability and exponential convergence of the state errors based on Lyapunov's stability theory an... View full abstract»

• Improved Spatiotemporal Noise Reduction for Very Low-Light Environments

Publication Year: 2016, Page(s):888 - 892
| | PDF (1041 KB) | HTML

In this brief, an improved spatiotemporal noise reduction algorithm for images that are acquired through a complementary metal-oxide semiconductor image sensor (CIS) in very low-light environments is presented. To reduce the strong noises amplified by an automatic gain controller in the dark, a motion detection process is used to determine how the pixels from a spatial noise filter and a temporal ... View full abstract»

• Novel Results on Generalized Dissipativity of Two-Dimensional Digital Filters

Publication Year: 2016, Page(s):893 - 897
Cited by:  Papers (3)
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Existing results on the generalized dissipativity of digital filters are limited to 1-D cases. This brief presents some novel results on the generalized dissipativity of 2-D filters in the discrete Fornasini–Marchesini second (FMS) form. More specifically, we propose a criterion to ascertain that single 2-D filters in the discrete FMS form are 2-D generalized dissipative. Using this result,... View full abstract»

• Wireless-Power-Transfer System Using Near-Field Capacitively Coupled Resonators

Publication Year: 2016, Page(s):898 - 902
Cited by:  Papers (1)
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This brief presents the near-field capacitively coupled wireless charging system consisting of a transmitting dock resonator and a receiving multiband resonator. The transmitting dock resonator comprises a planar strip and a ring-shaped metal plate to deliver power to the multiple folded strips as the receiving 3-D multiband resonator at gigahertz band. The wireless charging system for a mobile ha... View full abstract»

• Limit Cycle Oscillation Reduction for Digital Low Dropout Regulators

Publication Year: 2016, Page(s):903 - 907
Cited by:  Papers (4)
| | PDF (1213 KB) | HTML

The digital low dropout regulator (D-LDO) has drawn significant attention recently for its low-voltage operation and process-scalability. However, the D-LDO inherently suffers from limit cycle oscillation (LCO). To address this issue, the modes and amplitudes of LCO are calculated in this work and verified by SPICE simulation in a 65-nm CMOS process. An LCO reduction technique for the D-LDO is the... View full abstract»

• Introducing IEEE Collabratec

Publication Year: 2016, Page(s): 908
| PDF (547 KB)
• IEEE Circuits and Systems Society Information

Publication Year: 2016, Page(s): C3
| PDF (34 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
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