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• In brief

Publication Year: 2010, Page(s): 1094
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First Page of the Article
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• Interview

Publication Year: 2010, Page(s): 1094
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Professor Toshihiko Baba from Yokohama National University in Japan shares his motivations for the research behind the Letter 'Lowloss simple waveguide intersection in silicon photonics' on page 1149. View full abstract»

• A touch smaller

Publication Year: 2010, Page(s): 1095
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A piezoresistive tactile sensor with very compact circuitry based on only one integrated chip has been created by colleagues at the University of Malaga in Spain. Their design uses a single programmable system-on-chip (PSoC) for the signal conditioning, rather than standard microcontrollers, making it suitable for space-restricted applications such as artificial hands. View full abstract»

• The heart of the matter

Publication Year: 2010, Page(s): 1096
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The reliable detection of low-intensity heart sounds in phonocardiogram (PCG) signals has been made possible with a new heart sound activity detection (HSAD) method. Dr. M. Sabarimalai Manikandan and Professor K.P. Soman from the Centre for Excellence in Computational Engineering and Networking, Amrita Vishwa Vidyapeetham in India, have developed a robust algorithm that can detect not only the lou... View full abstract»

• Band-notched ultra-wideband monopole antenna using coupled resonator

Publication Year: 2010, Page(s):1099 - 1100
Cited by:  Papers (2)
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A 5.2 GHz band-notched ultra-wideband monopole antenna using a proximity coupled resonator is proposed. Compared with conventional methods which transform antenna/ground structures to achieve band-notches, the proposed monopole antenna uses a coupled resonator to obtain a band-notch at 5.2 GHz and does not change the antenna surface current distribution. Two layer substrates are used and the reson... View full abstract»

• Robust heart sound activity detection in noisy environments

Publication Year: 2010, Page(s):1100 - 1102
Cited by:  Papers (5)
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A novel and robust method for heart sound activity detection (HSAD) is presented. In this method, a new discriminative feature is developed based on the lag-1 autocorrelation coefficient and feature smoothing is introduced to identify the endpoints of low-level heart murmurs. Several experiments on a large scale phonocardiogram database show that the method significantly outperforms the other HSAD... View full abstract»

• 3ߝ10 GHz ultra-wideband low-noise amplifier with new matching technique

Publication Year: 2010, Page(s):1102 - 1103
Cited by:  Papers (1)
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A low-power and low-noise amplifier with a new input matching technique using 0.18 μm CMOS technology for ultra-wideband applications is presented. A proposed broadband input match can be acquired easily by selecting an appropriate width of the transistor, which will effectively avoid the usage of the low-Q on-chip inductors in the input network. Moreover, demonstrated is the feasibility of... View full abstract»

• Improved DAC driving scheme for OFDM applications

Publication Year: 2010, Page(s):1103 - 1105
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Presented is a 'Redundant Signed Digit' driving scheme for binary weighted D/A conversion. This scheme retains the simplicity of conventional binary weighted D/A conversion, but has greatly improved robustness with regard to parasitic effects, especially when processing signals with a high crest factor. Such signals occur in communication systems that use, e.g. orthogonal frequency-division multip... View full abstract»

• Bulk-compensated technique and its application to subthreshold ICs

Publication Year: 2010, Page(s):1105 - 1106
Cited by:  Papers (4)
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A bulk-compensated technique to reduce process-related sensitivity in subthreshold integrated circuits (ICs) is presented. The bulk-compensated technique builds up a 'detecting-feedback' loop, and achieves effective compensation for the process-related fluctuation of MOS transistors through bulk potential modulation, which greatly enhances the stability and robustness of subthreshold ICs. A bulk-c... View full abstract»

• Design of waveguide bandpass filter based on nonresonating 'T' junctions

Publication Year: 2010, Page(s):1107 - 1108
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A design method for waveguide bandpass filters based on nonresonating T junctions is presented. The wideband characteristics of the nonresonating waveguide T junction are fully considered in the design method. As a design example, a four-pole waveguide bandpass filter with about 6` fractional bandwidth has been designed and fabricated. The measured results agree well with the calculated result... View full abstract»

• Digital frequency modulation profile for low jitter spread spectrum clock generator

Publication Year: 2010, Page(s):1108 - 1110
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A new digital frequency modulation profile is presented for the design of a low jitter spread spectrum clock generator (SSCG). By using this proposed frequency modulation profile, the clock jitter due to frequency modulation can be significantly reduced. Simulation shows that the jitter is reduced from 0.29 to 0.065UI if the proposed frequency modulation profile is adopted. For the simulation, a 4... View full abstract»

• Digital noise shaping multibit delta-sigma modulator

Publication Year: 2010, Page(s):1110 - 1111
Cited by:  Papers (1)
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A general single-loop multibit delta-sigma modulator is proposed. To reduce the sensitivity of the modulator performance to the nonlinearity of the multibit feedback DAC, a digital loop filter is used to shape the mismatch noise of the DAC. Simulation results show that this modulator not only has good stability but also shapes the quantisation noise and the mismatch noise at the same order. View full abstract»

• EMI susceptibility in bulk-driven Miller opamp

Publication Year: 2010, Page(s):1111 - 1113
Cited by:  Papers (5)
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A simple bulk-driven Miller amplifier is proposed. Along with the main operational amplifier (opamp) characteristics, the EMI susceptibility has also been investigated. The common nonlinearity problem of bulk-driven opamp architectures has been investigated and solved. The solution reduces also the EMI susceptibility. The proposed opamp has been designed in a 0.35 μm standard CMOS process; ... View full abstract»

• Increase of immunity of microcontroller to conducted continuous-wave interference by detection method

Publication Year: 2010, Page(s):1113 - 1114
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A simple interference detection method is presented. Different software methods are used to increase the immunity of a microcontroller according to the detection results. View full abstract»

• Low-power parasitic-insensitive switched-capacitor integrator for delta-sigma ADCs

Publication Year: 2010, Page(s):1114 - 1116
Cited by:  Papers (2)
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A low-power parasitic-insensitive switched-capacitor (SC) integrator is proposed for ΔΣ ADCs. Compared to the conventional SC integrator, the new one achieves much lower power dissipation for the same sampling noise specification. A cancellation technique is used to reduce the nonlinearity of the integrator. An effective ΔΣ ADC topology is described which can incorporat... View full abstract»

• Synchronising logic gates for wave-pipelining design

Publication Year: 2010, Page(s):1116 - 1117
Cited by:  Papers (2)
| | PDF (120 KB)

Synchronising logic gates (SLGs) used for a wave-pipelining design are presented. An SLG is a dual-rail logic gate which has an almost constant gate delay and can be used as an intermediate latch to synchronise data paths. Based on the SLGs, the wave-pipelining circuits are easily designed without complicated timing analysis. To evaluate the SLGs, an 8 × 8 multiplier is designed using a 90 ... View full abstract»

• Tactile sensor hardware based on programmable SoC

Publication Year: 2010, Page(s):1117 - 1118
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This reported work focuses on the implementation of data acquisition electronics for a piezoresistive tactile sensor. It commonly involves the use of quite bulky electronics not very suitable to be housed in artificial hands, for instance. A very compact implementation because it is not based on a conventional microcontroller but on a programmable system-on-chip (SoC) is presented. This device imp... View full abstract»

• Fast current programming method using current amplifier for active matrix organic light emitting diode displays

Publication Year: 2010, Page(s):1118 - 1120
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A fast and accurate current programming method with a current unity-gain amplifier which provides high gain and driving capability has been designed. Experimental results show that the maximum error of the programming current in pixels is less than 0.22 least significant bit using the proposed current driving method and the lowest grey-level current, 6.7 nA, can be successfully programmed within 1... View full abstract»

• Appearance-based mapping and localisation using feature stability histograms

Publication Year: 2010, Page(s):1120 - 1121
Cited by:  Papers (1)
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Proposed is an appearance-based mapping and localisation method based on the human memory model, which is used to build a feature stability histogram (FSH) at each node in the robot topological map. FSH registers local feature stability over time through a voting scheme, and most stable features are considered for mapping and Bayesian localisation. Experimental results are presented using omnidire... View full abstract»

• Image segmentation based on modified graph-cut algorithm

Publication Year: 2010, Page(s):1121 - 1123
Cited by:  Papers (6)
| | PDF (199 KB)

The regularising parameter of the energy function in the graph-cut based image segmentation methods should be carefully determined since it strongly affects the image segmentation result. Presented is a modified graph-cut technique using a novel energy function without the regularising parameter for image segmentation. In addition, a mixture colour model is employed to apply the proposed technique... View full abstract»

• Residue data prediction algorithm for efficient video compression

Publication Year: 2010, Page(s):1123 - 1124
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A novel residue data prediction algorithm to improve video coding efficiency is presented. The proposed algorithm performs an additional second prediction to remove the remaining signal correlation after the first prediction. Simulation results show that the proposed algorithm can reduce bit rate by up to 8.01% compared with the JM reference software without any degradation of the peak-signal-to-n... View full abstract»

• Boosting performance of multi-user Tomlinson-Harashima precoding

Publication Year: 2010, Page(s):1124 - 1126
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In the precoding matrices of the best-known multi-user Tomlinson-Harashima precoder, only the sum of noise powers of all users is used; information on the individual users' powers is thus under-utilised. A method is proposed to take into account the individual noise powers of users in the precoding matrices for system-wise performance optimisation, while users' noise powers may not be explicitly f... View full abstract»

• Pseudo-noise code regeneration based on noncommensurate sampling and dynamic clock phase shifting

Publication Year: 2010, Page(s):1126 - 1127
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A pseudo-noise code regeneration method is proposed to break through the regeneration accuracy limit incurred by digital implementation. In this method, noncommensurate sampling is used to obtain subsample time-delay difference distinguishability, which is then employed to adjust the phase of the clock driving code regeneration using the dynamic fine phase shift capability of state-of-the-art FPGA... View full abstract»

• Very efficient correlator for loosely synchronised codes

Publication Year: 2010, Page(s):1127 - 1129
Cited by:  Papers (2)
| | PDF (198 KB)

A new approach for the efficient correlation of loosely synchronised (LS) codes, when they are generated from Golay pairs, is presented. By employing this new approach, the total number of operations to be performed in the correlation is notably decreased, if compared with existing proposals based on classical efficient Golay correlators or straightforward methods. The proposed correlator can be e... View full abstract»

• Bent SMS fibre structure for temperature measurement

Publication Year: 2010, Page(s):1129 - 1130
Cited by:  Papers (4)
| | PDF (182 KB)

A temperature sensor fabricated using a bent singlemode-multimode-singlemode (SMS) fibre structure is presented. Experimental results show, that compared to a sensor based on a straight SMS fibre structure, this temperature sensor has a much higher sensitivity of 31.97 pm/°C over a temperature range from 20 to 80°C, based on the measurement of the mean 3 dB wavelength shift, and offe... View full abstract»

Aims & Scope

Electronics Letters is internationally renowned for its rapid communication of new developments and emerging topics across the broad and interdisciplinary field of modern electronics and electrical engineering.

Full Aims & Scope

Meet Our Editors

Editors-in-Chief

Professor Chris Toumazou
Director of the Biomedical Institute
Imperial College, London, UK

Professor Ian White