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# Electronics Letters

## Filter Results

Displaying Results 1 - 25 of 46
• ### In brief

Publication Year: 2012, Page(s): 1170
| PDF (107 KB)
• ### Interview

Publication Year: 2012, Page(s): 1170
| PDF (145 KB)
• ### Under pressure

Publication Year: 2012, Page(s): 1171
| PDF (343 KB)
• ### Fields ripe for harvest

Publication Year: 2012, Page(s): 1172
| PDF (216 KB)
• ### Compact ultra-wideband antenna with reconfigurable notched bands

Publication Year: 2012, Page(s):1175 - 1176
Cited by:  Papers (4)
| | PDF (587 KB)

A reconfigurable band-notched ultra-wideband antenna is proposed. The antenna mainly consists of a modified rectangle radiating element, a staircase ground plane and two simple pin diode switches, and its entire size is 33.0×28.0×1.0mm. The presented antenna has nearly omnidirectional patterns, stable gain, small group delay and an available impedance bandwidth ranging from 3.... View full abstract»

• ### Broad beamwidth circular polarisation antenna: Microstrip-monopole antenna

Publication Year: 2012, Page(s):1176 - 1178
Cited by:  Papers (6)
| | PDF (446 KB)

A novel broad beamwidth circular polarisation antenna called a microstrip-monopole antenna (MMA) is proposed. By loading four cylinders which are perpendicular to the substrate of the microstrip antenna near the edge of a circular patch, broad beamwidth is achieved. Using this simple method, the MMA is invented. The 3 dB beamwidth of the MMA is about 156 at central frequency, which is 110 wider th... View full abstract»

• ### Lateral field excited film bulk acoustic resonator for detection of protein-ligand interactions

Publication Year: 2012, Page(s):1178 - 1179
| | PDF (240 KB)

Presented is a lateral field excited film bulk acoustic resonator for real-time sensing of protein-ligand interaction using the biotin-streptavidin system as a model. The film bulk acoustic resonator works at 2 GHz in shear mode. For biosensing, the biotin was immobilised on one face of the resonator as the probe. The resonant frequency of the biotin-immobilised device drops rapidly at first and g... View full abstract»

• ### Antenna system applicable to microwave non-invasive hyperthermia lipolysis

Publication Year: 2012, Page(s):1179 - 1181
Cited by:  Papers (1)
| | PDF (330 KB)

Presented is an antenna system for microwave non-invasive hyperthermia lipolysis. The antenna system consists of a circular waveguide antenna radiating electromagnetic waves, an AlN (aluminium nitride) radome, and a heat sink. The AlN radome with the heatsink helps to extract heat from the skin so that the skin temperature does not rise during hyperthermia lipolysis. The antenna was designed to be... View full abstract»

• ### Rectigulator: A hybrid of rectifiers and regulators for miniature wirelessly powered bio-microsystems

Publication Year: 2012, Page(s):1181 - 1182
Cited by:  Papers (1)
| | PDF (261 KB)

At present, the existence of power decoupling capacitors is a bottleneck for the miniaturisation of wirelessly powered biomedical implants. To reduce the area of on-chip or off-chip decoupling capacitors, a new circuitry is proposed, called the rectigulator. By using two negative feedback channels in turn, the rectigulator directly converts an AC input to a well regulated DC output. Accordingly,... View full abstract»

• ### Ultrasonic image fusion using compressed sensing

Publication Year: 2012, Page(s):1182 - 1184
Cited by:  Papers (2)
| | PDF (242 KB)

Presented is a new approach to fuse the fundamental ultrasonic image and second-harmonic ultrasonic image using compressed sensing. First, source image compressed measurements are obtained by star-shaped sampling mode in the 2D Fourier plane. The measurements are fused into fused measurements by the adaptive weighted average fusion scheme. The fused image is then reconstructed from the fused measu... View full abstract»

• ### Digital compensator for large phase-error glitches in digital PLL

Publication Year: 2012, Page(s):1184 - 1185
| | PDF (447 KB)

Proposed is a digital compensator that is employed in a digital phase-locked loop (PLL) to avoid big phase-error downfalls caused by the large output glitches originating from a high-speed counter based on standard logic cells. The proposed compensation mechanism enables the PLL to acquire a desired frequency under irregular voltage and temperature. View full abstract»

• ### Area-efficient and ultra-low-power architecture of RSA processor for RFID

Publication Year: 2012, Page(s):1185 - 1187
Cited by:  Papers (4)
| | PDF (142 KB)

Presented is an area-efficient and ultra-low-power hardware architecture of a 1024-bit RSA processor using a modified Montgomery algorithm. Since RSA for RFID often offers authentication and data encryption, small area, low power and high speed are its final goal. Proposed is the following progress: 1. to improve the Montgomery algorithm including preprocessing and Montgomery multiplication; 2. to... View full abstract»

• ### Continuous time Δ Σ modulation with PWM pre-coding and binary gm blocks

Publication Year: 2012, Page(s):1187 - 1188
Cited by:  Papers (4)
| | PDF (208 KB)

A very simple technique to implement the first integrator of a continuous-time delta sigma modulator (CT-DSM) is presented. In the approach, the CT-DSM is preceded by a pulse-width modulator to convert the input signal to a pseudo-digital continuous time waveform. As a result, the first integrator of the DSM can be implemented with a capacitor and a switched current source, with inherent linearity... View full abstract»

• ### Convergence time analysis of open shortest path first routing protocol in internet scale networks

Publication Year: 2012, Page(s):1188 - 1190
Cited by:  Papers (3)
| | PDF (283 KB)

Proposed is a novel method to compute the intra-area convergence time of open shortest path first (OSPF) based networks in the presence of designated routers (DRs) on Ethernet and non-broadcast multi-access segments. The capacity of the proposed method is demonstrated by evaluating the convergence time performance of OSFP on internet scale networks (having a thousand autonomous system level router... View full abstract»

• ### Design of latch-based C-element

Publication Year: 2012, Page(s):1190 - 1191
Cited by:  Papers (1)
| | PDF (154 KB)

The C-element logic gate is a key component for constructing asynchronous control in silicon integrated circuits. The purpose of this reported work is to introduce a new speed-independent C-element design, which is synthesised by the asynchronous Petrify design tool to ensure it is composed of sequential digital latches rather than complex gates. The benefits are that it guarantees correct speed-i... View full abstract»

• ### Low-power, low-phase-noise tuned-input tuned-output VCO with loop gain enhancement

Publication Year: 2012, Page(s):1192 - 1193
| | PDF (340 KB)

A negative conductance is proposed to compensate for the loss of an auxiliary LC tank at the drain of a conventional tuned-input tuned-output voltage-controlled oscillator (VCO). This conductance enhances the loop gain of the VCO. The DC current flowing through the negative conductance generator is reused by the VCO to save power. The proposed VCO is fabricated in a 0.18 μm 1P6M CMOS proces... View full abstract»

• ### Lumped triple-frequency impedance transformers

Publication Year: 2012, Page(s):1193 - 1194
Cited by:  Papers (2)
| | PDF (229 KB)

Presented is a lumped triple-frequency impedance transformer for impedance matching between real loads and real sources. A traditional L-network is used in this transformer with lumped circuit blocks realising needed susceptances and reactances at specified frequencies. Design formulas for lumped elements are deduced. A triple-frequency impedance transformer is designed to realise impedance matchi... View full abstract»

• ### Result-consistent counter sampling scheme for coarse-fine TDCs

Publication Year: 2012, Page(s):1195 - 1196
Cited by:  Papers (1)
| | PDF (226 KB)

A novel sampling scheme for coarse-fine time-to-digital converters (TDCs), whose architecture commonly comprises a synchronous counter as a coarse part and delay-line based phase interpolator as a fine part, is proposed. The presented approach eliminates any error in the coarse counter and is superior in terms of mean time between failures as well as complexity, area and power consumption in compa... View full abstract»

• ### Commercial piezoelectric unimorph diaphragm as a magnetic energy harvester

Publication Year: 2012, Page(s):1196 - 1198
| | PDF (246 KB)

A magnetoelectric coupling in a low-cost and commercially available piezoelectric unimorph diaphragm is demonstrated by measuring magnetically induced AC voltage from the sample. Such a magnetoelectric effect could be achieved only because of the combination of magnetic forces within the electrodes and piezoelectric effect, without any magnetic constituent. Harvested magnetic power density across ... View full abstract»

• ### Automatic moving object segmentation using histogram-based graph cut and label maps

Publication Year: 2012, Page(s):1198 - 1199
| | PDF (305 KB)

Presented is a novel object segmentation method using a histogram-based graph cut algorithm with automatically generated label maps. The proposed method consists of three steps including: (i) pre-processing, (ii) label map generation and update, and (iii) object segmentation. The pre-processing step over-segments the input image using the median filter-based watershed algorithm. The label map is g... View full abstract»

• ### Dense stereo-based critical area detection for active pedestrian protection system

Publication Year: 2012, Page(s):1199 - 1201
Cited by:  Papers (3)
| | PDF (269 KB)

An active pedestrian protection system is required to operate in real-time and produce an extremely low false alarm. To achieve these requirements, Broggi et al. detected critical areas using a laser scanner and found pedestrians only in these areas via a camera. However, using heterogeneous sensors requires a complicated system architecture and laser scanners have drawbacks in terms of ins... View full abstract»

• ### Fast CABAC rate estimation for H.264/AVC mode decision

Publication Year: 2012, Page(s):1201 - 1203
Cited by:  Papers (6)
| | PDF (172 KB)

Proposed is a fast context-adaptive binary arithmetic coding (CABAC) rate estimation method which can reduce the computational complexity of rate calculation for mode decision. The time-consuming CABAC rate calculation for mode decision is simplified by using a proposed look-up table indexed only by the probability state index and the most probable symbol. Experimental results show that the propos... View full abstract»

• ### Gradient directional pattern: A robust feature descriptor for facial expression recognition

Publication Year: 2012, Page(s):1203 - 1204
Cited by:  Papers (5)  |  Patents (1)
| | PDF (154 KB)

Presented is a novel local texture pattern, the gradient directional pattern (GDP), and an effective feature descriptor constructed with the GDP codes for facial expression recognition. The GDP operator encodes the texture information of a local region by quantising the gradient directional angles to form a binary pattern. The location and occurrence information of the GDP micro-patterns is then u... View full abstract»

• ### Proof of localisation properties of Harris corners

Publication Year: 2012, Page(s):1204 - 1206
| | PDF (225 KB)

It is known from the previous literature that a Harris corner is detected inside the real corner and on the bisector line of the corner angle at L-junction. Since a mathematical proof of the property has not been provided in the literature, and therefore one is presented in this Letter. View full abstract»

• ### 42.8 Gbit/s PAM-4 data transmission over low-loss electrical backplane

Publication Year: 2012, Page(s):1206 - 1208
Cited by:  Papers (1)
| | PDF (312 KB)

Demonstrated is a record serial transmission rate of 42.8 Gbit/s by sending four-level pulse amplitude modulated (PAM-4) data over a low-loss Megtron 6 electrical backplane. The data is processed and equalised using early late gate timing recovery and a finite-impulse-response-based least-mean-squares equaliser. Bit error rate performance is reported over several different links. 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