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Electronics Letters

Issue 18 • September 1 2011

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Displaying Results 1 - 25 of 32
  • In Brief

    Publication Year: 2011, Page(s): 1006
    IEEE is not the copyright holder of this material | PDF file iconPDF (678 KB)
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  • Interview

    Publication Year: 2011, Page(s): 1006
    IEEE is not the copyright holder of this material | PDF file iconPDF (254 KB)
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  • A new spin on the MOSFET

    Publication Year: 2011, Page(s): 1007
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (409 KB)

    Highly efficient power-gating systems beyond conventional CMOS technology could be realised using a new non-volatile flip-flop design based on a 'pseudo-spin-MOSFET' (PSMOSFET), researchers in Japan have shown. The non-volatile flip-flop architecture is faster and uses less power than other backup architectures using ordinary flip-flops, and is compatible with existing CMOS fabrication and circuit... View full abstract»

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  • A VECSEL worth its salt

    Publication Year: 2011, Page(s): 1008
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (212 KB)

    Vertical external cavity surface emitting laser (VECSEL) that has a continuous tuning over 3.22 to 3.3 μm at temperatures up to 5°C has been demonstrated. This PbSe quantum well VECSEL, developed for hydrocarbon absorption spectroscopy, is one of a range of lead-salt-based VECSELs from a team at ETH Zurich, Switzerland, for mid-IR applications in the 2.5-10 μm wavelength range... View full abstract»

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  • Ultrasound beamformer using pipeline-operated S/H delay stages and charge-mode summation

    Publication Year: 2011, Page(s):1011 - 1012
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (233 KB)

    The proposed ultrasound beamformer is based on the delay-and-sum beamforming principle. The circuit consists of several programmable delay lines. Each delay line is constructed by pipeline-operated sample-and-hold (S/H) stages with digitally-assisted delay control, which ensure delay-independent gain and good timing accuracy. The summation is realised in the charge domain using the charge-averagin... View full abstract»

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  • BCB film based SAW humidity sensor

    Publication Year: 2011, Page(s):1012 - 1014
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (280 KB)

    Novel benzocyclobutene (BCB) film based surface acoustic wave (SAW) humidity sensors were successfully designed and fabricated. A sensitivity of 0.26 dB/RH was successfully demonstrated between 8.6 and 90.6 relative humidity (RH), with a linear relationship between RH level and resonance amplitude. The temperature stability of resonance frequency and amplitude has also been studied. View full abstract»

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  • Effect of urban environment on propagation of medium waves

    Publication Year: 2011, Page(s):1014 - 1015
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (184 KB)

    Proposed is a correction in the model adopted by Recommendation P.368-9 to consider the effect of the urban environment on the propagation of medium waves. The proposed method uses information of the area occupied by buildings to represent the city, and was developed based on measurements made in São Paulo, Brazil. It was tested through comparisons with measurements made in São Pau... View full abstract»

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  • Non-lithographically microfabricated capacitive pressure sensor for biomedical applications

    Publication Year: 2011, Page(s):1015 - 1017
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (294 KB)

    A novel micromachined capacitive pressure sensor fabricated on a metal substrate without using a photolithographic process is reported. The device is constructed by thermal bonding of a Parylene membrane onto a 1.5 × 1.5 × 0.2×mm3 stainless-steel chip with a shallow cavity created using micro-electro-discharge machining. The fabrication approach enables rapid, low-c... View full abstract»

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  • Lossy compression of EEG signals using SPIHT

    Publication Year: 2011, Page(s):1017 - 1018
    Cited by:  Papers (10)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (188 KB)

    A method of compressing electroencephalographic signals using the set partitioning in hierarchical trees (SPIHT) algorithm is described. The signals were compressed at a variety of different compression ratios (CRs), with the loss of signal integrity at each CR determined using the percentage root-mean squared difference between the reconstructed signal and the original. An analysis of the computa... View full abstract»

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  • Highly-linear rail-to-rail 1.2 V-0.18μm CMOS V-I converter

    Publication Year: 2011, Page(s):1018 - 1019
    Cited by:  Papers (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (116 KB)

    Presented is a new high-performance CMOS V-I converter based on an OTA/common source amplifier configuration. To achieve rail-to-rail operation, the voltage across the linear V-I conversion resistor is reduced by means of local feedback, thereby keeping the output mirroring transistor in saturation over the entire input voltage range. Experimental results for a 1.2 V-0.18 μm CMOS design con... View full abstract»

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  • Tunable active bandpass filter design

    Publication Year: 2011, Page(s):1019 - 1021
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (273 KB)

    A tunable active bandpass filter that uses control voltage to select passband frequency response is presented. The proposed topology basically consists of a cascoded current-injection active inductor so as to tune passband frequency response from 2.35 to 3.66 GHz and extend the available bandwidth. View full abstract»

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  • 1F ESD protection device for gigahertz high-frequency output ESD protection

    Publication Year: 2011, Page(s):1021 - 1022
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (330 KB)

    A mutual-protection scheme is proposed to achieve an ultra-low capacitance electrostatic discharge (ESD) protection device. The ESD protection device can not only dissipate ESD current, but also can make the vulnerable output transistor have the ESD protection capability. Namely, the output transistor can also protect ICs and help the ESD protection device to share the ESD current. Using this sche... View full abstract»

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  • Class-driven Bayesian background modelling for video object segmentation

    Publication Year: 2011, Page(s):1023 - 1024
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (373 KB)

    A background subtraction video segmentation algorithm that works by modelling the different appearances of a pixel in a set of independent layers is proposed. The main contribution of this work with respect to the existing approaches is the use of an a priori classification scheme that classifies the pixel before updating the background model. This scheme isolates the pixel instances that b... View full abstract»

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  • Mean representation based classifier with its applications

    Publication Year: 2011, Page(s):1024 - 1026
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (57 KB)

    Based on a fundamental concept that most similar properties of samples from a single-object class should be congregated on their class mean, an efficient and simple approach for pattern identification, called the mean representation based classifier (MRC), is presented. MRC is a linear model representing a testing sample as a linear combination of all class means and the class associating the bigg... View full abstract»

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  • Search algorithm based on information diffusion for unstructured peer-to-peer networks

    Publication Year: 2011, Page(s):1026 - 1027
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (191 KB)

    Proposed is a search algorithm based on information diffusion for effectively searching resource in a dynamic unstructured peer-to-peer network. The learning phase for the resource changes could be accelerated in the network while still maintaining high accuracy. An improved performance compared with the adaptive probabilistic search algorithm is demonstrated in terms of search efficiency, success... View full abstract»

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  • Nonvolatile delay flip-flop using spin-transistor architecture with spin transfer torque MTJs for power-gating systems

    Publication Year: 2011, Page(s):1027 - 1029
    Cited by:  Papers (11)  |  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (182 KB)

    The power-gating (PG) ability of the authors' previously proposed nonvolatile delay flip-flop (NV-DFF) using pseudo-spin-transistors with spin transfer torque magnetic tunnel junctions (STT-MTJs) is computationally analysed. Break-even time (BET) for nonvolatile logic circuits, which is an important index of energy performance for PG systems, is also formulated for the first time. The BET of the p... View full abstract»

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  • Current-reused divide-by-3 injection-locked frequency divider in 65 nm CMOS

    Publication Year: 2011, Page(s):1029 - 1030
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (230 KB)

    A current-reused divide-by-3 injection-locked frequency divider (ILFD) is realised in a 65 nm CMOS process. This divide-by-3 ILFD achieves the input locking range from 117.45 to 118.38 GHz and its power consumption is 12 mW for a supply of 1.3 V excluding buffers and the biasing circuit. This divide-by-3 ILFD achieves the higher operational frequency and lower power dissipation. View full abstract»

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  • Characterisation of composite right/left-handed transmission line

    Publication Year: 2011, Page(s):1030 - 1032
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (225 KB)

    A composite right/left-handed transmission line (CRLH TL) and its equivalent circuit model is proposed based on the cascaded complementary single split ring resonator (CCSSRR). The circuit analysis based on Bloch theory is performed to characterise the balanced condition, whereas the constitutive electromagnetic parameters are extracted to demonstrate the negative refractive index (NRI) and propag... View full abstract»

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  • Applications of shunt open stubs in filter design

    Publication Year: 2011, Page(s):1032 - 1033
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (244 KB)

    The asymmetric half-wavelength resonator filter with shunt open stubs is analysed. Compared with the filter without shunt open stubs, two applications of shunt open stubs are obtained. First, it can be used for miniaturisation of the filter; secondly, the second passband can be obtained by it. To verify the analysis above, filters with and without shunt open stubs have been fabricated. The centre ... View full abstract»

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  • Ultra-wideband differential bandpass filter based on transversal signal-interference concept

    Publication Year: 2011, Page(s):1033 - 1035
    Cited by:  Papers (24)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (250 KB)

    A new microstrip ultra-wideband (UWB) differential bandpass filter using two broadband planar Marchand baluns is proposed. Based on the transversal signal-interference concept, a passband with adjustable fractional bandwidth from 80 to 124% can be achieved for the differential mode, while the common mode can easily be suppressed in the whole frequency band. Good agreement is observed between simul... View full abstract»

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  • 30 Gbit/s, 850 nm, VCSEL-based optical link

    Publication Year: 2011, Page(s):1035 - 1036
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (226 KB)

    A complete 30 Gbit/s VCSEL link is reported. The driver and receiver amplifiers were fabricated in a 0.13 m SiGe BiCMOS process and the 850 nm VCSELs and photodetectors are commercial 10 Gbit/s-class components. Transmitter pre-emphasis applied through the feed-forward equaliser circuit enables the full link to operate at 30 Gbit/s at a bit error ratio less than 10-12 with a 9 dB link b... View full abstract»

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  • Carrier-suppressed single photoreceiver optical balanced detector

    Publication Year: 2011, Page(s):1036 - 1037
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (170 KB)

    A truly optical balanced detection (OBD) with a single photoreceiver instead of two for suppressing excess noise is experimentally demonstrated. The proposed OBD not only rejects common noise, but also it enables the interferometer to operate as a double sideband suppressed carrier and at dark fringe so that quantum noise limited phase detection is possible. View full abstract»

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  • Continuously tunable singlemode VECSEL at 3.3μm wavelength for spectroscopy

    Publication Year: 2011, Page(s):1037 - 1039
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (230 KB)

    A singlemode tunable vertical external cavity surface emitting laser (VECSEL) has been realised. The VECSEL can be tuned continuously over more than 80 nm from ~3.22 to 3.3μm wavelength. Tuning is performed by changing the cavity length with a piezoelectric driver. Covering this wavelength range allows various potential applications, especially for gas spectroscopy of organic compounds. The... View full abstract»

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  • High peak-power nanosecond pulses generated with DFB RW laser

    Publication Year: 2011, Page(s):1039 - 1040
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (619 KB)

    The generation of optical pulses with very high-peak power by gain-switching of a distributed-feedback (DFB) ridge-waveguide (RW) laser emitting at a wavelength of 1064 nm is demonstrated. With 4 ns-long pulses a peak power of 2.6 W is achieved at a repetition frequency of 250 kHz. The rise and fall times of the pulses are about 1.2 ns. The spectral full width at half maximum ranges between 30 and... View full abstract»

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  • Simple theoretical approach for spectral properties of Rayleigh backscattering feedback fibre lasers

    Publication Year: 2011, Page(s):1040 - 1042
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (59 KB)

    The reflecting spectral properties of a long low-loss singlemode fibre subject to randomly distributed Rayleigh backscattering feedback are theoretically analysed from the optical beat produced when two-frequency light is input into the fibre. The theoretical results can well explain the recent experimental observations on all-fibre cavity lasers that are featured by the broad continuum of multipl... View full abstract»

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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
Head of Photonics Research
University of Cambridge, UK