By Topic

Electronics Letters

Issue 14 • Date July 2010

Filter Results

Displaying Results 1 - 25 of 52
  • In brief

    Publication Year: 2010 , Page(s): 960
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (132 KB)  

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • The coin's edge

    Publication Year: 2010 , Page(s): 960
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (94 KB)  

    First Page of the Article
    View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Interview

    Publication Year: 2010 , Page(s): 961
    Save to Project icon | PDF file iconPDF (394 KB)  
    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Forming a bond

    Publication Year: 2010 , Page(s): 962
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (193 KB)  

    A new way to fabricate III-V devices on a glass substrate has been demonstrated by a team at Chalmers University of Technology in Sweden. Their epitaxial procedure, which uses anodic bonding, preserves the electrical characteristics of the device and shows great potential as a simple technique for integrated microwave and photonics applications. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Quantum communication technology

    Publication Year: 2010 , Page(s): 965 - 967
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (139 KB)  

    Quantum communication is built on a set of disruptive concepts and technologies. It is driven by fascinating physics and by promising applications. It requires a new mix of competencies, from telecom engineering to theoretical physics, from theoretical computer science to mechanical and electronic engineering. First applications have already found their way into niche markets, and university labs ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Compact CPW-fed ultra-wideband antenna with dual band-notched characteristics

    Publication Year: 2010 , Page(s): 967 - 968
    Cited by:  Papers (8)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (348 KB)  

    A coplanar-waveguide (CPW)-fed ultra-wideband antenna with dual band-notch characteristic is presented. The antenna is as small as 21 × 28 × 1.6 × mm3. The proposed antenna yields an impedance bandwidth of 3.1-10.6-GHz with VSWR-2, except for the bandwidth of 5-6-GHz for WLAN and 7.7-8.5-GHz for X-band. The antenna has been successfully simulated, fabricated and mea... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Design of microstrip patch antenna using novel U-shaped feeding strip with unequal arm

    Publication Year: 2010 , Page(s): 968 - 970
    Cited by:  Papers (4)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (341 KB)  

    A novel feeding technique is developed for the microstrip patch antenna. The U-shaped feeding strip with an unequal arm is proposed to feed a printed rectangular ring patch antenna to achieve high gain. Measured results of the prototype antenna agree very well with simulated results. According to the measured results, the antenna shows good impedance bandwidths satisfying ISM 2.45/5.8 GHz with goo... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Dual-band circularly-polarised antenna based on complementary two turns spiral resonator

    Publication Year: 2010 , Page(s): 970 - 971
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (299 KB)  

    A novel dual-band circularly-polarised microstrip antenna is proposed. The designs are based on the complementary two turns spiral resonator (CSR2). They are the counterparts of two turns spiral resonators (SR2s), which were introduced in 2004 by some of the present authors. The CSR2 technique can be applied to the design of miniaturised antenna by increasing electrical length. To demonstrate the ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Loaded split ring antenna over AMC

    Publication Year: 2010 , Page(s): 971 - 972
    Cited by:  Papers (4)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (162 KB)  

    A split ring antenna loaded with lumped element capacitors is presented measuring λ/9 at 450 MHz. It is placed over a small artificial magnetic conductor (AMC) to form a very compact, conformal platform tolerant antenna. The overall thickness of the structure is just 15.2 mm which is 1/44 of a wavelength at 450 MHz. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • 14.4 nW fourth-order bandpass filter for biomedical applications

    Publication Year: 2010 , Page(s): 973 - 974
    Cited by:  Papers (4)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (196 KB)  

    A bandpass biquad with ultra low power consumption suitable for biomedical applications is proposed. In this biquad, one zero and two complex poles are synthesised in a single differential stage. An all-PMOS fourth-order Butterworth prototype comprising two such biquads has been fabricated in 0.18 μm CMOS process. The measured passband is from 523 to 1024 HZ, and it consumes only 14.4 nA un... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • ± 1V high frequency four quadrant current multiplier

    Publication Year: 2010 , Page(s): 974 - 976
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (151 KB)  

    A high frequency four quadrant current multiplier is presented. The current multiplier uses complementary MOS devices in the triode region and exploits the square-law behaviour of saturated MOS transistors. The circuit operates using the supply voltages of ±1V. The cutoff frequency is 1.74± GHz with a total harmonic distortion less than 0.065 ± (at 1±MHz). The power dis... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Low-voltage bandgap reference with output-regulated current mirror in 90 nm CMOS

    Publication Year: 2010 , Page(s): 976 - 977
    Cited by:  Papers (3)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (181 KB)  

    A low-voltage bandgap reference (BGR) circuit is designed and fabricated in a 90 nm CMOS technology. To mitigate error resulting from the mismatch in temperature dependency of the current in the output current mirror device and that of the BGR core, an output-regulated current mirror is incorporated. Experimental results show that the output voltage is 497.2 mV at 25οC with a tem... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Single-stage class AB operational amplifier for SC circuits

    Publication Year: 2010 , Page(s): 977 - 979
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (410 KB)  

    A single-stage class AB multipath operational amplifier is presented. The proposed amplifier uses the previously idle devices in a folded-cascode amplifier in the signal path and a flipped-voltage follower cell to build the class AB operation. It results in enhanced unity-gain bandwidth and DC gain and large slew rate with the same power consumption as the folded-cascode amplifier. Circuit level a... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Frequency synthesis using digital-to-frequency conversion and filtering

    Publication Year: 2010 , Page(s): 979 - 980
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (150 KB)  

    A novel topology for frequency synthesis using digital-to-frequency conversion and a filtering technique is presented. The implementation uses a high-order digital sigma-delta modulator to encode a DC value, which is then mapped to a corresponding frequency using a digital-to-frequency conversion algorithm. The output bit-sequence with the sigma-delta encoded frequency is then applied to a high-or... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Frequency-adaptive voltage sequence estimation for grid synchronisation

    Publication Year: 2010 , Page(s): 980 - 982
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (243 KB)  

    Grid synchronisation is one of the most important issues for integration of distributed generation into the grid. A challenge for grid synchronisation is how to quickly and precisely estimate the fundamental positive and negative sequence voltages under distorted and unbalanced conditions. A decoupled double complex-coefficient-filter based grid synchronisation method is proposed. It has a very si... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Low cost and low power open-loop frequency synthesiser

    Publication Year: 2010 , Page(s): 982 - 984
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (243 KB)  

    A fully integrated frequency synthesiser based on a low-cost and low-power multifunctional phase-locked loop (PLL) is proposed for frequency shift keying applications. The optimised open-loop modulation circuit and its digital control module are detailed. The 0.166 mm2 synthesiser is implemented in a 0.28 μm CMOS technology with 2.5 V supply voltage. Measurement results related t... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Monitoring circuit based on threshold for fault-tolerant NoC

    Publication Year: 2010 , Page(s): 984 - 985
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (147 KB)  

    As CMOS technology continues to scale down, reliability has become one of the most crucial issues in network-on-chip (NoC). A novel NoC monitoring circuit based on fault thresholds is proposed. This circuit is able to distinguish not only transient faults but also non-transient faults in NoC data links and routers with low area and power overhead. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Shadow filters generalisation to nth-class

    Publication Year: 2010 , Page(s): 985 - 986
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (266 KB)  

    The theory of shadow filters, a new family of second-order filters recently introduced, is extended to class n filters, where n is a positive integer. It is shown that their centre frequency f0An is given by f0An=f0(1-A)n/2 where f0 is the centre frequency of the starting unity gain filter and A the gain of amplifiers. Simulation result... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Shadowed register cell for skew-resistant timing

    Publication Year: 2010 , Page(s): 987 - 988
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (148 KB)  

    A shadowed register cell with controllable latency for synthesis of synchronous systems with large clock skewing is presented. Arbitrary delays in clock distribution allow peak supply current reduction in a much wider range than is possibly achieved by means of standard registers. This is put in use to trade clock cycle time for I*R voltage drops and switching noise shaping in mixed analogue-digit... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Ultra-lightweight true random number generators

    Publication Year: 2010 , Page(s): 988 - 990
    Cited by:  Papers (3)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (215 KB)  

    A series of ultra-lightweight digital true random number generators (TRNGs) are presented. These TRNGs are based on the observation that, when a circuit switches from a metastable state to a bi-stable state, the resulting state may be random. Four such circuits with low hardware cost are presented: one uses an XOR gate; one uses a lookup table; one uses a multiplexer and an inverter; and one uses ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • VCO with Miller theorem-based varactors

    Publication Year: 2010 , Page(s): 990 - 991
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (255 KB)  

    An inductor-capacitor voltage controlled oscillator (LC VCO) using Miller theorem-based varactors is presented in 90 nm CMOS technology for low-voltage applications. The VCO tuning range is effectively enhanced by incorporating a capacitive shunt-shunt feedback amplifier. Dissipating 3 mW from a 0.7 V supply, the VCO exhibits a phase noise of -111 dBc/Hz at 1 MHz offset from the oscillation freque... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • LQR gain-schedule controller for vertical line following

    Publication Year: 2010 , Page(s): 991 - 993
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (137 KB)  

    A novel guidance controller for UAVs to follow a line in the vertical plane based on the well-known linear quadratic regulator (LQR) theory is proposed. Robustness margins are derived based on Lyapunov stability analysis, and an efficient way to design the controller using performance prediction is suggested. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Tessellation of plane with magnetic landmarks for pose control and global localisation

    Publication Year: 2010 , Page(s): 993 - 995
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (565 KB)  

    Proposed are regular tessellations of the plane environment where various patterns of magnetic landmarks are arranged in repeated configurations for fine pose tracking control and global localisation of mobile robots. Mobile robots sense the magnetic field with embedded magnetic Hall sensors and can recognise the pattern of the landmark. In the experiments, the accuracy of pose control of a mobile... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Long time stable compact fourth-order scheme for time domain Maxwell's equations

    Publication Year: 2010 , Page(s): 995 - 996
    Cited by:  Papers (1)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (113 KB)  

    A compact staggered backward differentiation method (CSBD(4,4)) is proposed. Theoretical analyses of numerical stability and dispersion are straightforward, and comparisons with the staggered backward differentiation method (SBD(4,4)) are provided. It shows that the numerical dispersion of the proposed scheme is greatly reduced. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Structured local binary Haar pattern for pixel-based graphics retrieval

    Publication Year: 2010 , Page(s): 996 - 998
    Cited by:  Papers (2)
    Save to Project icon | Click to expandAbstract | PDF file iconPDF (366 KB)  

    A feature, named structured local binary Haar pattern (SLBHP), is proposed for pixel-based graphics retrieval. The SLBHP is a hybrid of local binary pattern (LBP) and Haar wavelet. The SLBHP encodes the polarity rather than the magnitude of the difference between accumulated grey values of adjacent rectangles. The polarity relationships are then considered as a binary value as in LBP. Experimental... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

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