# Electronics Letters

## Filter Results

Displaying Results 1 - 25 of 61
• ### Easily compensated CMOS voltage buffer

Publication Year: 1999, Page(s):1947 - 1948
| |PDF (216 KB)

A frequency compensated 5 V CMOS voltage buffer is proposed. It is possible to increase the bandwidth of the buffer substantially using only one grounded capacitor which introduces a zero into the small-signal transfer function. Simulations based on a 2 μm n-well CMOS process have indicated that the 3 dB frequency of the buffer is beyond 700 MHz View full abstract»

• ### FDTD modelling of nonlinear spark in electrostatic discharge

Publication Year: 1999, Page(s):1897 - 1898
Cited by:  Papers (6)
| |PDF (200 KB)

An accurate numerical method for calculating nonlinear electrostatic discharges is presented. The method represents an improvement over the FDTD scheme in that it includes the arc model of Rompe and Weizel [1944]. Numerical results that demonstrate the validity and accuracy of the model are presented View full abstract»

• ### Passive, light intensity-independent interferometric method for fibre Bragg grating interrogation

Publication Year: 1999, Page(s):1970 - 1971
Cited by:  Papers (15)  |  Patents (3)
| |PDF (232 KB)

The authors describe a passive technique for sensing the strain-induced wavelength shift of a fibre Bragg grating (FBG) using a Mach-Zehnder interferometer that utilises a 3×3 coupler. Laboratory data show that a resolution of ~10 nε/√(Hz) RMS is achievable with inherent insensitivity to source intensity variations View full abstract»

• ### Analytical solution to diffraction problem in series of half-screens bounded by low-curvature surface

Publication Year: 1999, Page(s):1928 - 1929
| |PDF (208 KB)

An analytical solution to the radiowave diffraction problem in a series of half-screens bounded by a low-curvature surface is proposed. The approximate solution is expressed in terms of new special functions. The advantage of this method consists in the significant increase in the speed of computation achieved through preliminary determination of the special functions View full abstract»

• ### Advanced measurement techniques for generation of SPICE models of RFIC packages

Publication Year: 1999, Page(s):1945 - 1946
Cited by:  Papers (5)
| |PDF (204 KB)

An advanced technique based on broadband vector network analyser measurement is proposed to generate the SPICE models for radio-frequency integrated circuit packages. The models can account for various package effects at radio frequencies View full abstract»

• ### Dynamic behaviour of hysteresis chaotic circuit

Publication Year: 1999, Page(s):1896 - 1897
Cited by:  Papers (1)
| |PDF (208 KB)

A re-formulation of the equations governing the dynamics of a hysteresis chaotic circuit is presented. The effects of the removal of a constraint on the circuit parameters are discussed View full abstract»

• ### In-fibre amplitude modulation at gigahertz frequencies using elasto-optic effect in fibre Bragg grating

Publication Year: 1999, Page(s):1969 - 1970
| |PDF (232 KB)

In-fibre optical amplitude modulation via the elasto-optic effect has been obtained up to 1 GHz using a fibre Bragg grating with coaxial acoustic transducer. The modulation showed resonances every 45 MHz. The peak wavelength shift resulting from the strain generated by the transducer was found to be ~30 pm View full abstract»

• ### Notes on Miller squared code

Publication Year: 1999, Page(s):1927 - 1928
| |PDF (200 KB)

The coding rules for the Miller squared code are open to misinterpretation if only a random snapshot' of data to be encoded is considered. To ensure a bounded digital sum variation (DSV), and therefore, a DC-free characteristic, concatenated sequence bands must be considered. Also, there is an error in the original patent covering the encoder. A simple modification to the original circuitry is ne... View full abstract»

• ### Objective measure of performance of voice activity detectors

Publication Year: 1999, Page(s):1922 - 1923
| |PDF (240 KB)

A method for objectively measuring the subjective quality of speech clipped by voice activity detectors (VADs) is presented. This system is evaluated by comparing the output of a VAD to that obtained from subjective tests. The method is shown to produce an accurate prediction of the mean opinion score (MOS) determined by listening tests View full abstract»

• ### 11 dB 0-50 GHz coplanar distributed amplifier IC based on 0.25 μm non-recessed self-aligned gate GaAs P-HEMTs

Publication Year: 1999, Page(s):1943 - 1945
Cited by:  Papers (4)
| |PDF (324 KB)

A cascode distributed amplifier IC has been designed and fabricated using a 0.25 μm non-recessed self-aligned gate (SAG) GaAs P-HEMT and coplanar IC technology. Through the SAG process and an optimised epitaxial layer structure, excellent device performance has been obtained without gate recessing, and the device yield and uniformity were high enough for IC applications. The fabricated seven-st... View full abstract»

• ### Fade characteristics for K-band land-mobile satellite channels in Tokyo measured using COMETS

Publication Year: 1999, Page(s):1912 - 1913
| |PDF (216 KB)

The K-band fade statistics in Tokyo were measured using an antenna (beamwidth of 19.5° in elevation and 6.5° in azimuth) at elevations ranging from 37 to 80°. The results show that line-of sight communication is possible only ~33% of the distance at elevations <50°, But it is 98% at 80° View full abstract»

• ### Supervised texture segmentation using support vector machines

Publication Year: 1999, Page(s):1935 - 1937
Cited by:  Papers (10)
| |PDF (368 KB)

An approach to the problem of supervised texture segmentation using nonlinear support vector machines (SVMs) is presented. For each texture class a nonlinear SVM is constructed which separates that class from the other classes. The segmentation then works by applying all the SVMs to an input image and arbitrating between the SVM outputs. Experimental results show the effectiveness of the proposed ... View full abstract»

• ### Using hardware gating to improve antenna gain measurements in compact antenna range

Publication Year: 1999, Page(s):1894 - 1896
Cited by:  Papers (2)
| |PDF (320 KB)

Results are presented for antenna gain measurements in a compact antenna range at a frequency below the minimum specified operating frequency of the range. Hardware gating is used to reduce clutter or unwanted scattering from the backlobe of the feed and the walls of the chamber. Measured time domain data are presented which prove that these stray signals can be eliminated from the incident field ... View full abstract»

• ### Thick SiO2 layer produced by anodisation

Publication Year: 1999, Page(s):1950 - 1951
Cited by:  Patents (1)
| |PDF (252 KB)

A method for oxidising porous silicon to obtain thick SiO2 as the cladding layer of silicon-based silica waveguides is presented. The experimental results of oxidation are given. The following conclusions are drawn: the oxidation rate of porous silicon is several orders higher than that of bulk silicon, the appropriate temperature variation rate during oxidation combined with proper po... View full abstract»

• ### Influence of statistical amplitude and phase errors on spectral response of arrayed-waveguide grating

Publication Year: 1999, Page(s):1967 - 1969
Cited by:  Papers (5)  |  Patents (1)
| |PDF (316 KB)

Correlated random errors in an arrayed-waveguide grating (AWG) have been analysed statistically. Parameters for the resulting model were derived from the spectral response of a real AWG. When the estimated statistical parameters for phase errors were substituted into the model, the resulting spectral response was very similar to the measured response View full abstract»

• ### Turbo TCM schemes for WCDMA systems

Publication Year: 1999, Page(s):1925 - 1926
| |PDF (204 KB)

Three novel turbo TCM schemes, l/n TTCM, TTC-SPM and NP-TTC-SPM, are proposed. They are derived from the TTCM scheme but have better performance for use in WCDMA systems over fading channels. Simulation results are presented View full abstract»

• ### FIRM: high-speed distributed scheduling for ATM switches with multiple input queues

Publication Year: 1999, Page(s):1915 - 1916
Cited by:  Papers (3)
| |PDF (232 KB)

A new distributed scheduling algorithm for advanced input queueing switch architectures called FIRM is introduced. FIRM provides improved performance characteristics at high load compared to the most efficient alternative, improved fairness, and tighter service guarantees View full abstract»

• ### Broadcast-and-select OCDM/WDM network using 10 Gbit/s spectrum-sliced supercontinuum BPSK pulse code sequences

Publication Year: 1999, Page(s):1966 - 1967
Cited by:  Papers (1)  |  Patents (3)
| |PDF (224 KB)

Broadcast-and-select optical code division multiplexing (OCDM) and a WDM hybrid network are presented, in which 10 Gbit/s spectrum-sliced supercontinuum (SC) binary phase shift keying (BPSK) pulse code sequences are used as multi-wavelength optical BPSK code sources View full abstract»

• ### Iterative equalisation-decoding scheme

Publication Year: 1999, Page(s):1917 - 1919
| |PDF (280 KB)

A new iterative equalisation-decoding scheme is presented in which the decoder provides not only extrinsic information but also hard decisions of the coded bits for the next iteration. In the equaliser, the extrinsic information is used as the a priori probabilities of the transmitted bits, while hard decisions of the coded bits are utilised to improve the channel estimation. As a result, a signif... View full abstract»

• ### Network multiplexer with many truncated heavy-tail sources

Publication Year: 1999, Page(s):1920 - 1922
| |PDF (348 KB)

An exactly solvable discrete-time model with multiplexed truncated heavy-tail sources is used to investigate queueing behaviour in a network multiplexer as a function of both source number N and the subexponential behaviour of individual sources. In particular, the model illustrates the large N asymptotic description for the waiting time probabilities in such multiplexers View full abstract»

• ### Simple improvements to Harn's digital signature for Diffie-Hellman public keys

Publication Year: 1999, Page(s):1942 - 1943
| |PDF (248 KB)

To integrate authentication into the Diffie-Hellman public key distribution scheme, Harn proposed digital signature schemes that did not involve the use of one-way functions. However, such schemes cannot withstand the Nyberg-Rueppel attack. To ensure that the Nyberg-Rueppel attack could not be used, an improvement was proposed by He and Wu. However, the computational cost caused by the improvement... View full abstract»

• ### Dual-input RC integrator and differentiator with tuneable time constants using current feedback amplifiers

Publication Year: 1999, Page(s):1910 - 1911
Cited by:  Papers (2)
| |PDF (180 KB)

A dual-input RC active integrator and a differentiator with tuneable time constants are described. They are suitable for analogue signal processing applications, and have been implemented using a commercially available current feedback amplifier. Experimental results confirm theoretical prediction View full abstract»

• ### Design of swap interleaver for turbo codes

Publication Year: 1999, Page(s):1939 - 1940
Cited by:  Papers (2)  |  Patents (2)
| |PDF (212 KB)

A swap interleaver for turbo codes that can be obtained from a classical block interleaver is proposed. By increasing the frame length and s-parameter, the search time required to obtain the swap interleaver can be reduced significantly as compared to the time required for a conventional s-random interleaver View full abstract»

• ### Miniature 1 kW, 95 GHz magnetrons

Publication Year: 1999, Page(s):1960 - 1961
Cited by:  Papers (19)
| |PDF (260 KB)

Miniature spatial-harmonic magnetrons with a cold cathode having 1 kW peak power at 95 GHz are presented. The performance and operating conditions of the magnetrons are discussed and compared with those for classical magnetrons View full abstract»

• ### Mechanical' neural learning for blind source separation

Publication Year: 1999, Page(s):1963 - 1964
Cited by:  Papers (3)
| |PDF (220 KB)

A class of learning models derived from the study of the dynamics of an abstract rigid mechanical system is presented. Application to blind source separation is illustrated through computer simulations 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