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# Electronics Letters

## Filter Results

Displaying Results 1 - 25 of 61
• ### 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»

• ### Power divider with various power dividing ratios

Publication Year: 1999, Page(s):1961 - 1963
Cited by:  Papers (3)
| | PDF (340 KB)

A new power divider which has a completely planar structure and has various output power ratios is presented. This divider does not need any internal isolation resistors and has almost perfect matching at all ports and perfect isolation characteristics. Such a divider has been fabricated as an example which has output power ratios of 1:1:1. 4:1:1 and 3:2:1 for a three-way divider, and 1:2 and 1:1 ... View full abstract»

• ### Cryptanalysis of group signature scheme using self-certified public keys

Publication Year: 1999, Page(s):1938 - 1939
| | PDF (244 KB)

A group signature is a digital signature that allows a group member to sign messages anonymously on behalf of the group. Recently, Tseng and Jan proposed a group signature scheme which uses self-certified public keys. The authors show that the newly proposed group signature scheme is linkable because, given two signatures, it can be easily decided if both signatures are generated by the same group... View full abstract»

• ### Push-pull power amplifier integrated with microstrip leaky-wave antenna

Publication Year: 1999, Page(s):1891 - 1893
Cited by:  Papers (5)
| | PDF (296 KB)

An X-band active integrated antenna push-pull power amplifier is presented that uses a dual feed microstrip leaky-wave antenna for both out-of-phase power combining and second harmonic tuning. This novel structure results in a compact and high efficiency power amplifier design. At the operating frequency of 8.7 GHz. A maximum measured PAE of 54% at an output power of 38.1 dBm has been achieved 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»

• ### Very low-voltage class AB CMOS and bipolar precision current rectifiers

Publication Year: 1999, Page(s):1904 - 1905
Cited by:  Papers (6)
| | PDF (220 KB)

Simple class-AB CMOS and bipolar precision rectifier circuits that operate from a single supply close to a transistor's threshold voltage are introduced. These circuits have output voltage swings comparable to the supply voltage. Results from simulations of MOS and bipolar precision rectifiers at 20 and 100 MHz, respectively, are presented. Experimental results of a test chip are presented that ve... View full abstract»

Publication Year: 1999, Page(s):1937 - 1938
Cited by:  Papers (3)  |  Patents (1)
| | PDF (244 KB)

The weaknesses of the password-based protocol for downloading a private key presented by Perlman and Kaufman at NDSS'99 are discussed View full abstract»

• ### Equivalence of cylindrical boundary for dipole antenna in borehole

Publication Year: 1999, Page(s):1890 - 1891
| | PDF (212 KB)

An equivalent method is presented for dealing with the cylindrical boundary present in the dipole antenna problem in electric drill-rod telemetry systems. Numerical examples show that this technique is simple and valid 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»

• ### 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»

• ### Coplanar waveguide transmission lines and high Q inductors on CMOS grade silicon using photoresist and polyimide

Publication Year: 1999, Page(s):1957 - 1958
Cited by:  Papers (6)
| | PDF (228 KB)

Gold coplanar waveguide (CPW) transmission lines with losses of <0.5 dB/mm at 60 GHz have been produced on CMOS grade silicon substrates using a 15 μm thick layer of either photoresist or polyimide. This process, together with an electroplated interconnect technique, has been used to produce spiral inductors on a 2 Ω/cm n-Si substrate with a Q of 15 and L of 1.2 nH at 6 GHz View full abstract»

• ### Gradual RELAX algorithm for RFI suppression in UWB-SAR

Publication Year: 1999, Page(s):1916 - 1917
Cited by:  Papers (4)  |  Patents (2)
| | PDF (200 KB)

Parametric methods of radio frequency interference (RFI) suppression in ultra-wideband synthetic aperture radar (UWB-SAR) often outperform their non-parametric counterparts at the expense of computational complexity. The authors present a parametric algorithm that gradually applies the RELAX algorithm and results in greatly improved computational efficiency and stability View full abstract»

• ### Switched-capacitor DAC with analogue mismatch correction

Publication Year: 1999, Page(s):1903 - 1904
Cited by:  Papers (11)  |  Patents (6)
| | PDF (244 KB)

A background calibration method for enhancing the accuracy and linearity of a switched-capacitor digital-to-analogue converter is described. The method can be used alone or in combination with mismatch shaping to achieve very high accuracy and linearity combined with high speed 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»

• ### 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»

• ### Memory switching in amorphous silicon-rich silicon carbide

Publication Year: 1999, Page(s):1976 - 1977
Cited by:  Patents (7)
| | PDF (248 KB)

Memory switching has been observed in simple metal-semiconductor-metal structures containing lightly amorphous silicon carbide. In common with switching in other disordered materials, a forming process was used to initiate the switching process. A range of switching effects were found but a particularly interesting transition could be explained by a change in the number of charged defect states in... 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»

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

Publication Year: 1999, Page(s):1970 - 1971
Cited by:  Papers (14)  |  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»

• ### Using nullors for realisation of current-mode FTFN-based inverse filters

Publication Year: 1999, Page(s):1889 - 1890
Cited by:  Papers (2)
| | PDF (196 KB)

The authors present a general procedure for the realisation of current-mode four-terminal floating nullor (FTFN)-based inverse filters from the well-developed voltage-mode filters using nullors. Each of the derived filters possesses an inverse transfer function identical to that of the original voltage-mode filter without the need for any matching conditions. The cascadability characteristics of t... View full abstract»

• ### High-performance single-frequency fibre Fabry-Perot laser (FFPL) with self-injection locking

Publication Year: 1999, Page(s):1952 - 1954
Cited by:  Papers (5)  |  Patents (2)
| | PDF (340 KB)

The characteristics are presented of a 5 mm long Er3+:Yb3+ fibre Fabry-Perot laser (FFPL) with self-injection locking by a fibre Bragg grating (FBG), and its high performance is demonstrated in a 10 Gbit/s NRZ transmission system. The laser produces a single frequency and single polarisation output, has a high output power exceeding 13 mW, a narrow linewidth of -100 kHz, and ... View full abstract»

• ### 480 channel 10 GHz spaced multi/demultiplexer

Publication Year: 1999, Page(s):1964 - 1966
Cited by:  Papers (2)  |  Patents (17)
| | PDF (336 KB)

The authors report a 480 channel 10 GHz spaced multi/ demultiplexer achieved by using a three-stage parallel connection approach consisting of a WDM splitter, two 100 GHz spaced AWsS and 64 10 GHz spaced AWGs. The channel crosstalk to neighbouring and all other channels is <-20 dB. The multi/demultiplexer is capable of covering the entire wavelength range (1525-1564 nm) of silica-based optical ... View full abstract»

• ### Identification scheme based on Shamir's RSA for paranoids'

Publication Year: 1999, Page(s):1941 - 1942
| | PDF (264 KB)

In 1995, Shamir proposed a variant of the RSA cryptosystem that allows for the use of large moduli while keeping computing requirements substantially lower than those in conventional RSA. An identification scheme based on this cryptosystem is outlined View full abstract»

• ### Linear feedback shift registers as vector quantisation codebooks

Publication Year: 1999, Page(s):1919 - 1920
Cited by:  Papers (1)
| | PDF (216 KB)

Linear feedback shift registers with fixed initial conditions can be used as codebooks for vector quantisation data compression methods, avoiding the need to store codebooks at the encoder and decoder. Suboptimal search procedures can be used to effectively search the codebook space with lower complexity, with only modest coding performance penalties 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»

• ### Hybrid integrated differential photoreceiver comprising dual-PD and high-speed GaAs amplifier IC assembled on planar lightwave circuit platform

Publication Year: 1999, Page(s):1971 - 1973
Cited by:  Papers (2)
| | PDF (352 KB)

A hybrid integrated differential photoreceiver has been successfully fabricated which comprises a dual photodiode (dual-PD) and a high-speed GaAs amplifier integrated circuit (IC) on a planar lightwave circuit (LC) platform with integrated metal-insulation-metal (MIM) structural capacitors by using a novel flip-chip bonding technique. The bandwidth of the photoreceiver is wide enough to receive a ... 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