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# Electronics Letters

## Filter Results

Displaying Results 1 - 25 of 63
• ### Mapping with cell addressing of train transport MPEG-2 over ATM cells via AAL-5

Publication Year: 1996, Page(s):1857 - 1858
| | PDF (542 KB)

The authors propose an original method for addressing the ATM cells (via AAL-5) that allows the detection and localisation of lost cells. This method is particularly suited to the train transport MPEG-2 packet structure, but it may be generalised for other applications. Elimination of the packing delay and propagation errors, in addition to 100% mapping efficiency, which apply for every size of PD... View full abstract»

• ### Positive feedback in adiabatic logic

Publication Year: 1996, Page(s):1867 - 1869
Cited by:  Papers (58)
| | PDF (395 KB)

An adiabatic logic family is presented, which makes use of a CMOS positive feedback amplifier. The gate is based on dual rail logic and a cascade of such gates only needs three power/clock lines to operate. The positive feedback amplifier ensures high noise immunity and takes part in the energy recovery process. View full abstract»

• ### Superimposed Bragg gratings on semiconductor material

Publication Year: 1996, Page(s):1884 - 1885
Cited by:  Papers (4)
| | PDF (317 KB)

The authors report the transfer of six Bragg gratings at the same location into semiconductor material. Measurements on an active device demonstrate that all the gratings have the same efficiency for guided light. This technology is an attractive alternative to the sampling effect for providing multiwavelength filter functionality at predefined wavelengths. View full abstract»

• ### High-responsivity low-dark-current InGaAlAs waveguide photodiode with a symmetric double-core for optical access networks

Publication Year: 1996, Page(s):1882 - 1883
Cited by:  Papers (5)
| | PDF (232 KB)

A symmetric InGaAlAs waveguide photodiode for low cost optical hybrid integration is designed and fabricated. High responsivity of 0.95 A/W and coupling tolerance of ±2.6 μm, obtained by optimising the double core structure are demonstrated. Dark current as low as 300 pA is achieved by using surface passivation View full abstract»

• ### Unified model for junction size, substrate doping, and energy dependence of α-particle-induced charge collection

Publication Year: 1996, Page(s):1880 - 1882
Cited by:  Papers (1)
| | PDF (300 KB)

A model for the α-particle-induced charge collection has been developed. By accounting for the funnelling and diffusion charges separately, our model accurately describes the junction size dependence of collected charge for a wide range of junction sizes, substrate doping levels, and α-particle energies View full abstract»

• ### Simultaneous and independent semiconductor laser operation at 1.3 and 1.55 μm produced by focused ion beam etching

Publication Year: 1996, Page(s):1891 - 1892
Cited by:  Papers (1)
| | PDF (240 KB)

The authors show that, by introducing a single focused ion beam etched cavity into the 1.3 μm bandgap material between the phase tuning and sampled grating sections of a three section DBR laser, sufficient feedback is produced to enable stimulated emission at 1.3, as well as 1.55 μm. The etched cavity also increases the inter-contact resistance View full abstract»

• ### Low-voltage CMOS bias circuit

Publication Year: 1996, Page(s):1879 - 1880
Cited by:  Papers (1)
| | PDF (184 KB)

A simple CMOS circuit is reported for generating supply-independent bias voltages and currents, down to a minimum supply voltage. The circuit is compatible with digital processes. Supply interference is rejected by >40 dB for all frequencies View full abstract»

• ### Rapid DTMF signal classification via parallel cascade identification

Publication Year: 1996, Page(s):1862 - 1863
Cited by:  Patents (2)
| | PDF (280 KB)

The parallel cascade identification of nonlinear systems is used for the rapid recognition of dual tone multi-frequency (DTMF) signals, i.e. the dual tones' used to encode the digits on a telephone keypad. The authors demonstrate that parallel cascades can correctly identify DTMF signals with half or less than half of the input data required by current methods View full abstract»

• ### Algorithm based on modified threaded binary tree for estimating delay affected by internal charges in CMOS gates

Publication Year: 1996, Page(s):1877 - 1879
Cited by:  Papers (1)
| | PDF (348 KB)

Internal charges affect the delay behaviour of CMOS gates. A modified threaded binary (MTB) tree and a recursive algorithm are proposed to solve this problem. The charge sharing effect, which takes place among the internal nodes, is also considered in this algorithm View full abstract»

• ### Low power data decision IC for 20-40 Gbit/s data links using 0.2 μm AlGaAs/GaAs HEMTs

Publication Year: 1996, Page(s):1855 - 1856
Cited by:  Papers (3)
| | PDF (440 KB)

A decision IC for optical data links at bit rates of 20-40 Gbit/s has been realised by using 0.2 μm AlGaAs/GaAs HEMT technology and tested on-wafer at bit rates up to 25 Gbit/s. The IC can be operated with a supply from ~3.3 to 5.2 V and a DC current of ~50 mA View full abstract»

• ### Microwave and thermal characteristics of backside-connected flip-chip power heterojunction bipolar transistors

Publication Year: 1996, Page(s):1931 - 1932
Cited by:  Papers (1)
| | PDF (340 KB)

Measured and modelled characteristics are reported for a new geometry for contacting AlGaAs-GaAs heterojunction bipolar transistors (HBTs), which provides lower thermal resistance and lower emitter inductance than does the conventional approach. Common-emitter connected HBTs are mounted emitter side down on a metal heatsink, which also serves as electrical ground. Connections to the base and colle... View full abstract»

• ### Practical consideration for bandpass sampling

Publication Year: 1996, Page(s):1861 - 1862
Cited by:  Papers (12)
| | PDF (268 KB)

The uniform bandpass sampling theorem has been modified to cope with sampling frequency instability and carrier frequency variations. Minimum sampling rates for given sampling and carrier frequency variations are derived. A robust bandpass sampling method is proposed which requires the sampling frequency to be such that the carrier frequency is on the 1/4 or -1/4 sampling frequency grid View full abstract»

• ### Simple high-rate constrained codes

Publication Year: 1996
Cited by:  Papers (5)  |  Patents (2)
| | PDF (132 KB)

A new coding technique is proposed that translates binary user information into a constrained sequence having the virtue that at most k zeros' between logical `ones' will occur. The new construction offers a high rate while both the complexity for encoding and decoding are still very low. Single channel bit errors will result in at most one decoded byte error. A worked example is described with r... View full abstract»

• ### Input queueing multicast ATM packet switch with two priority classes using a priority scheme with a window policy

Publication Year: 1996, Page(s):1854 - 1855
Cited by:  Papers (1)
| | PDF (252 KB)

To achieve a high performance multicast switch with multiple priority classes, we have proposed a new N×N input queuing technique which uses a novel priority scheme and a high-performance arbitration algorithm. The scheme uses a priority without iteration (POI) method and a pipeline arbitration. Simulation results show that this scheme improves the performance of delay critical services and ... View full abstract»

• ### High voltage (450 V) 6H-SiC lateral MESFET structure

Publication Year: 1996, Page(s):1929 - 1931
Cited by:  Papers (1)  |  Patents (2)
| | PDF (468 KB)

A high voltage 6H-SiC lateral MESFET has been fabricated using a three mask process. Selective ion implantation was used to create the conducting layer (N-region) demonstrating the RESURF effect in SiC for first time, as well as easy isolation and edge termination. This MESFET was able to withstand a forward blocking voltage of 450 V at a gate voltage of -20 V. The specific on-resistance and trans... View full abstract»

• ### Array pattern synthesis in the complex plane optimised by a genetic algorithm

Publication Year: 1996, Page(s):1843 - 1845
Cited by:  Papers (6)
| | PDF (328 KB)

Array pattern nulling by operating on the roots of the array polynomial in the complex plane using a genetic algorithm (GA) is demonstrated. A pattern envelope constraint and an array efficiency criterion are applied. The algorithm is much faster than a similar GA operating on the complex weights of the array factor View full abstract»

• ### Chirp tailoring in Q-switched InGaAsP lasers using electroabsorption loss section

Publication Year: 1996, Page(s):1886 - 1888
Cited by:  Papers (2)
| | PDF (400 KB)

Chirp tailoring is demonstrated in Q-switched two-section InGaAsP lasers, with RF modulation applied to an electroabsorption section of high saturation intensity. The pulse time-bandwidth product is varied by a factor of ~4, by changing the DC bias of the gain section. Pulses which are almost transform-limited are obtained for the lowest biases. Gain-switching experiments performed with the same l... View full abstract»

• ### Peak factor in orthogonal multicarrier modulation with variable levels

Publication Year: 1996, Page(s):1859 - 1861
Cited by:  Papers (9)  |  Patents (15)
| | PDF (344 KB)

Usually in multicarrier modulation (MCM) the level of the modulated signal is constant and does not depend on the specific vector of information symbols which are actually transmitted. In such a case the value of peak factor (PF) for an MCM signal composed N carriers is 10 log10N [dB]. The author proposes a method for reducing the PF, where for each vector of information symbols, for wh... View full abstract»

• ### Adaptive lattice-form IIR blind equaliser

Publication Year: 1996, Page(s):1869 - 1870
Cited by:  Papers (1)
| | PDF (212 KB)

The author describes incorporation of the lattice-form structure in the blind infinite impulse response (IIR) algorithm, based on a cost function which is a modified version of that proposed by Shalvi and Weinstein (1990). The proposed IIR blind equaliser has the advantage of lower complexity; simulation results also indicate that the proposed IIR blind equaliser has a faster convergence rate and ... View full abstract»

• ### Product-form closed discrete-time queueing networks with finite capacity shared buffer nodes

Publication Year: 1996, Page(s):1875 - 1876
| | PDF (252 KB)

An established class of product-form queueing networks with batch arrivals and batch services is extended to closed networks of discrete-time nodes with finite capacity and shared buffers. A direct application is in modelling ATM networks View full abstract»

• ### Dual FH/MFSK system over a Rayleigh fading channel

Publication Year: 1996, Page(s):1852 - 1854
| | PDF (332 KB)

A dual frequency-hopped/multilevel frequency shift keying (FH/MFSK) system is proposed for a Rayleigh fading channel. The dual FH/MFSK system is achieved by frequency-hopping a carrier frequency of the FH/MFSK system proposed by Goodman et al. (1980). The numerical results show that the proposed system allows more users than does the conventional system View full abstract»

• ### GaAs low-high doped MESFET MMIC power amplifier for CDMA/AMPS dual-mode cellular telephone

Publication Year: 1996, Page(s):1928 - 1929
Cited by:  Papers (3)
| | PDF (348 KB)

An MMIC power amplifier using low-high doped GaAs MESFETs (LH-MESFETs) has been developed for a CDMA/AMPS dual mode cellular telephone. It is fully integrated on one chip (2.5×2.9 mm2 ) including all matching circuits. For CDMA operation at frequency of 836.5 MHz, an efficiency of 25%, adjacent channel leakage power of -29 dBc at 885 kHz, and -48 dBc at 1980 kHz were obtained with... View full abstract»

• ### Three phase bridge current controller with single sensor

Publication Year: 1996, Page(s):1842 - 1843
Cited by:  Papers (2)
| | PDF (224 KB)

Control of phase currents in a three-phase voltage source inverter bridge is important for electric drives and unity power factor converters. To reduce equipment costs and overcome unequal sensor errors, the use of a single DC link current sensor is important. A new technique is described which uses redundant bridge switching states to allow current control with a DC link current sensor View full abstract»

• ### Taper-assisted polarisation compensation in efficiently fibre-coupled InP demultiplexer

Publication Year: 1996, Page(s):1885 - 1886
Cited by:  Papers (2)  |  Patents (2)
| | PDF (264 KB)

A 8×2 nm polarisation independent InP-based demultiplexer operating at ~1.54 μm with a low birefringence wide input waveguide has been produced by incorporating polarisation dispersion compensation into a highly birefringent waveguide. Mode converters were used in each arm of the grating to avoid transition losses. The fibre-waveguide insertion loss is 0.5 dB and, misalignment tolerance (... View full abstract»

• ### Bistable microwave oscillator with magnetostatic wave signal-to-noise enhancer in the feedback loop

Publication Year: 1996, Page(s):1894 - 1895
Cited by:  Papers (3)
| | PDF (228 KB)

A microwave feedback oscillator with a saturable amplifier and a nonlinear magnetostatic spin wave signal-to-noise enhancer device in the feedback loop is described. The oscillator has bistable behaviour and can be turned on with short low power microwave pulses 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
Head of Photonics Research
University of Cambridge, UK