# Electronics Letters

## Filter Results

Displaying Results 1 - 22 of 22
• ### Low-power gigabit logic by GaAs SSFL

Publication Year: 1981, Page(s):553 - 554
Cited by:  Papers (1)
| |PDF (353 KB)

Experimental results on improved GaAs Schottky-barrier coupled Schottky-barrier gate FET logic (SSFL) are reported. A 13-stage ring oscillator, gate dimensions 1.2Ã20 Â¿m2, showed tpd=55 ps/gate at P=3.5 mW/gate. Also, a divide-by-two circuit was confirmed, starting normal operation from a single initialisation pulse. View full abstract»

• ### New correlation radiometer for microwave thermography

Publication Year: 1981, Page(s):554 - 555
Cited by:  Papers (12)
| |PDF (325 KB)

We describe a new radiometric method capable of reaching a better control of the volume of the tissue under investigation in microwave thermography (this technique is mainly used in biomedical applications). Our process is based on the fact that two (or several) probes with a volume under investigation in common are collecting thermal noise signals which are correlated. View full abstract»

• ### High-performance millimetrewave GaAs Schottky-barrier flip-chip diode

Publication Year: 1981, Page(s):555 - 557
Cited by:  Papers (3)
| |PDF (838 KB)

Theoretical and experimental results reveal a novel flip-chip structure which allows attainment of both parasitic and internal device element values comparable with, or even superior to, the ultrasensitive whisker-contact Schottky-diode structure. Preliminary results with neither device nor choke structure matched to mixer block show LDSB<10 dB, Tmix approximately 2000 K (91 GHz, 300 K). View full abstract»

• ### Temperature dependence of the Gunn threshold in GaAs

Publication Year: 1981, Page(s):557 - 558
| |PDF (311 KB)

Measurement of the temperature dependence of the threshold for transferred electron instabilities in GaAs gives (1/IP(300))Ã(dIP/dT=Â¿2.4Â±0.2Ã10Â¿3 KÂ¿1, independent of carrier concentration The threshold field decreases with decreasing T and depends on carrier concentration. Reasonable agreement is obtained with Monte Carlo calculations based on Â¿-L-X ordering. View full abstract»

• ### Blood compatibility of components and materials in silicon integrated circuits

Publication Year: 1981, Page(s):558 - 559
Cited by:  Papers (4)
| |PDF (320 KB)

The blood coagulation test of fundamental materials, packages, and polymers related to ICs was made by the Sahli-Fonio method Samples of 18 kinds were tested. Among all samples, parylene C, which is used as an electronics-coating polymer film, is the best Silicon is poor next to glass View full abstract»

• ### 1.3 Â¿m-wavelength mode controlled GaInAsP/InP etched laser

Publication Year: 1981, Page(s):559 - 560
| |PDF (258 KB)

A mode controlled GaInAsP/InP (Â¿=1.3 Â¿m) etched laser with a lens-like narrow strip waveguide along the <01> direction has been fabricated. The minimum threshold current was 160 mA for 170 Â¿m cavity length, and a single longitudinal mode operation has been obtained up to 1.3 times the threshold. View full abstract»

• ### Single-mode-fibre design for 4 Â¿m band operation

Publication Year: 1981, Page(s):560 - 561
Cited by:  Papers (3)
| |PDF (365 KB)

The splicing and cabling added loss are evaluated for 4 Â¿m-wavelength single-mode fibres. It is shown that splice offset and microbending losses are critical and that high index differences are required. Added losses are small as 0.01 dB/km can be obtained with careful fibre design and handling. View full abstract»

• ### Compound representation of high resolution sea clutter

Publication Year: 1981, Page(s):561 - 563
Cited by:  Papers (141)
| |PDF (547 KB)

A proposed form of compound distribution to describe the non-Rayleigh distribution and correlation properties of high resolution radar sea clutter is shown to be a good fit to experimental data. From this model the K distribution is derived, and a possible physical mechanism is discussed. View full abstract»

• ### Minimum trajectory sensitivity of a linear system

Publication Year: 1981, Page(s):563 - 564
| |PDF (351 KB)

The letter provides a proof for the statement that, for a linear multivariable system, minimum eigenvalue sensitivity guarantees minimum trajectory sensitivity. View full abstract»

• ### Wavelength dependence of polarisation mode dispersion in elliptical-core single-mode fibres

Publication Year: 1981, Page(s):564 - 565
Cited by:  Papers (6)
| |PDF (275 KB)

Polarisation mode dispersion in elliptical-core single-mode fibres has been measured by a spatial technique based on a visibility maximum position measurement in an interferometer. Using the technique, wavelength dependence of the modal dispersion has been measured by varying optical source wavelengths between 821 and 904 nm. As a result, contribution of geometrical and strain birefringences on th... View full abstract»

• ### Electron scattering profiles in SOS films measured by temperature-dependent Hall effect

Publication Year: 1981, Page(s):566 - 567
Cited by:  Papers (1)
| |PDF (338 KB)

The electron scattering mechanisms at every depth in heteroepitaxial SOS films have been investigated by measuring the temperature dependence of Hall mobility. It appears that, above the criticalÂ¿ temperature Tc=120 K, lattice scattering prevails only in the proximity of 1/SiO, while ionised impurity scattering becomes dominant near the substrate (2000 Â¿ from Si/Al2O3) even at room temperature. View full abstract»

• ### Reliability assurance for long-length optical fibre based on proof testing

Publication Year: 1981, Page(s):567 - 568
Cited by:  Papers (11)
| |PDF (325 KB)

An allowable stress condition for life-time assurance of long-length optical fibre has been clarified. The derived equation, by taking into account the failure probability, provides high assurance of fibre reliability based on proof testing. View full abstract»

• ### Modal distribution of backscattered light in a step-index multimode fibre

Publication Year: 1981, Page(s):568 - 570
| |PDF (465 KB)

The modal distribution of backscattered light has been measured for a low mode-mixing, step-index fibre. The modal distribution of the Rayleigh backscatter is shown to depend on that of the exciting pulse. The possibility of substantial errors arising in reflectometry measurements of splice and connector losses is demonstrated where the receiver is mode-selective. View full abstract»

• ### Microstrip IMPATT-diode oscillator for 100 GHz

Publication Year: 1981, Page(s):570 - 571
Cited by:  Papers (6)
| |PDF (301 KB)

The design and performance of a rugged duroid-microstrip IMPATT-diode oscillator is described. The oscillator's frequency was set by a simple, easily replaceable metal resonant cap, with fine tuning of about 30 MHz/mA being achieved by means of the diode current. View full abstract»

• ### Cascaded multipole switches for single-mode and multimode optical fibres

Publication Year: 1981, Page(s):571 - 573
Cited by:  Papers (11)
| |PDF (543 KB)

Multistage moving-fibre array switches which use preferentially etched silicon chips for the precise alignment of the optical fibres have been developed. In particular, a 1Ã4 single mode, and a 1Ã8 multimode fibre switch are described, with which average insertion losses of 0.8 and 0.2 dB were achieved, respectively. View full abstract»

• ### Failure of Matthiessen's rule in the calculation of carrier mobility and alloy scattering effects in Ga0.47In0.53As

Publication Year: 1981, Page(s):573 - 574
Cited by:  Papers (3)
| |PDF (295 KB)

Matthiessen's rule is shown to be an unacceptable approximation to analyse the scattering mechanisms in semiconductors, especially when deriving the alloy scattering-limited mobility from the experimental data. The anomalous temperature dependence of the alloy scattering-limited mobilityÂ¿ is caused by the failure of Matthiessen's rule in the presence of competing scattering modes. The electron H... View full abstract»

• ### Modelling of dual-gate MESFETs with second gate forward biased

Publication Year: 1981, Page(s):574 - 576
| |PDF (410 KB)

Drain characteristics of dual-gate MESFETs with the second gate positively biased have been analysed on the basis of Pucel.s model. A diode in series with a resistor was proposed to model the positively biased gate. The simulated characteristics agree well with the experimental curves. View full abstract»

• ### Extension of time-bandwidth product in SAW spectrum analysers

Publication Year: 1981, Page(s):576 - 578
Cited by:  Papers (2)
| |PDF (516 KB)

Surface-acoustic-wave (SAW) spectrum analysers use the chirp transform algorithm for real time analysis over wide (MHz) signal bandwidths. This letter reports a new technique for the generation of the long-duration wideband linear frequency modulated (chirp) waveforms used in these analysers. It now permits the overall time bandwidth product of these spectrum analysers to exceed that of the consti... View full abstract»

• ### Variation of diffused boron concentration in the neighbourhood of an oxide-masked edge

Publication Year: 1981, Page(s):578 - 579
| |PDF (329 KB)

The concentration of boron diffused into silicon from a vapour source is found to be affected by the presence of masking oxide. Both spreading resistance and infra-red free-carrier emission techniques have been used to study the effect, and a decrease of about 15Â° in carrier concentration is observed close to the oxide-masked edge. View full abstract»

• ### S-band TRAPATT oscillator with reduced frequency-temperature dependence

Publication Year: 1981, Page(s):579 - 580
| |PDF (258 KB)

The frequency of operation of a free-running trapatt oscillator is dependent on the ambient temperature. A means of compensating for this frequency variation has been studied and results are reported. View full abstract»

• ### Erratum: Low-distortion high-output class B current convertor using error feedforward

Publication Year: 1981
| |PDF (65 KB)

First Page of the Article
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• ### Erratum: Inclusion of amplifier finite gain and bandwidth in analysis of switched-capacitor filters

Publication Year: 1981
| |PDF (65 KB)

First Page of the Article
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