Online ISSN
1350-911X
Print ISSN
0013-5194
Electronics Letters
Volume 16, Issue 15, 17 July 1980
Volumes & issues:
-
Volume 59 (2023)
-
Volume 58 (2022)
-
Volume 57 (2021)
-
Volume 56 (2020)
-
Volume 55 (2019)
-
Volume 54 (2018)
-
Volume 53 (2017)
-
Volume 52 (2016)
-
Volume 51 (2015)
-
Volume 50 (2014)
-
Volume 49 (2013)
-
Volume 48 (2012)
-
Volume 47 (2011)
-
Volume 46 (2010)
-
Volume 45 (2009)
-
Volume 44 (2008)
-
Volume 43 (2007)
-
Volume 42 (2006)
-
Volume 41 (2005)
-
Volume 40 (2004)
-
Volume 39 (2003)
-
Volume 38 (2002)
-
Volume 37 (2001)
-
Volume 36 (2000)
-
Volume 35 (1999)
-
Volume 34 (1998)
-
Volume 33 (1997)
-
Volume 32 (1996)
-
Volume 31 (1995)
-
Volume 30 (1994)
-
Volume 29 (1993)
-
Volume 28 (1992)
-
Volume 27 (1991)
-
Volume 26 (1990)
-
Volume 25 (1989)
-
Volume 24 (1988)
-
Volume 23 (1987)
-
Volume 22 (1986)
-
Volume 21 (1985)
-
Volume 20 (1984)
-
Volume 19 (1983)
-
Volume 18 (1982)
-
Volume 17 (1981)
-
Volume 16 (1980)
-
Volume 15 (1979)
-
Volume 14 (1978)
-
Volume 13 (1977)
-
Volume 12 (1976)
-
Volume 11 (1975)
-
Volume 10 (1974)
-
Volume 9 (1973)
-
Volume 8 (1972)
-
Volume 7 (1971)
-
Volume 6 (1970)
-
Volume 5 (1969)
-
Volume 4 (1968)
-
Volume 3 (1967)
-
Volume 2 (1966)
-
Volume 1 (1965)
Volume 16, Issue 15
17 July 1980
Electro-optical polarisation control on single-mode optical fibres
- Author(s): M. Kubota ; T. Oohara ; K. Furuya ; Y. Suematsu
- Source: Electronics Letters, Volume 16, Issue 15, page: 573 –573
- DOI: 10.1049/el:19800397
- Type: Article
- + Show details - Hide details
-
p.
573
(1)
The polarisation of the output light of a single-mode optical fibre was controlled and stabilised by an electro-optical feedback system consisting of two LiNbO3 crystals and voltage controllers. Using this system, polarisation mismatching loss was reduced to 0.2 dB.
Fast binary logarithm computing circuit for binary numbers less than one
- Author(s): G. Frangakis
- Source: Electronics Letters, Volume 16, Issue 15, p. 574 –575
- DOI: 10.1049/el:19800398
- Type: Article
- + Show details - Hide details
-
p.
574
–575
(2)
A fast and expandable circuit for computing the approximate binary logarithm and antilogarithm of a fractional binary number is described. Illustration examples are included, and accuracy of the circuit is discussed.
High bit rate modulation of narrow-stripe proton-implanted GaAs/GaAlAs injection lasers
- Author(s): C. Lindström ; P. Tihanyi ; T. Andersson ; P. Torphammar
- Source: Electronics Letters, Volume 16, Issue 15, p. 575 –577
- DOI: 10.1049/el:19800399
- Type: Article
- + Show details - Hide details
-
p.
575
–577
(3)
High bit rate modulation up to 2 Gbit/s of a narrow -stripe (3 μm) proton-implanted injection laser using resonance oscillation has been achieved. These results indicate that the narrow-stripe laser has possibilities of high bit rate modulation comparable to the broad-stripe laser. To obtain optimum modulation conditions, pulse height distortion was studied for various bias and pulse currents. Optimum was found for a bias current 5% above threshold and a pulse current of 42 mA in a laser with a threshold current of 111 mA.
Switching in m.i.s.m. and m.i.s.i.m. structures
- Author(s): M. Darwish and K. Board
- Source: Electronics Letters, Volume 16, Issue 15, p. 577 –578
- DOI: 10.1049/el:19800400
- Type: Article
- + Show details - Hide details
-
p.
577
–578
(2)
Switching has been observed in metal–thin-insulator–n-p+ structures, where the thin insulator is SiO2, or polycrystalline silicon. In this letter two alternative structures are discussed in which the n-p+ junction is replaced by a Schottky barrier. In the second device proposed two thin-insulator structures back-to-back are shown to exhibit bidirectional switching.
New a.d. convertor with special application to medium precision platinum resistance thermometry
- Author(s): C.P. Pickup
- Source: Electronics Letters, Volume 16, Issue 15, p. 578 –580
- DOI: 10.1049/el:19800401
- Type: Article
- + Show details - Hide details
-
p.
578
–580
(3)
Platinum resistance thermometers mounted on ceramic formers have a potential uncertainty, after calibration, of 0.01°C over a range exceeding −30 to +250°C. To achieve this requires resistance measurements of higher precision than is conveniently available from commercial digital instruments. A new time-interval type of a.d. convertor has been developed for this purpose and incorporated in a simple digital resistance meter with a full scale reading of 300.000 Ω and an uncertainty of 1 mΩ.
Near-field correction factors for elliptical fibres
- Author(s): Hansen J.J. Ramskov ; M.J. Adams ; A. Ankiewicz ; F.M.E. Sladen
- Source: Electronics Letters, Volume 16, Issue 15, p. 580 –581
- DOI: 10.1049/el:19800402
- Type: Article
- + Show details - Hide details
-
p.
580
–581
(2)
Correction factors for use with the near-field scanning method of index profile determination of elliptical fibres are presented. Theory and experiment show that different correction factors are required for the major and minor axes.
Ideality and noise figure characteristics of r.f. sputtered millimetre GaAs diodes
- Author(s): Y. Anand ; A. Christou ; H. Day
- Source: Electronics Letters, Volume 16, Issue 15, p. 581 –583
- DOI: 10.1049/el:19800403
- Type: Article
- + Show details - Hide details
-
p.
581
–583
(3)
Refractory Schottky barriers have been incorporated in millimetre GaAs mixer diodes to improve r.f. performance and burnout resistance. It is shown that low power r.f. sputter deposition of TiW and Ti-Mo refractories results in degradation of noise temperature ratio and to a first approximation does not affect d.c. parameters, especially the ideality factor.
Alternative burst transmission technique for digital telephone reticulation
- Author(s): R.A. Court
- Source: Electronics Letters, Volume 16, Issue 15, p. 583 –584
- DOI: 10.1049/el:19800404
- Type: Article
- + Show details - Hide details
-
p.
583
–584
(2)
The letter proposes an alternative technique for the burst (ping-pong) transmission systems currently being studied for the digital reticulation of subscriber telephone services. Its main feature is the interleaving of transmit and receive bursts to permit the use of lower burst bit rates for a given transmission distance.
Interference filter all-fibre directional coupler for w.d.m.
- Author(s): H.F. Mahlein ; H. Michel ; W. Rauscher ; A. Reichelt ; G. Winzer
- Source: Electronics Letters, Volume 16, Issue 15, p. 584 –585
- DOI: 10.1049/el:19800405
- Type: Article
- + Show details - Hide details
-
p.
584
–585
(2)
Directional couplers for wavelength division multiplexing using l.e.d.s as transmitters have been realised without imaging elements. Their total insertion loss (MUX + DEMUX) is of the order of 4 dB; their crosstalk attenuation and near-end crosstalk attenuation are 30 dB and >60 dB, respectively.
New charge transfer recursive filter
- Author(s): M. Feldmann and J. Henaff
- Source: Electronics Letters, Volume 16, Issue 15, p. 585 –587
- DOI: 10.1049/el:19800406
- Type: Article
- + Show details - Hide details
-
p.
585
–587
(3)
A new fully integrated recursive charge transfer filter is described using the concept of passive recirculation of charges. This is a novel solution for voice channel or data filters in digital communications.
Picosecond pulse generation in semiconductor lasers using resonance oscillation
- Author(s): P. Torphammar and S.T. Eng
- Source: Electronics Letters, Volume 16, Issue 15, p. 587 –589
- DOI: 10.1049/el:19800407
- Type: Article
- + Show details - Hide details
-
p.
587
–589
(3)
Narrow pulses below 100 ps (f.w.h.m.) have been generated by applying 100 or 300 ps current pulses to a wide-stripe double heterostructure laser. The modulation current was increased to minimise the pulse width.
Improved digital automatic gain control for p.c.m. signals
- Author(s): J.E. Flood and J.M. Fonseca
- Source: Electronics Letters, Volume 16, Issue 15, p. 589 –590
- DOI: 10.1049/el:19800408
- Type: Article
- + Show details - Hide details
-
p.
589
–590
(2)
A digital automatic gain control is described which uses an open-loop instead of a closed-loop configuration. This change has been made to eliminate oscillations in gain which occurred with sinusoidal input signals in the closed-loop system described previously. Results of a computer simulation of the new system are presented.
Propagation of magnetostatic surface waves in multiple magnetic layer structures
- Author(s): L.R. Adkins and H.L. Glass
- Source: Electronics Letters, Volume 16, Issue 15, p. 590 –592
- DOI: 10.1049/el:19800409
- Type: Article
- + Show details - Hide details
-
p.
590
–592
(3)
The dispersion of magnetostatic surface waves (m.s.s.w.s) propagating in structures consisting of up to four magnetic layers has been calculated. The m.s.s.w. dispersion and velocity can be controlled by selecting layer thickness and magnetisation. Experiments performed with layered y.i.g. structures were in agreement with the analysis.
Modal noise and optical feedback in high-speed optical systems at 0.85 μm
- Author(s): C. Baack ; G. Elze ; B. Enning ; G. Walf
- Source: Electronics Letters, Volume 16, Issue 15, p. 592 –593
- DOI: 10.1049/el:19800410
- Type: Article
- + Show details - Hide details
-
p.
592
–593
(2)
The most critical interferences in optical broadband communication systems at 0.85 μm are the modal noise in a graded-index fibre and the feedback problems in d.h. semiconductor lasers. Experiments with these two phenomena in a high-speed digital transmission system are described.
Integrated astable optical multivibrator using Mach-Zehnder interferometric optical switches
- Author(s): H. Ito ; Y. Ogawa ; H. Inaba
- Source: Electronics Letters, Volume 16, Issue 15, p. 593 –595
- DOI: 10.1049/el:19800411
- Type: Article
- + Show details - Hide details
-
p.
593
–595
(3)
An integrated astable optical multivibrator has been analysed and demonstrated experimentally for the first time using a couple of Mach-Zehnder interferometric optical switches with crossed and straight electronic feedback. Fairly good agreement is found between experimental and analytical results.
Very low noise photodetector system using p-i-n diode and baseband parametric upconvertor
- Author(s): D.J. Roulston
- Source: Electronics Letters, Volume 16, Issue 15, p. 595 –596
- DOI: 10.1049/el:19800412
- Type: Article
- + Show details - Hide details
-
p.
595
–596
(2)
The communication describes a sensitive photodetector system consisting of a p-i-n photodiode followed by a baseband parametric upconvertor. The overall noise performance is shown to be potentially better than that of existing avalanche photodiode systems.
Single lens transmission scanning acoustic microscope
- Author(s): A.I. Morozov and M.A. Kulakov
- Source: Electronics Letters, Volume 16, Issue 15, p. 596 –597
- DOI: 10.1049/el:19800413
- Type: Article
- + Show details - Hide details
-
p.
596
–597
(2)
A single lens transmission scanning acoustic microscope is presented. The microscope contains an acoustoelectric detector as a receiving element. It is shown that the presented version of the microscope provides sufficient resolution and image contrast.
Development of pulsed self-oscillating mixer
- Author(s): M.G. Somekh ; W. Richmond ; J. Moroz ; M.J. Lazarus
- Source: Electronics Letters, Volume 16, Issue 15, p. 597 –599
- DOI: 10.1049/el:19800414
- Type: Article
- + Show details - Hide details
-
p.
597
–599
(3)
A new kind of hornodyne transmitter/receiver ‘Doppler radar’ device has been developed in which the Doppler beat envelope is pulse-sampled by the self-mixing action in a pulsed transferred electron diode. The advantages of such a system are discussed and the techniques for extracting the signal are described.
Error rates of phase-modulated signals in multilink system with interference
- Author(s): I.M. Kostić
- Source: Electronics Letters, Volume 16, Issue 15, p. 599 –600
- DOI: 10.1049/el:19800415
- Type: Article
- + Show details - Hide details
-
p.
599
–600
(2)
The error probabilities for M-fold coherent and differentially coherent phase-shift keying signals passed through a multi-link system composed of cascaded linear amplifiers is found. At each link Gaussian noise and cochannel interference are additively injected.
Simple picosecond pulse generation scheme for injection lasers
- Author(s): Chinlon Lin ; P.L. Liu ; T.C. Damen ; D.J. Eilenberger ; R.L. Hartman
- Source: Electronics Letters, Volume 16, Issue 15, p. 600 –602
- DOI: 10.1049/el:19800416
- Type: Article
- + Show details - Hide details
-
p.
600
–602
(3)
A simple scheme is reported for generating picosecond optical pulses from injection lasers based on short electrical pulse excitation. An integrated step recovery diode impulse-train generator (‘comb’ generator) which gives 50 ps 25 V electrical pulses at 200 to 500 MHz rates is used to drive the injection lasers. Optical pulses as short as 40 ps are generated by the corresponding electrical drive pulses.
GaAs-GaAlAs phototransistor/laser light amplifier
- Author(s): H. Beneking ; N. Grote ; W. Roth ; M.N. Svilans
- Source: Electronics Letters, Volume 16, Issue 15, p. 602 –603
- DOI: 10.1049/el:19800417
- Type: Article
- + Show details - Hide details
-
p.
602
–603
(2)
A hybrid light amplifier consisting of a GaAs-GaAlAs widegap phototransistor as light detector and a d.h. laser as light emitter has been realised. Amplification up to 25 dB has been achieved. Fastest turn-on and turn-off times were 16 ns and 24 ns, respectively. A monolithically integrated amplifier structure is proposed.
Switched-capacitor realisation of C- and D-sections
- Author(s): M.K. Li
- Source: Electronics Letters, Volume 16, Issue 15, p. 603 –604
- DOI: 10.1049/el:19800418
- Type: Article
- + Show details - Hide details
-
p.
603
–604
(2)
The switched-capacitor realisations of C- and D-sections based on the two-wire line are presented. These configurations, though bearing the same restrictions on realisability as their microwave prototypes, may have wide applications because of their simplicity of construction.
Finite boundary corrections to coplanar stripline analysis
- Author(s): V. Fouad hanna
- Source: Electronics Letters, Volume 16, Issue 15, p. 604 –606
- DOI: 10.1049/el:19800419
- Type: Article
- + Show details - Hide details
-
p.
604
–606
(3)
Analytic closed-form expressions for impedance and effective dielectric constant for coplanar striplines (c.p.s.) with finite substrate thickness are obtained using conformal mapping techniques. The limit, beyond which the results of an infinite dielectric approximation are no longer valid, is presented.
Tuning of transducer elements in transducer array
- Author(s): P.R. Saseendran Pillai and C.S. Sridhar
- Source: Electronics Letters, Volume 16, Issue 15, page: 606 –606
- DOI: 10.1049/el:19800420
- Type: Article
- + Show details - Hide details
-
p.
606
(1)
It is found that the resonance frequencies of various identical transducer elements used in a transducer array differ slightly. Due to this, relatively high power sources are required to radiate a certain amount of power. A possible solution to this problem which can be easily realised in practice for a ceramic transducer array is presented.
Single element controlled oscillator without external capacitors
- Author(s): V.P. Pyara and S.S. Jamuar
- Source: Electronics Letters, Volume 16, Issue 15, p. 607 –608
- DOI: 10.1049/el:19800421
- Type: Article
- + Show details - Hide details
-
p.
607
–608
(2)
The letter presents an active R single element controlled oscillator which requires two operational amplifiers and six resistors for its realisation and is fully integrable. The design procedure is explained and experimental results are given.
Slab waveguide star coupler for multimode optical fibres
- Author(s): K. Nosu and R. Watanabe
- Source: Electronics Letters, Volume 16, Issue 15, p. 608 –609
- DOI: 10.1049/el:19800422
- Type: Article
- + Show details - Hide details
-
p.
608
–609
(2)
The letter proposes a slab waveguide optical star coupler for multimode fibres, and shows the experimental results of a 15-port optical star coupler. The excess loss was about 2 dB and output power deviation among the ports was ±0.5 dB. Although the reported star coupler has 15 ports, there is no limit to the number of ports possible.
Novel submicroampere current-source design technique for monolithic circuits
- Author(s): R.W.J. Barker and B.L. Hart
- Source: Electronics Letters, Volume 16, Issue 15, p. 609 –611
- DOI: 10.1049/el:19800423
- Type: Article
- + Show details - Hide details
-
p.
609
–611
(3)
Using a new circuit technique, particularly suitable for monolithic designs, it is possible to generate predictable, railsupply-insensitive, direct currents at the 10 nA level with a total circuit resistance less than 1 kΩ.
Numerical analysis of radial thin-wire antenna in presence of conducting sphere
- Author(s): B.D. Milovanović
- Source: Electronics Letters, Volume 16, Issue 15, p. 611 –612
- DOI: 10.1049/el:19800424
- Type: Article
- + Show details - Hide details
-
p.
611
–612
(2)
A procedure for efficient summation of the infinite series with slow convergence, appearing in the analysis of radial thin-wire antennas in the presence of a conducting sphere, is presented. By using the planar image theory, a series with modified coefficients, converging faster than the initial one, is obtained
Most viewed content for this Journal
Article
content/journals/el
Journal
5
Most cited content for this Journal
-
Extreme multistability in a memristive circuit
- Author(s): Bo-Cheng Bao ; Quan Xu ; Han Bao ; Mo Chen
- Type: Article
-
Absorptive frequency selective surface using parallel LC resonance
- Author(s): Qiang Chen ; Liguo Liu ; Liang Chen ; Jiajun Bai ; Yunqi Fu
- Type: Article
-
Partial spectral search-based DOA estimation method for co-prime linear arrays
- Author(s): Fenggang Sun ; Peng Lan ; Bin Gao
- Type: Article
-
Experimental verification of on-chip CMOS fractional-order capacitor emulators
- Author(s): G. Tsirimokou ; C. Psychalinos ; A.S. Elwakil ; K.N. Salama
- Type: Article
-
54 Gbit/s OOK transmission using single-mode VCSEL up to 2.2 km MMF
- Author(s): G. Stepniak ; A. Lewandowski ; J.R. Kropp ; N.N. Ledentsov ; V.A. Shchukin ; N. Ledentsov Jr. ; G. Schaefer ; M. Agustin ; J.P. Turkiewicz
- Type: Article
