Online ISSN
1350-911X
Print ISSN
0013-5194
Electronics Letters
Volume 16, Issue 20, 25 September 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 20
25 September 1980
Statistical approach to reduction of circuit performance variability
- Author(s): A. Ilumoka and R. Spence
- Source: Electronics Letters, Volume 16, Issue 20, p. 761 –762
- DOI: 10.1049/el:19800540
- Type: Article
- + Show details - Hide details
-
p.
761
–762
(2)
A statistical method is described for reducing the variance observed in the response of a circuit due to tolerances on circuit parameters.
In-line fibre-optic polariser
- Author(s): W. Eickhoff
- Source: Electronics Letters, Volume 16, Issue 20, p. 762 –764
- DOI: 10.1049/el:19800541
- Type: Article
- + Show details - Hide details
-
p.
762
–764
(3)
A polariser is formed by grinding off the cladding on one side of a single-mode fibre and evaporating metal onto the polished surface. Extinction ratios up to 14 dB between orthogonal polarisations have been realised.
Reactance-loaded short-backfire arrays: new results
- Author(s): S.N. Sinha and R.P. Agarwal
- Source: Electronics Letters, Volume 16, Issue 20, p. 764 –765
- DOI: 10.1049/el:19800542
- Type: Article
- + Show details - Hide details
-
p.
764
–765
(2)
The letter presents experimental data for modified reactance-loaded short-backfire arrays. It is shown that the use of a rectangular subreflector, in conjunction with a half-wave-length rim around the edge of the main reflector, results in a smaller and simpler structure having larger power gain, smaller beamwidth, and lower sidelobe levels.
Unbiased InP detectors in the submillimetre wave region
- Author(s): T. Takada ; T. Makimura ; T. Ishibashi
- Source: Electronics Letters, Volume 16, Issue 20, p. 765 –766
- DOI: 10.1049/el:19800543
- Type: Article
- + Show details - Hide details
-
p.
765
–766
(2)
High sensitivity unbiased detectors employing Ni-nInP Schottky-barrier diodes have been developed in a submillimetre-wave region. The voltage sensitivities of 120 V/W at 300 GHz and 17 V/W at 450 GHz were obtained, which are about three times higher than those of the usually used unbiased Si point contact diode detectors.
Construction of optimal low-rate convolutional codes
- Author(s): G. Whale
- Source: Electronics Letters, Volume 16, Issue 20, p. 767 –768
- DOI: 10.1049/el:19800544
- Type: Article
- + Show details - Hide details
-
p.
767
–768
(2)
A method of constructing low-rate binary convolutional codes suitable for use in frequency-hopped spread-spectrum systems is presented. All constraint lengths from 3 to 11 are considered, and the codes are optimised for Viterbi decoding at low bit error rates.
Polarisation characteristics in long length v.a.d. single-mode fibres
- Author(s): K. Okamoto ; Y. Sasaki ; T. Miya ; M. Kawachi ; T. Edahiro
- Source: Electronics Letters, Volume 16, Issue 20, p. 768 –769
- DOI: 10.1049/el:19800545
- Type: Article
- + Show details - Hide details
-
p.
768
–769
(2)
Polarisation characteristics in long single-mode fibres are investigated. Single-mode fibres used in the experiment have been fabricated by the v.a.d. (vapour-phase axial deposition) method. It was shown from the measurements on a 21 km single-span v.a.d. fibre that the state of polarisation of the incident light beam can be maintained over a long length when the incident plane of polarisation coincides with the major or minor axis of the single-mode optical fibre.
Switched-capacitor immittance convertors using a single operational amplifier
- Author(s): T. Inoue and F. Ueno
- Source: Electronics Letters, Volume 16, Issue 20, p. 770 –771
- DOI: 10.1049/el:19800546
- Type: Article
- + Show details - Hide details
-
p.
770
–771
(2)
The improved switched-capacitor immittance convertors using a single operational amplifier are proposed. The general scheme which enables the conversion of the capacitive (n + 1)-terminal networks into the corresponding bilinearly equivalent networks consisting of LC parallel branches is also proposed.
Band-to-band tunnelling current in Ga0.47 In0.53 As p-n junctions
- Author(s): T.P. Pearsall
- Source: Electronics Letters, Volume 16, Issue 20, p. 771 –773
- DOI: 10.1049/el:19800547
- Type: Article
- + Show details - Hide details
-
p.
771
–773
(3)
The tunnelling current in Ga0.47In0.53As p-n junctions from Zener tunnelling is calculated from the Kane model with no adjustable parameters. This calculation indicates that band-to-band tunnelling becomes an important contribution to the reverse current near breakdown (JR = 10−1 Acm−2) in abrupt p-n junctions for |ND−NA|>6 × 1015 cm−3. Experimental measurements show, however, that band-to-band tunnelling becomes the dominant contribution to the dark current near breakdown for |ND−NA|>4 × 1016 cm−3.
Single-mode fibre pressure sensitivity
- Author(s): A.M. Smith
- Source: Electronics Letters, Volume 16, Issue 20, p. 773 –774
- DOI: 10.1049/el:19800548
- Type: Article
- + Show details - Hide details
-
p.
773
–774
(2)
The pressure-induced retardation in a sample of single-mode fibre cable has been measured. The pressure sensitivity of the uncoated fibre was found to agree with the theoretically expected value. Application of a silicone rubber coating reduced the sensitivity by over 50%. No pressure sensitivity was measured when a loose-fitting tube was extruded around the coated fibre.
Delining thermal imager pictures
- Author(s): J.F. Sherlock
- Source: Electronics Letters, Volume 16, Issue 20, p. 774 –776
- DOI: 10.1049/el:19800549
- Type: Article
- + Show details - Hide details
-
p.
774
–776
(3)
Images produced by current parallel scan thermal imaging systems tend to be overlaid by a periodic pattern of horizontal lines. These are caused by differences in performance between detector-amplifier pairs. A simple digital processing technique is described which considerably reduces the effects of these differences.
Generation and detection of short-duration unipolar stress pulses using poled PVF2 films
- Author(s): S. Kovnovich and E. Harnik
- Source: Electronics Letters, Volume 16, Issue 20, p. 776 –777
- DOI: 10.1049/el:19800550
- Type: Article
- + Show details - Hide details
-
p.
776
–777
(2)
The use of poled PVF2 films for the generation and detection of short-duration stress pulses is described and discussed. The method is very simple and is in particular suitable for the fabrication of very high-resolution ultrasonic probes.
Voltage controlled monolithic s.a.w. phase shifter using m.z.o.s. structure
- Author(s): S. Urabe and S. Uki
- Source: Electronics Letters, Volume 16, Issue 20, p. 777 –778
- DOI: 10.1049/el:19800551
- Type: Article
- + Show details - Hide details
-
p.
777
–778
(2)
A monolithic surface-acoustic-wave (s.a.w.) phase shifter, fabricated with sputtered zinc oxide on an oxidised n silicon substrate, is demonstrated. Almost 67° of voltage controlled phase shift is achieved in 200 acoustic wavelengths of interaction region at 214 MHz.
Single-mode fibre fractional wave devices and polarisation controllers
- Author(s): H.C. Lefevre
- Source: Electronics Letters, Volume 16, Issue 20, p. 778 –780
- DOI: 10.1049/el:19800552
- Type: Article
- + Show details - Hide details
-
p.
778
–780
(3)
We describe new single-mode fibre optic devices which are completely equivalent to fractional wave plates of classical optics. They employ a very simple configuration which uses the stress birefringence induced by bending the fibre. Several devices can be combined to control the polarisation inside any single-mode fibre.
Slotline-microstrip transition on iso/anisotropic substrate: a more accurate design
- Author(s): A. Podcameni and M.L. Coimbra
- Source: Electronics Letters, Volume 16, Issue 20, p. 780 –781
- DOI: 10.1049/el:19800553
- Type: Article
- + Show details - Hide details
-
p.
780
–781
(2)
A method for slotline-microstrip transition using the known pair of stubs is presented. The end reactances are evaluated and cancelled separately under maximum power transfer condition. Computer-aided simulation was implemented for wideband analysis of structures. Compensation of anisotropic effect is carried out.
Brune-section simulation circuits using two operational amplifiers
- Author(s): T. Inoue ; F. Ueno ; Y. Fukuda
- Source: Electronics Letters, Volume 16, Issue 20, p. 781 –782
- DOI: 10.1049/el:19800554
- Type: Article
- + Show details - Hide details
-
p.
781
–782
(2)
New Brune-section simulation circuits using two operational amplifiers are proposed. A first-order allpass filter is constructed as an application using one of these simulation circuits. The measured response coincided closely with the calculated one in the frequency range less than about 10kHz.
Model reduction of discrete-time systems using the schwarz canonical form
- Author(s): E. Badreddin and M. Mansour
- Source: Electronics Letters, Volume 16, Issue 20, p. 782 –783
- DOI: 10.1049/el:19800555
- Type: Article
- + Show details - Hide details
-
p.
782
–783
(2)
The Schwarz canonical form description of a linear discrete-time system will be used to derive reduced-order models which are stable if the original system is stable. Further, the steady-state response of the models to a step input is equal to that of the system.
Single-mode optical fibre switch
- Author(s): C.M. Miller ; R.B. Kummer ; S.C. Mettler ; D.N. Ridgway
- Source: Electronics Letters, Volume 16, Issue 20, p. 783 –784
- DOI: 10.1049/el:19800556
- Type: Article
- + Show details - Hide details
-
p.
783
–784
(2)
A 1 × 4 single-mode optical fibre switch is described which has an insertion loss of less than 0.5 dB with repeatability of ±0.01 dB and crosstalk less than −70 dB.
Sidelobe suppression of s.a.w. resonant filter using twin-turn reflectors
- Author(s): M. Hikita ; Y. Kinoshita ; H. Kojima ; T. Tabuchi
- Source: Electronics Letters, Volume 16, Issue 20, p. 784 –785
- DOI: 10.1049/el:19800557
- Type: Article
- + Show details - Hide details
-
p.
784
–785
(2)
Sidelobe suppression of twin-turn reflector filters is accomplished using longitudinal deformations of i.d.t.s. 41° Y-X LiNbO3 substrate is used, and in experiment the Japanese t.v.i.f. specification is nearly satisfied.
V-DH laser: a laser with a V-shaped active region grown by metalorganic c.v.d.
- Author(s): Y. Mori ; O. Matsuda ; K. Morizane ; N. Watanabe
- Source: Electronics Letters, Volume 16, Issue 20, p. 785 –787
- DOI: 10.1049/el:19800558
- Type: Article
- + Show details - Hide details
-
p.
785
–787
(3)
A single mode c.w. AlxGa1−xAs/GaAs laser was made by metalorganic c.v.d. A double heterostructure with a V-shaped active region and a junction stripe geometry was grown on a groove-etched substrate. The minimum c.w. threshold current and the maximum differential quantum efficiency obtained were 15 mA and 65% (250 μm length cavity). The laser's beam shape was nearly circular, with an aspect ratio from 1.3 to 1.4.
Application of decision feedback equaliser in an environment with narrowband interfering signals
- Author(s): C.K. Pauw
- Source: Electronics Letters, Volume 16, Issue 20, p. 787 –788
- DOI: 10.1049/el:19800559
- Type: Article
- + Show details - Hide details
-
p.
787
–788
(2)
Simulation results on the application of the decision feedback equaliser (d.f.e.) to reject narrowband interfering signals at the p.s.k. carrier frequency are presented. The results indicate that the forward linear equaliser should also have a trailing part operating in parallel with the backward d.f.e.
Reduction of multivariable systems
- Author(s): N.K. Sinha
- Source: Electronics Letters, Volume 16, Issue 20, p. 788 –790
- DOI: 10.1049/el:19800560
- Type: Article
- + Show details - Hide details
-
p.
788
–790
(3)
A simple procedure is presented for obtaining reduced-order models for linear multivariable systems. It does not require the calculation of the eigenvalues, and the stability of the reduced model is guaranteed if the original system is stable. It generalises the Routh approximation method to the multivariable case.
Comment: Frequency/depth-penetration considerations in hyperthermia by magnetically induced currents
- Author(s): J.C. Lin
- Source: Electronics Letters, Volume 16, Issue 20, page: 790 –790
- DOI: 10.1049/el:19800561
- Type: Article
- + Show details - Hide details
-
p.
790
(1)
Reply: Frequency/depth-penetration considerations in hyperthermia by magnetically induced currents
- Author(s): J.H. Young ; M.-T. Wang ; I.A. Brezovich
- Source: Electronics Letters, Volume 16, Issue 20, p. 790 –791
- DOI: 10.1049/el:19800562
- Type: Article
- + Show details - Hide details
-
p.
790
–791
(2)
Erratum: Differential measurement technique for evaluating microstrip line attenuation
- Author(s): L. Accatino and A. Angelucci
- Source: Electronics Letters, Volume 16, Issue 20, page: 791 –791
- DOI: 10.1049/el:19800563
- Type: Article
- + Show details - Hide details
-
p.
791
(1)
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
