Online ISSN
1350-911X
Print ISSN
0013-5194
Electronics Letters
Volume 11, Issue 6, 20 March 1975
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Volume 11, Issue 6
20 March 1975
Node elimination in linear active circuits
- Author(s): M.G. Rezai-Fakhr and G.C. Temes
- Source: Electronics Letters, Volume 11, Issue 6, p. 121 –122
- DOI: 10.1049/el:19750091
- Type: Article
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–122
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A method is described for the elimination of nodes in a linear circuit containing dependent and independent sources. The connection between this operation and a cycle of Gaussian elimination in the nodal analysis of the circuit is also established. The node-elimination process uses an extension of Versfeld's method the identification with the Gaussian cycle is based on Calahan's work.
Design of digital controllers for multivariable stochastic systems
- Author(s): S.I. Ahson and H. Nicholson
- Source: Electronics Letters, Volume 11, Issue 6, p. 122 –123
- DOI: 10.1049/el:19750092
- Type: Article
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–123
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A new approach for designing controllers for randomly disturbed interactive multivariable systems is proposed. This is based on an extension of the inverse-Nyquist-array method and the minimum variance control strategy for single-input/single-output systems.
Optical Barker sequences and self-orthogonal convolutional codes
- Author(s): P.S. Moharir
- Source: Electronics Letters, Volume 11, Issue 6, page: 124 –124
- DOI: 10.1049/el:19750093
- Type: Article
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The relation between optical Barker codes and self-orthogonal convolutional codes is pointed out. It is then used to update the results in earlier publication.
Eigenvalue/eigenvector assignment for multivariable systems
- Author(s): S. Srinathkumar and R.P. Rhoten
- Source: Electronics Letters, Volume 11, Issue 6, p. 124 –125
- DOI: 10.1049/el:19750094
- Type: Article
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A procedure is described which, through linear state feedback, both assigns pole locations (eigenvalues) and specifies parts of the closed-loop modal (eigenvector) structure. The technique is illustrated by synthesising a controller for the lateral dynamics of a high-performance aircraft.
Wideband negative-current mirror
- Author(s): B. Gilbert
- Source: Electronics Letters, Volume 11, Issue 6, p. 126 –127
- DOI: 10.1049/el:19750095
- Type: Article
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A new wideband negative-current mirror is described
Transducer bonding with primed anaerobic acrylate sealant
- Author(s): R.L. Rosenberg
- Source: Electronics Letters, Volume 11, Issue 6, p. 127 –128
- DOI: 10.1049/el:19750096
- Type: Article
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–128
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A technology with novel characteristics is described for bonding a transducer plate to a delay line. Experiments near 20 MHz show that the total insertion loss can be quite low for delay lines with acoustic apertures below 1 mm2.
Helical line with latching ferrite cylinder
- Author(s): K.P. Ivanov and K.G. Kostov
- Source: Electronics Letters, Volume 11, Issue 6, p. 128 –130
- DOI: 10.1049/el:19750097
- Type: Article
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The characteristic equation of a thin-wire helical line, wound on a latching ferrite cylinder, magnetised azimuthally to remanence and surrounded by unbounded homogeneous magnetodielectric is derived. Curves based on numerical solution of the characteristic equation for a variety of material and structure parameters and opposite directions of remanent flux are presented, showing the nonreciprocal behaviour of the system.
T.L.M. analysis of the dispersion characteristics of microstrip lines on magnetic substrates using 3-dimensional resonators
- Author(s): S. Akhtarzad and P.B. Johns
- Source: Electronics Letters, Volume 11, Issue 6, p. 130 –131
- DOI: 10.1049/el:19750098
- Type: Article
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The dispersion characteristic for a microstrip line on an isotropic magnetic substrate is calculated by the t.l.m. method. The results indicate how errors obtained using approximate TEM analysis vary with frequency. The results also serve to demonstrate the versatility of the 3-dimensional t.l.m. program.
Very wideband corrugated horns
- Author(s): Zvi Frank
- Source: Electronics Letters, Volume 11, Issue 6, p. 131 –133
- DOI: 10.1049/el:19750099
- Type: Article
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An expression for the input impedance of a short-circuited, linearly-tapered transmission line is derived. The use of tapered slots in a corrugated horn is proposed as a means of broadening their bandwidth to greater than 3:1. Test results are presented for an experimental horn operating over the full 7.5–18 GHz range of DR14 waveguide.
Transfer-function measurements on an engine suspension: a simple method for signal analysis
- Author(s): M. Garrigues and J.J. Urgell
- Source: Electronics Letters, Volume 11, Issue 6, p. 133 –134
- DOI: 10.1049/el:19750100
- Type: Article
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Frequency-response analysis in a noisy environment can be carried out by only two phase-sensitive detectors. The very good noise rejection given by this procedure allows the use of an original excitation technique to identify the transfer function of an engine suspension.
Realisation of open-circuit voltage-transfer matrices by grounded nullors
- Author(s): B.B. Stamenković
- Source: Electronics Letters, Volume 11, Issue 6, p. 134 –136
- DOI: 10.1049/el:19750101
- Type: Article
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A general synthesis procedure is presented that proves the following theorem: an arbitrary m × n matrix of real rational functions of the complex frequency variable can be realised as the open-circuit voltage-transfer matrix of a grounded transformerless active RC (n + m)-port network containing no more than m + 1 grounded nullors, where n and m are the numbers of the input and output ports, respectively.
Erratum: Translinear circuits: a proposed classification
- Author(s): B. Gilbert
- Source: Electronics Letters, Volume 11, Issue 6, page: 136 –136
- DOI: 10.1049/el:19750102
- Type: Article
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Erratum: Equivalent network for bridged crystal filters
- Author(s): Man Shek Lee
- Source: Electronics Letters, Volume 11, Issue 6, page: 136 –136
- DOI: 10.1049/el:19750103
- Type: Article
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