# Electrical Engineers, Proceedings of the Institution of

## Volume 122 Issue 10 • October 1975

This issue contains several parts.Go to:  Part R

## Filter Results

Displaying Results 1 - 23 of 23
• ### Identification of loss mechanisms in 3-phase surface-channel charge-coupled devices

Publication Year: 1975, Page(s):1089 - 1091
| | PDF (319 KB)

Measurements of charge-transfer inefficiency have been carried out using 3-phase surface-channel c.c.d.s fabricated on (100) and (111) orientation subtrates. The occurrence of two loss mechanisms, namely backward-flow loss and surface-state loss, is described and the ultimate performance limitations are discussed. View full abstract»

• ### IEE Conference Publication 130. First European Solid State Circuits Conference (ESSCIRC)

Publication Year: 1975
| PDF (166 KB)
• ### Determination of thickness and refractive index of thin transparent multilayer films on silicon from ellipsometric data Computer-program description

Publication Year: 1975, Page(s):1093 - 1094
| | PDF (264 KB)

Ellipsometry is commonly employed to evaluate the thicknesses and refractive indices of thin films grown on silicon. To obviate the use of relatively inaccurate graphical techniques in the calculation of film parameters from ellipsometer readings, a computer program, which solves the appropriate equations iteratively, has been written. The program, in Fortran IV, which was developed, primarily, fo... View full abstract»

• ### Properties of the subsequences of a class of linear product sequences

Publication Year: 1975, Page(s):1095 - 1096
| | PDF (303 KB)

The properties of the subsequences of a class of linear product shift-register sequences are studied. The particular class concerns those derived from two m sequences of relatively prime length. Expressions are presented for the moments of the subsequence weight distribution. The expressions display a systematic relationship between the moments and the characteristic polynomials of the parent mseq... View full abstract»

• ### Study of recursive equalisers for data transmission with a comparison of the performance of six systems

Publication Year: 1975, Page(s):1097 - 1104
Cited by:  Papers (1)
| | PDF (704 KB)

Adaptive and automatic quantised feedback equalisers of telephone lines for data transmission are studied. In particular, equalisers which use a steepest-descent algorithm with a minimum mean square error criterion are considered, and the effect of 2-level quantisation on the mean square error in the steady state and on the conditions of stability are analysed. The effect of the random walkÂ¿ of ... View full abstract»

• ### Quantisation in non-recursive equalisers for data transmission

Publication Year: 1975, Page(s):1105 - 1110
Cited by:  Papers (1)
| | PDF (606 KB)

The effect of 2-level quantisation of the signals within the equaliser on its performance is studied in two cases:(a)when the tap coefficients are updated after every sample of the message, and (b) when the updating is performed after an averaging period equal to the length of a pseudorandom binary signal. In particular, the effect on the stability and the mean square error in the steady state is ... View full abstract»

• ### Quantitative comparison of routing systems

Publication Year: 1975, Page(s):1111 - 1117
| | PDF (1061 KB)

A study is made of various systems used to route interconnections on printed-circuit boards, and methodsof assessing their quality are proposed. Two novel routing systems are suggested for different operating environments. A large number of randomly generated boards are routed by the new and by the existing methods, thus enabling a statistical comparison to be made. A basic theory of board interco... View full abstract»

• ### IEE Conference Publication 131. Telecommunication transmission

Publication Year: 1975
| PDF (142 KB)
• ### Computer-controlled queuing system with switching network and feedback

Publication Year: 1975, Page(s):1118 - 1119
| | PDF (264 KB)

The paper presents an investigation of a computer-controlled queuing system with a switching network, feedback and where blocked customers may become first in the queue, rejoin the end of the queue or leave the system permanently without service. A generating function for stationary-state probabilities of, the necessary and sufficient condition for the existence of statistical equilibrium for, and... View full abstract»

• ### Current-conveyor realisation of transfer function

Publication Year: 1975, Page(s):1119 - 1120
Cited by:  Papers (4)
| PDF (173 KB)
• ### Static torque production in saturated doubly-salient machines

Publication Year: 1975, Page(s):1121 - 1127
Cited by:  Papers (41)
| | PDF (1042 KB)

A new theory is presented for the static reluctance torque produced in a doubly-salient machine when themagnetic circuit is strongly saturated, as occurs, for example, in the majority of stepping motors of modernmanufacture. It is shown that, despite saturation, it is still possible to use linear airgap-permeance data to derive expressions for the optimum proportions of tooth, slot and gap, and to... View full abstract»

• ### Transient performance of eddy-current couplings

Publication Year: 1975, Page(s):1128 - 1136
Cited by:  Papers (2)
| | PDF (1240 KB)

Eddy-current couplings are normally used in conjunction with control systems, yet no transient theory for this machine has previously been published. The constant-slip transient performance is calculated from thedesign information, without using experimental data, and is shown to give good results on a test machine. The damping effects of the solid-iron loss member are shown to be negligible over ... View full abstract»

• ### Discussion on 'Development of a new range of e.h.v. heavy-duty airblast circuit breakers'

Publication Year: 1975, Page(s):1135 - 1136
| PDF (325 KB)
• ### Viscously coupled inertial damping of stepping motors

Publication Year: 1975, Page(s):1137 - 1140
Cited by:  Papers (4)
| | PDF (486 KB)

The discrete-stepping performance of stepping motors, used with viscously coupled inertial dampers, is studied analytically and numerically. Linear and nonlinear system models are employed, and different criteria for optimum performance are considered. Consideration of the envelope of the time response and the integral-of-time-absoluteerror index show that a quite clearly defined optimum exists fo... View full abstract»

• ### Investigation of the transient behaviour of a current-fed autopiloted asynchronous induction machine

Publication Year: 1975, Page(s):1141 - 1145
Cited by:  Papers (2)
| | PDF (469 KB)

The transfer functions associated with an autopiloted current-fed asynchronous induction machine are determined. The parameters influencing the static and dynamic performance are presented. Subsequently, it is shown how these performances are modified by the conditions imposed at the inputs of the group. Finally, a speed regulation is investigated in the case where the machine is fed with the roto... View full abstract»

• ### Long-term-creep assessment for overhead-line conductors

Publication Year: 1975, Page(s):1146 - 1152
Cited by:  Papers (2)
| | PDF (791 KB)

Based on the strain-hardening-material law, a method of long-term-creep prediction is proposed which takes into account all practical line-design and operating conditions and estimates the reduction in conductor tension and the increase in its sag due to creep with acceptable accuracy. Correlation between theory and practice is illustrated by both laboratory and field measurements. Selected exampl... View full abstract»

• ### Choke - capacitor hybrid as a fluorescent-lamp ballast

Publication Year: 1975, Page(s):1151 - 1152
Cited by:  Papers (20)
| PDF (264 KB)
• ### Critical evaluation of online identification methods

Publication Year: 1975, Page(s):1153 - 1158
Cited by:  Papers (1)
| | PDF (656 KB)

Seven different methods for online system identification are discussed and compared for the realistic case when the input-output data are contaminated with noise. The performance of each method is evaluated for different noise-to-signal ratios, for a simulated 2nd-order system, as well as for data obtained from a 2-stage heat-exchanger system under operating conditions. The comparison provides con... View full abstract»

• ### Mixed method for reduction of multivariable systems with various inputs and outputs

Publication Year: 1975, Page(s):1159 - 1160
| PDF (249 KB)
• ### System identification via Walsh functions

Publication Year: 1975, Page(s):1160 - 1161
Cited by:  Papers (8)
| PDF (225 KB)
• ### Time-of-flight electron-swarm studies of ionisation and attachment in gases

Publication Year: 1975, Page(s):1162 - 1165
Cited by:  Papers (1)
| | PDF (499 KB)

A technique has been developed to evaluate ionisation and attachment coefficients for electrons travelling in gases across a uniform electric field by measuring the integrated-anode-current/time profile for a pulse of electrons released from the cathode. The main advantage of the method is that the time-resolved technique clearly distinguishes the current due to delayed effects, such as the arriva... View full abstract»

• ### Method of measuring alternating currents without disturbing the conducting circuit

Publication Year: 1975, Page(s):1166 - 1167
Cited by:  Papers (6)
| | PDF (341 KB)

It is shown that a thin toroidal wormÂ¿ coil which forms a closed loop around a current-carrying conductor can be arranged to give an output voltage proportional to the time rate of change of current. Such a probe can be used to measure currents of any frequency in situations where space is limited without disturbing the conducting circuit in any way. It can therefore not only be a viable alterna... View full abstract»

• ### Effect of the Penning gas on the cathode-fall region of glow discharges

Publication Year: 1975
| PDF (145 KB)

## Aims & Scope

The Proceedings of the Institution of Electrical Engineers was published by the IET between 1963 and 1979.

Full Aims & Scope