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# Proceedings of the IEE - Part B: Radio and Electronic Engineering

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Displaying Results 1 - 25 of 32
• ### Introduction to the three sessions on square-loop materials and their applications

Publication Year: 1957
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First Page of the Article
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• ### The influence of chemistry on B/H loop shape, coercivity and flux-reversal time in ferrites

Publication Year: 1957, Page(s):400 - 411
Cited by:  Papers (1)
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The factors which influence the shape of the B/H loop, the coercivity, the permeability and the flux-reversal time in ferrimagnetic spinels are considered on two levels; a macroscopic and an atomic level. To minimize consideration of shape-dependent properties, the ferrite components are assumed to be toroids. With the assumption that domain walls are present in the material, coercivity, permeabil... View full abstract»

• ### Ordering in cobalt-ferrous ferrites

Publication Year: 1957, Page(s):412 - 417
Cited by:  Papers (1)
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Various cobalt-ferrous ferrites show a constricted hysteresis loop. After magnetic annealing of the samples the loop becomes rectangular. It appears that the magnetic annealing creates in each crystal a uniaxial anisotropy in a direction which is not necessarily the direction of the applied magnetic field but a crystallographic direction nearest to it. It is suggested that directional ordering is ... View full abstract»

• ### Square-loop ferrites obtained by magnetic annealing of new compositions

Publication Year: 1957, Page(s):418 - 421
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First Page of the Article
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• ### Pulse-response properties of rectangular-loop ferrites

Publication Year: 1957, Page(s):422 - 427
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An analysis of the voltage pulses obtained across a secondary winding of a ferrite core on reversing the magnetization shows that in the reversal two stages should be distinguished, namely a fast response, related to a magnetization by rotations, and a slower response due to the displacements of domain walls. The viscous movement of the domain walls determines the switching time of the core. It ap... View full abstract»

• ### Ferrites with constricted loops and thermal magnetic treatment

Publication Year: 1957, Page(s):428 - 432
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After comparing the different types of magnetic hysteresis loop of metallic ferromagnets and non-metallic ferrites, the existence of constricted loops in ferrites containing cobalt oxide is pointed out. The necessary prerequisites in achieving loops of this type are presented, and their field and temperature dependence are demonstrated. In full analogy with metallic ferromagnets of the Perminvar t... View full abstract»

• ### Discussion on 'Square-loop materials' at the Convention on Ferrites, 31st October, 1956

Publication Year: 1957, Page(s):433 - 434
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• ### The authors' replies to the discussion on Â¿Square-loop materialsÂ¿

Publication Year: 1957, Page(s):434 - 435
Cited by:  Papers (1)
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• ### A magnetic-core matrix store with direct selection using a magnetic-core switch matrix

Publication Year: 1957, Page(s):436 - 444
Cited by:  Papers (3)
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The paper describes the magnetic-core matrix store developed for a large high-speed digital computer, Edsac II. The store has a direct selection system for reading, and the access switch using a matrix of switch cores is described. The results of measurements to find the optimum operating conditions for the storage cores used are given, and circuit details of the storage unit are included. Design ... View full abstract»

• ### The magnetic cell: a new circuit-element

Publication Year: 1957, Page(s):445 - 456
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The paper describes the properties of the circuit element formed by a wire passing through a hole in a block of rectangular-hysteresis-loop ferrite. This element is considered in relation to a small core of the same material, first as a storage element and secondly as a gating element. View full abstract»

• ### A matrix store for data rate conversion

Publication Year: 1957, Page(s):457 - 463
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A description is given of a parallel-access ferrite-core store which forms part of a data-handling system. The storage capacity is 13750 binary digits. In any 10sec period, up to 625 words of 22 digits each can be written into the store at a random rate, and over the same period, the information in the 625 storage positions is read out sequentially and destructively at a fixed rate. Thus, conversi... View full abstract»

• ### A ferrite-core switch-matrix for magnetic-recording-head selection

Publication Year: 1957, Page(s):464 - 469
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The simple circuit of a rectangular-hysteresis-loop core driving an inductance is discussed. Cores may be used as saturable transformers, the power transfer being inhibited by the application of a steady bias. Methods of pulse modulation requiring current in a recording head of either direction require two cores associated with each head if this property is used for selection. The operation of the... View full abstract»

• ### A 1000-channel neutron-velocity spectrometer using ferrite data storage

Publication Year: 1957, Page(s):470 - 480
Cited by:  Papers (1)
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The paper describes the electronic sorting and counting equipment for a spectrometer using time of flightÂ¿ techniques in the energy range 1Â¿1000eV, the neutron source being a nuclear reactor in conjunction with a mechanical shutter. This provides bursts of neutrons at about 0Â·25microsec duration and 1000pulses/sec repetition rate. After passing through the test specimen, the neutrons are sorte... View full abstract»

• ### Discussion on 'Square-loop applicationsߝI' at the Convention on Ferrites, 1st November, 1956

Publication Year: 1957, Page(s):481 - 482
| PDF (356 KB)
• ### The authors' replies to the discussion on Â¿Square-loop applicationsÂ¿IÂ¿

Publication Year: 1957
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• ### Introduction to the Session on Square-Loop ApplicationsÂ¿II

Publication Year: 1957, Page(s):483 - 484
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First Page of the Article
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• ### A digital computer based on magnetic circuits

Publication Year: 1957, Page(s):485 - 490
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The paper discusses in some detail that part of a digital computer, Decca Cl, which has been built with squareÂ¿ hysteresis-loop ferrite cores. This part of the computer comprises the arithmetic and controlling circuits and the storage registers. The development of three basic logical circuits is indicated, and there is some discussion of the behaviour of these circuits. Designs of the basic circ... View full abstract»

• ### Some applications of square-loop ferrite cores in telecommunication switching circuits

Publication Year: 1957, Page(s):491 - 501
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After an introductory discussion of the importance of electronic switching for certain functions in telephone and telegraph exchanges, the paper sets out the principles of switching with square-loop ferrite cores and the advantage of their use in combination with transistors. Various examples are given of the use of square-loop ferrite cores in telecommunication switching circuits. They refer part... View full abstract»

• ### The application of square-loop ferrite material in data-processing systems

Publication Year: 1957, Page(s):502 - 511
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Digital computing systems using very small ferrite cores have been developed because of the rapidity with which data can be inserted or withdrawn. The paper describes other applications of ferrite material in data-processing systems, either as toroidal cores or as blocks which are subdivided into a number of independent cells by drilling holes through which the controlling circuit connections are ... View full abstract»

• ### A core-transistor logical element

Publication Year: 1957, Page(s):512 - 522
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The paper describes a square-loop magnetic-core/junction-transistor circuit-element which is suitable for operation in complex logical systems at medium digit rates. Temporary storage between logical operations is obtained by virtue of the remanent property of the core. Use is made of the constant-current pulse from each stage and the field threshold of the material to provide a number of the elem... View full abstract»

• ### Discussion on 'Square-loop applicationsߝII' at the Convention on Ferrites, 1st November, 1956

Publication Year: 1957, Page(s):523 - 524
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• ### The authors' replies to the discussion on Â¿Square-loop applicationsÂ¿IIÂ¿

Publication Year: 1957, Page(s):524 - 525
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• ### Some current and future applications for ferrite components in radio and television receivers

Publication Year: 1957, Page(s):526 - 533
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• ### The application of soft magnetic ferrites in television-receiver line-scanning circuits

Publication Year: 1957, Page(s):534 - 537
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First Page of the Article
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• ### Discussion on "Radio and television applications" at the Convention on Ferrites, 31st October, 1956

Publication Year: 1957, Page(s):538 - 539
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