Ferrite Matrix

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Ferrite Matrix


a component of a computer memory unit, in the form of a rectangular frame of insulating material within which are placed ferrite cores threaded by insulated wires. The wires are connected to lead-out contacts in one or two rows along the sides of the frame. The frame may consist of two parts: one for the placement of the address-decoding elements of the memory cells (transistors, pulse transformers, semiconductor diodes, and resistors) and one for the memory elements, or ferrite cores, which may number as many as several tens of thousands in a single matrix.

The arrangement of cores and wires in a ferrite matrix depends on the organization of the access (the scanning for a required cell) and the information reading and writing operations. When a ferrite matrix is designed, particular attention is given to reducing the electrical interference created in the wires by the presence of inductive and capacitive couplings. In order to reduce or compensate the interference, the writing and reading wires or windings may be grouped in sections or laid out according to a specially developed plan. Two, three, or four wires may be threaded through the cores, depending on the organization adopted for the access.

The principal requirements imposed on a ferrite matrix are minimum reactances in the access, writing, and reading windings in order to shorten the signal transmission time within the windings; maximum reliability for the contacts, soldered connections, insulation (especially where wires intersect), and cores; interchangeability; and the possibility of threading the cores automatically.


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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Therefore, the residual austenite transformed into the retained austenite or M-A island that was distributed within the ferrite matrix. Subsequently, the lath and granular bainite microstructures were generated [16,17].
Therefore, the residual austenite transforms into the M-A island that is distributed within the ferrite matrix. Subsequently, the lath and granular bainite microstructures are generated.
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Above the austenitization temperature of 900[degrees]C, the microstructure contained more globular bainite rather than the lath bainite typical for lower austenitization temperatures and the bainite microstructure is much finer and more uniformly distributed throughout the ferrite matrix. Prolonging the holding times at lower austenitization temperatures leads to the formation of lath bainite as well.
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