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

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1 Author(s)

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 two-core circuit is discussed. The introduction of a non-linear resistor enables the same head to be used for recording and reading. Details are given of the construction of a switch matrix for head selection in the main store of an electronic digital computer.

Published in:

Proceedings of the IEE - Part B: Radio and Electronic Engineering  (Volume:104 ,  Issue: 7 )

Date of Publication:

1957

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