Graduate Thesis Or Dissertation
 

Signal transfer and gain in magnetic-core circuits

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/nc580p714

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  • Because of its characteristics, the square-loop magnetic core can be used as the basic device in a logic system. A magnetomotive force (mmf) which is below the threshold mmf of such a core will cause a negligible, nonpermanent amount of flux change in the core; and information signals can be distinguished by the amount of flux change they produce in the core. The remanent flux in a magnetic core can be in the clockwise or counterclockwise direction, and the binary information signals ONE and ZERO can be represented by these two directions of flux. The transfer of information in a logic system will introduce noise and cause losses, and the ability of the circuits in a system to respond properly to degraded signals will be determined largely by the transfer characteristics of the circuits. The transfer process is shown to be basically identical for three examples of magnetic-core shift registers, and it is shown that there must be an imbalance of the number of turns on the windings in the coupling loop between a transmitting and a receiving core. For economic reasons this winding imbalance is undesirable, and a circuit requiring only single-turn windings in the coupling loop is proposed. An experimental investigation of the proposed circuit showed that its transfer characteristics are determined by the resistance and inductance in the coupling loop and the amplitude of the current pulse driving the circuit. Voltage waveforms of the circuit seem to indicate that the inductance, which is normally assumed to be detrimental to the circuit operation, might have an optimum value which would be beneficial to the transfer process.
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file details LandgrafRichardC1965.pdf 2017-08-04 Público Descargar