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A Magneto Elastic Resonance NDRO Device

IP.com Disclosure Number: IPCOM000093513D
Original Publication Date: 1967-Oct-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Probst, RE: AUTHOR

Abstract

A ferrite memory storage core is provided which employs the resonant frequencies of the toroidal cores to obtain nondestructive readout. The core is set to a given flux state by a current pulse. The RF current is then swept through the resonant frequency. A sense wire is passed through the core and is fed to a narrow-band detection system. The mechanical resonance condition manifests itself as an amplitude modulation of the sense signal. Since the resonance and hence the modulation is a function of the flux state which is originally set into the core, the device is usable as a storage information core. If the swept RF current is kept smaller than the threshold current, the RF current does not change the flux state of the core. Thus, the device can be used as a nondestructive readout storage element.

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A Magneto Elastic Resonance NDRO Device

A ferrite memory storage core is provided which employs the resonant frequencies of the toroidal cores to obtain nondestructive readout. The core is set to a given flux state by a current pulse. The RF current is then swept through the resonant frequency. A sense wire is passed through the core and is fed to a narrow-band detection system. The mechanical resonance condition manifests itself as an amplitude modulation of the sense signal. Since the resonance and hence the modulation is a function of the flux state which is originally set into the core, the device is usable as a storage information core. If the swept RF current is kept smaller than the threshold current, the RF current does not change the flux state of the core. Thus, the device can be used as a nondestructive readout storage element.

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