Browse Prior Art Database

Storage Device

IP.com Disclosure Number: IPCOM000097528D
Original Publication Date: 1961-Jan-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Wolff, HP: AUTHOR

Abstract

This multipath core operates in response to sequentially applied pulses.

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Storage Device

This multipath core operates in response to sequentially applied pulses.

The core is initially reset with legs 1 and 2 saturated upwardly and legs 3 and 4 saturated downwardly. If it is desired to store information in response to a WRITE pulse, the core is preconditioned by applying a COCK pulse to winding C in the direction shown. As shown in the chart WRITE 1 (COCKED), this pulse reverses the flux in legs 2 and 3. The COCK pulse is limited in amplitude to avoid switching legs 1 and 4. The WRITE pulse, subsequently applied to winding W, reverses the flux in leg 1 and returns leg 2 to its initial condition, This pulse is also limited in amplitude to avoid the possibility of switching a path encompassing more than the first aperture.

Following the WRITE pulse, the information is fixed by an UNCOCK pulse applied to the winding C in the direction shown. This pulse is limited in amplitude to affect only legs 2 and 3. When a 1 has been stored during WRITE time, it has no effect.

A READ pulse (not limited in amplitude), applied to the winding R, returns the core to its initial state by reversing legs 1 and 3. An output is induced in the sense winding by this flux change.

The chart WRITE 0 (COCKED) shows the flux patterns created when the above-described sequence is carried out in the absence of a WRITE input. As shown, the UNCOCK pulse returns the core to its reset state and no change in flux is produced during READ time.

If a WRITE pulse is applied at a...