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Browse Prior Art Database

Memory Using Planar Magnetic Film Cores

IP.com Disclosure Number: IPCOM000095704D
Original Publication Date: 1964-May-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Middlehoek, S: AUTHOR

Abstract

The memory system includes an apertured core made of a planar magnetic film.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 62% of the total text.

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Memory Using Planar Magnetic Film Cores

The memory system includes an apertured core made of a planar magnetic film.

Magnetic film core 10 is disposed on substrate 12, which can be made of electrical conductor or insulator material, and formed as a toroid by any suitable techniques, such as by etching. A first pair of parallel electrically conductive strip lines 14 and 16 is placed over core 10 at opposite sides. A second pair of parallel electrically conductive strip lines 18 and 20 is arranged perpendicular to the first pair of lines 14 and 16 over the core 10 at opposite sides. Lines 18 and 20 extend between the opposite sides of core 10 covered by the first pair of lines 14 and 16.

Conductor 22 passes through core 10 via aperture 24 in substrate 12. A first current source 26 is connected to the first and second pairs of lines 14. 16 and 18, 20 for selectively passing current pulses through these lines. A first switch 28 is operative to connect one end of conductor 22 either to ground or to load 30, which can be any suitable sense amplifier. A second switch 32 is operative to connect the other end of the conductor 22 either to ground or to a second current source 34.

In the operation of the system, to write a bit of information, e. g., a 1, current from source 26 is passed through lines 14, 16, 18 and 20 to produce magnetization in core 10 in a substantially radial direction. Concurrently with the energization of lines 14, 16, 18 and 20, current of a given pol...