Browse Prior Art Database

Read-Only Memory

IP.com Disclosure Number: IPCOM000097161D
Original Publication Date: 1962-Jun-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 82K

Publishing Venue

IBM

Related People

Owen, CE: AUTHOR [+3]

Abstract

The memory comprises an array of sixty-four soft-core transformers 1 arranged around the periphery of a circular insulating support 2. This also carries on one face a printed array of horizontal selecting conductors R and selecting diodes D. On the other face there is a corresponding array of vertical selecting conductors and diodes.

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Read-Only Memory

The memory comprises an array of sixty-four soft-core transformers 1 arranged around the periphery of a circular insulating support 2. This also carries on one face a printed array of horizontal selecting conductors R and selecting diodes D. On the other face there is a corresponding array of vertical selecting conductors and diodes.

In the circuit, the transformer cores are shown as elongated strips C(0)... C(64). Horizontal selecting conductors R(0)... R(31) are arranged to co-operate in matrix fashion with vertical selecting conductors A(0)... A(31). Such define 1024 intersections, at each of which is placed a series combination of a primary winding P(0)... P(1023) and a diode D. Each primary winding threads or by- passes the transformer cores in a unique combination. Thus, when the associated pair of horizontal and vertical conductors is energized, a pattern of outputs is developed in secondary windings S(0)... S(64) coupled one to each core.

Each transformer core comprises a U-shaped member 18 and an I-shaped member 16. The periphery of the support 2 is slotted to accommodate nylon bushings 14 shaped to receive the cores. A primary winding is first anchored to a post 10 associated with the appropriate selecting conductor. It is then taken around the periphery of the support, passing either through the aperture left for the transformer core or bypassing the aperture according to the control pattern desired.

When the wire has traversed all the...