Browse Prior Art Database

Selection of Information in a Dual Frequency Memory

IP.com Disclosure Number: IPCOM000096375D
Original Publication Date: 1963-Apr-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

West, LE: AUTHOR

Abstract

In a dual frequency memory system, core lines can be selected by appropriate selection of a corresponding parametron. In parametrons such as 1, 2 and 3, each has a pair of magnetizable cores such as 4 and 5. Biasing coils 6 and 7 are wound on the respective cores and the pairs of such windings are all connected in series. The last coil is connected to arm 8 of selector switch 9. Each parametron has a further winding such as 10 and 11 on each of the cores. These are respectively connected in series between ground and a contact point of switch 9.

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Selection of Information in a Dual Frequency Memory

In a dual frequency memory system, core lines can be selected by appropriate selection of a corresponding parametron. In parametrons such as 1, 2 and 3, each has a pair of magnetizable cores such as 4 and 5. Biasing coils 6 and 7 are wound on the respective cores and the pairs of such windings are all connected in series. The last coil is connected to arm 8 of selector switch 9. Each parametron has a further winding such as 10 and 11 on each of the cores. These are respectively connected in series between ground and a contact point of switch 9.

For selecting any parametron, arm 8 is positioned on the corresponding contact. A series circuit is then established through line 12, all of the windings corresponding to 6 and 7, and only one pair of windings such as 10 and 11. If a saturating current is passed through this circuit and the windings 10 and 11 produce arms opposing those of windings 6 and 7, all cores except those of the parametron which is selected by switch 9 are saturated. They are unresponsive to high frequency signals on line 13 while the cores of the selected parametron are not saturated and are responsive to such signals. Only the parametron with nonsaturated cores is operative.

The function of selector switch 9 can also be performed by relay circuitry or an electronic switching network.

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