Browse Prior Art Database

Memory Drive System

IP.com Disclosure Number: IPCOM000092625D
Original Publication Date: 1966-Dec-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Caricari, CA: AUTHOR [+2]

Abstract

Lines 2 thread magnetic cores in a memory. Power for energizing a selected line 2 is provided by pulse sources 3 and 4. The latter provide current in opposite polarities for read and write operations. Each pulse source is transformer coupled to an upper transistor network and a lower transistor network. The transistors are controlled to connect one source to a selected line for a read operation and then to connect the other source to the same line for a write operation.

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Memory Drive System

Lines 2 thread magnetic cores in a memory. Power for energizing a selected line 2 is provided by pulse sources 3 and 4. The latter provide current in opposite polarities for read and write operations. Each pulse source is transformer coupled to an upper transistor network and a lower transistor network. The transistors are controlled to connect one source to a selected line for a read operation and then to connect the other source to the same line for a write operation.

Groups of lines 2 are connected at the lower end to one of several conductors 5. Each line 5 has an individual transistor T6 connecting it to the lower terminal of source 3 and a second transistor T7 connecting it to the lower terminal of source 4. Each line 2 has an individual diode D9 connecting it to a line 13 and an individual diode D12 connecting it to a line 14. The two lines 13 and 14 illustrate several such pairs of conductors. Each line 13 has an individual transistor T15 connecting it to the upper terminal or source 3. Similarly, individual transistors T16 connect each line 14 to the upper terminal of source 4.

For each line 2 there is a unique T6 and T15 pair that connects only that conductor to be energized from source 3. Similarly a unique T7 and T16 pair connects that line to source 4. D9 and D12 isolate other conductors from the selected conductor. Transformer circuits, not shown. couple the bases and emitters of T6, T7, T15, and T16 to circuits that select the transistors for the l...