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Storage Readout With Regeneration

IP.com Disclosure Number: IPCOM000096087D
Original Publication Date: 1964-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 44K

Publishing Venue

IBM

Related People

Mork, RG: AUTHOR

Abstract

This storage device includes a matrix of bistable cores arranged in columns and rows. Data is set into the cores by conventional circuitry. Once data is stored in the matrix, it can be read out word by word and then regenerated by the circuit shown.

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Storage Readout With Regeneration

This storage device includes a matrix of bistable cores arranged in columns and rows. Data is set into the cores by conventional circuitry. Once data is stored in the matrix, it can be read out word by word and then regenerated by the circuit shown.

A magneto assembly is controlled to produce in its coil 1 a negative pulse followed by a positive pulse. The negative pulse is applied to a core column, which stores one word of data, via diode 2, resistor 3 and column selector switch
4. This pulse is at a full-select current level which switches those cores set in the logical 1 state. Switching of a core in turn fires a respective one of semiconductor thyratrons 5, 6 or 7.

Each thyratron which is turned on remains energized. Its cathode-plate current is fixed at the half-select current level. When the positive pulse is generated in 1 shortly later, it is applied to the column of cores via resistors 8 and 3 and switch 4. Resistors 8 and 3 are selected so that this positive pulse is at the half-select current level and insufficient by itself to switch any core to the logical 1 state. This current and the half-select current of an energized thyratron cooperate to reset to the logical 1 state each core which had been switched by the negative pulse from the logical 1 to the logical 0 state.

The thyratrons are de-energized in the normal manner by interrupting the cathode-anode circuit, e.g., by opening switch 9.

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