Dual emitter programmable memory element and matrix

Details Dual emitter programmable memory element and matrix Dual emitter programmable memory element and matrix

1974-01-07

1976-07-20

Wojciechowicz, Edward J.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

357 45, 340173SP, G11C 1144, H01L 2972, H01L 2710

Patent

active

039710580

ABSTRACT:
A plurality of dual emitter integrated circuit transistor elements in a single substrate having emitters interconnected to form a matrix is programmed by passing current between emitters of selected elements to short one base-emitter junction or to short one emitter to base and collector. A programmed ROM has a programmed bit electrically represented by a transistor and an unprogrammed location electrically represented by back-to-back transistors. Alternative programming of a bit or address may provide a diode connection for a programmed matrix bit and furthermore may provide an extremely short or low storage time for a programmed matrix bit diode.

REFERENCES:
patent: 3735358 (1973-05-01), Ho
patent: 3784976 (1974-01-01), Ho
patent: 3801967 (1974-04-01), Berger et al.

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