Re-programmable PLA

Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons

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Details

364716, 377 54, 377 64, H03K 19177, H03K 19094, H03K 2324, H04Q 300

Patent

active

045089779

ABSTRACT:
This disclosure relates to a programmable logic array having an AND array disposed for receiving n input signals, an OR array providing k output signals on k output lines and m term lines coupling the AND and OR arrays together. New and improved AND and OR arrays are disclosed wherein the AND array includes n X m cells and each cell has first and second transistor means coupled in series between one of the term lines and a reference potential. Each cell includes a storage element that has an output terminal coupled to the control element of the first transistor means and one of the n input terminals is coupled to the control element of the second transistor means. The OR array includes m X k cells wherein each cell has third and fourth transistor means coupled in series between one of said output lines and a reference potential. Each of the OR array cells also includes a storage element having an output terminal coupled to the control element of the third transistor and one of the m term lines is coupled to the control element of the fourth transistor.

REFERENCES:
patent: 3609661 (1971-09-01), Hennes et al.
patent: 3987286 (1976-10-01), Muelhdorf
patent: 4024352 (1977-05-01), Mukaemachi et al.
patent: 4414547 (1983-11-01), Knapp et al.
patent: 4415818 (1983-11-01), Ogawa et al.
patent: 4422072 (1983-12-01), Cavlan
Grice, "Electrically Programmable Logic Array", IBM Tech. Discl. Bull., vol. 22, No. 10, pp. 4621-4622; 3/1980.

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