Programmable logic array for carrying out logic operations of bi

Details Programmable logic array for carrying out logic operations of bi Programmable logic array for carrying out logic operations of bi

1987-05-20

1989-03-21

Malzahn, David H.

Boots, shoes, and leggings

307465, H03K 1920

Patent

active

048150223

ABSTRACT:
A programmable circuit for carrying out logic operations on binary input signals. The programmable circuit contains a matrix of first lines crossed with second lines thereby defining intersections at which logic units corresponding to a function table are connected. Two of the first lines are combined to form a line pair. The matrix is programmed in that a logic unit is connected between one of the lines of the line pair and a second line for the binary value of "1" and a logic unit is connected between the other of the lines of the line pair and the second line for programming a binary value of "0". Utilizing control signals, the logic units can be activated either in one direction or the other. Therefore, it is thus possible to set a line pair either as an input or as an output of the programmable circuit. When a line pair acts as an input, the binary signals coupled into the second lines by the logic units are subjected to an AND operation on the second lines. When a line pair is operated as an output, then the binary signals coupled from the second lines onto the first lines of the line pair by the logic units are subjected to a NOR operation.

REFERENCES:
patent: 3936812 (1976-02-01), Cox et al.
patent: 3975623 (1976-08-01), Weinberger
patent: 4534008 (1985-08-01), Fuchs et al.
Weiss et al., Integrierte Mos-Schaltungen, Springer-Verlag, 1982, pp. 295-298.

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