Mathematics Pocket Book for Engineers and Scientists by Bird John;

Author:Bird, John;
Language: eng
Format: epub
Publisher: CRC Press LLC
Published: 2008-04-15T00:00:00+00:00

by putting 1’s in the cells corresponding to the Boolean terms on the right of the Boolean equation and 0’s in the remaining cells. This method of depicting a four-variable expression is called a four-variable Karnaugh map, and is shown in Table 92.3(c).

To simplify a four-variable Boolean expression, the Boolean expression is depicted on a Karnaugh map as outlined above. Any cells on the map having common edges either vertically or horizontally are grouped together to form couples of eight cells, four cells or two cells. During coupling, the horizontal lines at the top and bottom of the cells may be considered to be common edges, as are the vertical lines on the left and the right of the cells. The simplified Boolean expression for a couple is given by those variables common to all cells in the couple.

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