LTE - 4G Wireless Technology

Digital fundamentals.

Interview Questions.

Above is a common format of representing the K-map problems. The numbers 0,1,6,7 are the location of cells in the 3-var k-map table discussed below.  3 variable K– map with 1 and 0 values assigned to cells is shown in table below.

The K-map for 3 variables is plotted above. You will notice the column for 11 and 10 is inter-changed. This is done to allow only one variable to change across adjacent cells. This adjustment in columns allows in minimization of logic mapped into tables.

Any adjacent 2, 4 or 8 cells can be grouped to find a minimized logic value. Following plot will show grouping of adjacent cells.

The two step minimization equation is shown below.
With reference to the table above the cells under the dotted box’s can be combined to come-up with following reduced  equation.

F = x’y’(z+z’) + xy(z+z’)
F= x’y’ + xy .. Final Answer.

More example below:

2. F(x,y,z) = (0,1,4,5,6,7) - Access minimization from here.
3. F(x,y,z) = (3,4,6,7) - Access minimization from here.
4. F(x,y,z) = (0,1,2,3,4,5,6,7) - Access minimization from here.

Tutorials `@fullchipdesign.com`

Verilog Tutorial.

LTE Tutorial.

Memory Tutorial.

Hope you liked! this page. Don't forgot to access relevant `previous and next sections ` with links below.