# Unit 01-Logic Simplification and Combinational Logic Design | Digital System Design AKTU B.tech

In This Blog, We are discussing for Top 5 important questions with solution in Digital System design AKTU B.Tech. Unit-01 Logic Simplification and Combinational Logic Design.

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Important Questions For Digital System Design:
*Unit-01     *Unit-02
*Unit-03    *Unit-04
*Unit-05    *Short-Q/Ans
*Question-Paper with solution 21-22  ```

## Q1. Design a combinational circuit that converts a BCD code to excess-3 code.

1.The maps in Fig. 14.1, are plotted to obtain simplified boolean function for the outputs.

2. The boolean expressions created from the maps can be used to directly generate a two-level logic diagram of each output.

Maps for BCD to excess-3 code converter.

## Que 3. Simplify the Boolean function.

F (w, x, y, z) = Σm(1,3,7, 11, 15)

which has the don’t care conditions

d (w, x, y, z) = Σd(0, 2, 5)

1. F(w, x, y, z) = Σm(1, 3, 7, 11, 15)

and don’t care conditions

d(w, x, y, z) = Σd(0, 2, 5)

## Q4. Simplify the boolean function Y together with don’t care condition d using K-map and implement it with two level NAND gate circuit.

Y= BD+ BCD+ ABCD