Q.1. What are Logic Gates? Ans.: A digital computer uses binary number system for its operation. In the binary system there are only 2 digits, 0 and 1. The manipulation of binary information is done by logic circuit known as logic gates. The important logical operations which are frequently performed in the design of a digital system are: (1) AND (2) OR (3) NOT (4) NAND (5) NOR and EXCLUSIVE OR. An electronic circuit which performs a logical operation is called a logic gate. Q.2. Explain design of digital multiplexer. Ans.: A digital multiplexer has N inputs & only one output. By applying control signals any one input can be made, available at the output terminal. It‟s called data sector. Q.3. What are Combinational & Sequential Circuits? Ans.: There are two types of logic circuits, Combinational & Sequential. A combinational circuit is one in which the state of the O/P at any instant is entirely determined by the states of the I/P‟s at that time. Combination...
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