Electronics-Digital Electronics: Boolean Identities [IAS (Admin.) Mains Physics]: Questions 1 - 3 of 3

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Question 1

Appeared in Year: 2015

Write in Short Short Answer▾

Simplify the logical expression (10 Marks)

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Question 2

Appeared in Year: 2007

Describe in Detail Subjective▾

Give the Boolean expression and the truth table for an XOR gate. Why NAND gates are called universal gates? Realise OR and XOR gates employing only NAND gates.

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Explanation

The circuit of an exclusive – OR gate is shown in Fig (1a) . As obvious, there are two inputs and one output. The exclusive – OR operation is denoted by . Hence the expression for the output of the circuit is give as

… (212 more words, 26 figures) …

Question 3

Appeared in Year: 2011

Describe in Detail Subjective▾

Simplify the logical expression B and draw the logical circuit to implement it. (Mark: 15)

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Explanation

  • De- Morgan՚s laws are commonly written as and
  • Where. is the logical AND.
  • + is the logical OR.
  • The

… (61 more equations, 11 figures) …