The given logic circuit represents:

F1 S.B Deepak 03.03.2020 D 1

This question was previously asked in
ISRO VSSC Technical Assistant Electronics 2018 Official Paper
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  1. 4 bit binary to decimal converter
  2. 4 bit decimal to excess-3 code converter
  3. 4 bit binary to Gray code converter
  4. 4 bit decimal to binary converter

Answer (Detailed Solution Below)

Option 3 : 4 bit binary to Gray code converter
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Detailed Solution

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The circuit is redrawn as:

q21

y= x1

y2 = x1 ⊕ x2

y3 = x⊕ x3

y4 = x3 ⊕ x4

Example:

Let the input to the circuit be 1010

∴ For an input 1010, we get the output as 1111.

Similarly, let the input be 0110.

The output for 0110 input is 0101

Observations:

\(1010\xrightarrow{Binary\;to\;Gray} 1111\)

\(0110\xrightarrow{Binary\;to\;Gray} 0101\)

∴ The given circuit converts 4 bit binary to Grey code converter.

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