Which one of the following circuits converts a JK F/F to a T F/F?

This question was previously asked in
ESE Electronics 2011 Paper 2: Official Paper
View all UPSC IES Papers >
  1. F2 Shraddha Neha 12.12.2020 D3
  2. F2 Shraddha Neha 12.12.2020 D4
  3. F2 Shraddha Neha 12.12.2020 D5
  4. F2 Shraddha Neha 12.12.2020 D6

Answer (Detailed Solution Below)

Option 1 : F2 Shraddha Neha 12.12.2020 D3
Free
ST 1: UPSC ESE (IES) Civil - Building Materials
6.5 K Users
20 Questions 40 Marks 24 Mins

Detailed Solution

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Concept:

T FF truth table

T

Qn

Qn+1

0

0

0

0

1

1

1

0

1

1

1

0

 

JK FF excitation table.

Qn

Qn+1

J

K

0

0

0

X

0

1

1

X

1

0

X

1

1

1

X

0

 

Analysis:

In this question, we want to convert the JK flip-flop into T FF.

Conversion of FF is a 3 step process which is given below.

Step 1:

Construct the characteristic table of TFF (which we want to make) and excitation table of JK FF (which is given)

T

Qn

Qn+1

J

K

0

0

0

0

X

0

1

1

X

0

1

0

1

1

X

1

1

0

X

1

 

Step 2:

Using the K-map find the Boolean expression for J and K in terms of T

F1 Shraddha Neha 22.01.2021 D 1

 

F1 Shraddha Neha 22.01.2021 D 2

\(\left. {\begin{array}{*{20}{c}} {J = T}\\ {K = T} \end{array}} \right\}\)

Step 3:

Construct the circuit diagram

F1 Shraddha Neha 22.01.2021 D 3

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