The one input RS flip flop is the ______ flip flop

This question was previously asked in
IPRC ISRO Technical Assistant Electronics 10 Dec 2016 Official Paper
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  1. T
  2. D
  3. R
  4. Latch

Answer (Detailed Solution Below)

Option 2 : D
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Detailed Solution

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D flip flop :

D flip flop has only one input terminal. The output of the D flip flop will be the same as the input. Hence, it is used in delay circuits.

The circuit is as shown below.

Logic symbol:

F1 U.B Madhu 27.03.20 D9

Truth table:

D

Qn (Present state)

Qn+1 (Next state)

0

0

0

0

1

0

1

0

1

1

1

1

 

The D flip flop may be obtained from an S-R flip flop by just putting one inverter between the S and R as shown in the figure below.

S = R̅

F1 U.B Madhu 27.03.20 D10

∴ The one input RS flip flop is the D flip flop.

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