SR Flip-Flop

SR FLIP-FLOP

BLOCK DIAGRAM:

 

  • When the clock (Clk) input is LOW “0” then there is no change from the output. It does not respond when the clock input is LOW. When we apply the clock HIGH “1” then it works normally and output varies as shown below tables.

 

TRUTH TABLE:

Clk

S

R

Qn+1

0

X

X

Qn

1

0

0

Qn

1

0

1

0

1

1

0

1

1

1

1

Indeterminate State

 

  •  When SR Flip-Flop inputs having 00,01,10 then output shows in these states but in 11 state we cannot determinate the output.
  • 00 – NO CHANGE Operation.
  • 01 – RESET Operation.
  • 10 – SET Operation.
  • 11 – Indeterminate State

CHARACTERISTIC TABLE:

S

R

Q

Qn+1

0

0

0

0

0

1

0

0

1

0

0

1

1

1

0

Indeterminate State

0

0

1

1

0

1

1

0

1

0

1

1

1

1

1

Indeterminate State

 

CHARACTERISTICS EQUATION:

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