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SEQUENCE: 000,101,111,110,100,001...REPEAT

DESIGNED WITH T FF

NEXT STATE TABLE

C

B

A

C+

B+

A+

0

0

0

1

0

1

0

0

1

0

0

0

0

1

0

-

-

-

0

1

1

-

-

-

1

0

0

0

0

1

1

0

1

1

1

1

1

1

0

1

0

0

1

1

1

1

1

0

 Tc=A'B'

Tb=AC

Ta=AB+A'B'+C'

Implementation of 4-BIT ASYNCHRONOUS UP COUNTER using Flip FLops

Implementation of a 4 BIT Asynchronous Counter using JK FLIP-FLOPS and T-FLIP FLOPS

WHEN 'UP' INPUT IS LOW, IT IS UP COUNTER AND WHEN 'UP' INPUT IS HIGH, IT ACTS AS DOWN COUNTER.