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Digital Electronics

Q1:

A 4 bit ripple counter starts in 0000 state. When the counter reads 0010 the number of clock pulses which have occurred is

A 2

B 18

C 2 or 18

D 2 or 18 or 34

ANS:D - 2 or 18 or 34

At pulse 1 the state changes to 0001 and at pulse 2 it changes to 0010 Since it has a total of 16 states, the counter returns to 0000 after 16 and 32 pulses.



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