Sequential Logic Circuits

What happens to the parallel output word in an asynchronous binary down counter whenever a clock pulse occurs?

A The output word decreases by 1.

B The output word decreases by 2.

C The output word increases by 1.

D The output word increases by 2.

ANS:A - The output word decreases by 1.

In an asynchronous counter, there isn\'t any clock input. The output of 1st flip-flop is given to second flip-flop as clock input. So, in case of binary down counter the output word decreases by 1.

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