Design a circuit to detect when 3 and only 3 bits are set
out of 8 bits.(eg. o0101100)

Answer Posted / arnab kumar biswas

2 bit adder will do the trick.give 0 to one i/p.and transmit
the bits serially one by one to the other i/p.o/p of the
adder goes to latch,where it will stay until 8 bits have
come.then use comparator to compare if answer is 3 or not.

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