It was stated that the 2’s complement of a binary number can be formed by lowing all the least significant 0’s and the first 1 unchanged and complementing all the other higher significant bits, Design a serial 2’s complementer using this procedure. The circuit needs a shift register to store the binary number and an RS flip-flop to be set when the first least significant 1 occurs. An exclusive-OR gate can be used to transfer the unchanged bits($ x \oplus 0 = x$) or complement the bits ($ x \oplus 1 = x’$).
