2 votes 2 votes How many half adders are required to realize the following $4$ functions? $f_1=A\oplus B\oplus C$ $f_2=\overline{A}BC+A\overline{B}C$ $f_3=AB\overline{C}+(\overline{A}+\overline{B})C$ $f_4=ABC$ Digital Logic combinational-circuit + – richa116 asked Nov 27, 2015 richa116 1.2k views answer comment Share Follow See all 2 Comments See all 2 2 Comments reply Hira Thakur commented Jan 2, 2017 reply Follow Share how to solve f2,f3,f4??? 0 votes 0 votes Pavan Kumar Munnam commented Jan 3, 2017 reply Follow Share 3 half adders are required 0 votes 0 votes Please log in or register to add a comment.
0 votes 0 votes all the above functions f1,f2,f3,f4 can be realized using 2 H.A circuit. abhishek14893 answered Dec 23, 2016 • edited Jul 21, 2017 by abhishek14893 abhishek14893 comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes f2 : can be realized using 2 HA. s= A XOR B S = s XOR C => A XOR B XOR C carry = AB carry = s.C => (A XOR B) .C = AB'C + A'BC f3 and f4 : Both can be realized using 3 HA. F is f3 and G is f4. Note : All can be realized using 2 Half adders also . for f3 and f4 : just consider 1st and 2nd HA , pass the carry of 1st HA as input to 2nd HA. Ref : http://www.exploreroots.com/dc41.html Brij gopal Dixit answered Apr 21, 2019 • edited Apr 21, 2019 by Brij gopal Dixit Brij gopal Dixit comment Share Follow See all 0 reply Please log in or register to add a comment.