0 votes 0 votes Consider the following circuit: It outputs x+y It outputs y-x It outputs x+1 It outputs y+1 Digital Logic digital-logic parallel-adder combinational-circuit + – Sambhrant Maurya asked Jan 4, 2019 Sambhrant Maurya 502 views answer comment Share Follow See all 5 Comments See all 5 5 Comments reply Show 2 previous comments Abhisek Tiwari 4 commented Jan 4, 2019 reply Follow Share y-x 0 votes 0 votes Sambhrant Maurya commented Jan 4, 2019 reply Follow Share @Devwritt @Abhisek Tiwari 4 Please explain your solutions. 0 votes 0 votes Abhisek Tiwari 4 commented Jan 4, 2019 reply Follow Share A xor 1=A' so Y==>one's complement of Y i.e -Y thus X-Y 0 votes 0 votes Please log in or register to add a comment.
0 votes 0 votes See, given is 4 bit adder, And, X⊕1= ~X // 1⊕1=0 or 0⊕1=1 So, X3X2X1X0 ⊕ operation with 1 will give 1's complement of it. And as we know , 2's complement = 1's complement +1 // here, Gn =1 So, Here, Y-X= Y+(2's complement of X) Option B Devwritt answered Jan 4, 2019 Devwritt comment Share Follow See 1 comment See all 1 1 comment reply Sambhrant Maurya commented Jan 4, 2019 reply Follow Share What is the significance of Gn=1 here? 0 votes 0 votes Please log in or register to add a comment.