PPT
Lecture 2 Adders. Half adder. Full Adder. si is the modulo-2 sum of ci, xi, yi. An n-bit Ripple Adder. Yn-1. Xn-1. Y0. X0. ………. Cn. FA. Cn-1. C1. FA. C0. Sn-1. S0. MSB. LSB. y. y. y. Adder/subtractor. n. –. 1. 1. 0. ¤. Add. Sub. control. x. x. x. n. –. 1. 1.