Carry Bypass Adder
a0
b0
a1
b1
a2
b2
c0
c4/0
S0
S1
S2/0
a3
b3
S3/0
a2
b2
c4/1
S2/1
a3
b3
S3/1
c2=0
c2=1
0
1
c2
c4
+
+
+
+
+
+
Delay of + is tpd
Delay of mux is tm
Delay at c4 is 2 tpd + tm
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