Ripple Carry Adder Implementation
F1
carry
in
carry
out
sum
A
B
sum
A
B
cin
cin
cin
A
B
A
B
cout
F1
F1
F1
A1
B1
A2
B2
A3
B3
C0
C4
S1
S2
S3
F4
F1
A4
B4
S4
tpd
Delay at C4
= 4 tpd
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