Table 4: Comparison of recent ripple carry adder (RCA).

Design Cell count Area Clock cycle

4-bit
 In [17], type I 558 0.85 1.25
 In [17], type II 308 0.29 2
 Proposed here 153 0.11 1
8-bit
 In [17], type I 1528 2.93 9
 In [17], type II 695 0.79 3
 Proposed here 466 0.77 2.25