Table 3.
Comparison of QCA full-adders in terms of gate count, area and latency
| Full adder | Type of full adder | Complexity (cells) | Area (μm2) | Latency (clock cycle) |
|---|---|---|---|---|
| FA [1] | Coplanar QCA FA (Vetteth et al. 2002) | 292 | 0.62 | 3.5 |
| FA [2] | Robust QCA FA (Kim et al. 2007) | 220 | 0.36 | 3 |
| FA [3] | Coplanar QCA FA (Wang et al. 2003) | 145 | 0.17 | 1.25 |
| FA [4] | Type-I QCA FA (Cho and Swartzlander 2007) | 135 | 0.14 | 1.25 |
| FA [5] | Multilayer QCA FA (Zhang et al. 2005) | 108 | 0.10 | 1 |
| FA [6] | The Robust QCA FA (Hänninen and Takala 2010) | 102 | 0.10 | 2 |
| FA [7] | Type-II QCA FA (Cho 2006; Azghadi et al. 2007) | 86 | 0.10 | 0.75 |
| FA [8] | Robust QCA FA (Hashemi et al. 2012) | 79 | 0.05 | 1.25 |
| FA [9] | Multilayer QCA FA (Navi et al. 2010) | 73 | 0.04 | 0.75 |
| FA [10] | Multilayer QCA FA (Qanbari and Sabbaghi-Nadooshan 2013) | 63 | 0.05 | 0.75 |
| Proposed full adder | 48 | 0.03 | 0.75 |