Research Article
An Efficient Design of DCT Approximation Based on Quantum Dot Cellular Automata (QCA) Technology
Table 1
Comparison of the proposed adder with the previous works.
| Circuit | Cell count | Area (μm2) | Clock no. cycle | Crossover type |
| Full adder [43] | 135 | 0.14 | 1.25 | Multilayer | Full adder [44] | 93 | 0.087 | 1 | Multilayer | Full adder [45] | 73 | 0.080 | 0.75 | Multilayer | Full adder [46] | 220 | 0.36 | 3 | Coplanar | Full adder [53] | 206 | 0.28 | 2 | Not required | Full adder [47] | 102 | 0.097 | 2 | Coplanar | Full adder [43] | 59 | 0.043 | 1 | Coplanar (clocking based) | Full adder [49] | 49 | 0.04 | 1 | Coplanar (clocking based) | Proposed adder | 45 | 0.04 | 0.5 | Coplanar |
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