Reversible Logic Based Design and Test of Field Coupled Nanocomputing Circuits - Field-Coupled Nanocomputing: Paradigms, Progress, and Perspectives - page 161

9 Design Methodology for Non-reversible Testable
Design Based on MX-cqca Gate

The proposed conservative logic gate 'MX-cqca' is useful in designing any major-
ity logic and multiplexer logic based testable non-reversible circuits. In the
existing literature 13 standard functions are proposed to represent all three-
variable Boolean functions [ 77 ]. These thirteen functions are widely used in

Table 4. A comparison of Fredkin and MX-cqca gates

Fredkin MX-cqca Improvement %

Mx-cqca to
Fredkin

Majority
voters

6 5 17

Inverters 2 1 50

Clk zones 4 4 -

Total cells 246 218 11.3

Area (L × W) 0 . 4812 µ m × 0 . 7698 µ m
=0 . 37 µ m 2

0 . 479 µ m × 0 . 721 µ m
=0 . 35 µ m 2

5.4

Fig. 24. Modeling of MX-qca gate QCA layout