design of novel 2:4 decoder circuits for quantum-dot cellular automata technology

Quantum-dot cellular automata (qca) technology is a highly promising emerging technology that serves as a viable alternative to cmos technology. on the other hand, the decoder is one of the vital building blocks in digital circuits. this paper presents and evaluates two novel 2:4 decoder circuits in qca technology. the 2:4 decoder is a crucial component in digital systems, responsible for translating binary information from encoded input signals to a unique output signal. the first proposed circuit is implemented in a single layer, and the second proposed circuit is implemented in 3 layers. the functionality of the proposed decoder circuits is verified using the qcadesigner tool. the obtained results demonstrate that the designed coplanar qca decoder has 34 cells, 0.02 , and 0.5 clock cycles delay. in addition, our proposed multilayer decoder has 34 cells, 0.01  area, and 0.5 clock cycle delay. the coplanar and multilayer developed decoder circuits have 2.08  and 2.33 , average ebath energy, respectively. the comparison results indicate that the proposed circuits have advantages compared to other decoder circuits.