Implementation of Digital Circuits Using Reversible Logic

Abstract: Reversible logic has presented itself as a prominent technology which plays an imperative role in Quantum Computing. Quantum computing devices theoretically operate at ultra high speed and consume infinitesimally less power. Research done in this paper aims to utilize the idea of reversible logic to break the conventional speed-power trade-off, thereby getting a step closer to realise Quantum computing devices. To authenticate this research, various combinational and sequential circuits are implemented such as a 4-bit Ripple-carry Adder, (8- bit X 8-bit) Wallace Tree Multiplier, and the Control Unit of an 8-bit GCD processor using Reversible gates. The power and speed parameters for the circuits have been indicated, and compared with their conventional non-reversible counterparts. The comparative statistical study proves that circuits employing Reversible logic thus are faster and power efficient. The designs presented in this paper were simulated using Xilinx 9.2 software. Keywords: Reversible logic, Quantum Computing, highspeed, less power, speed-power trade-off, Ripple carry adder, Wallace tree multiplier, GCD processor, non-reversible counterparts.