Abstract: Reversible logic is playing an important role in research areas and has found its applications in low power CMOS VLSI, Nanotechnology and Quantum computation. Recently, several researchers have focused their efforts on the design and synthesis of efficient reversible logic circuits. LFSR’s are attractive structures in the area of digital system testing and fault tolerant computing. In this work, we present designs of reversible LFSR using D flip flops with asynchronous set/reset. The comparison of proposed design is done in terms of the quantum cost, delay and garbage out puts. The important reversible gates used for Reversible logic design are Feynman gate, Fredkin gate, Toffoli gate, SAM gate etc.

Keywords: Low-power VLSI, Low-power CMOS design, reversible logic, LFSR.