Chapter 38 An Approach for Designing an Optimized Reversible Parallel Multiplier by Reversible Gates

摘要

In today's electrical or electronic designing, power dissipation becomes dominant. The promising alternative to these technologies is the reversible computing. Because for irreversible circuits, information is lost and it dissipates energy as heat. The dissipated energy is proportional to the number of bits lost during computation. In case of reversible circuits, they do not dissipate energy in a large amount as irreversible circuits. So information is not lost in reversible circuits during the execution of operation. Thus generation of unique outputs from the particular inputs and reconstruction of inputs from the particular outputs can be achievable. So in the view point of designing issues, reversible logic is a promising field of research that finds applications in low power computing, quantum computing, optical computing and other emerging computing technologies, bioinfor-matics and nanotechnology-based systems. Here, an approach for the designing of optimized reversible parallel multiplier (ORPM) by reversible gates has been followed. In this regard, this paper represents a new partial reversible gate RPPG for partial product generation for the designing of ORPM. Also, two designing methods are proposed to design ORPM and a comparison is also made between these two methods and the existing reversible multiplier circuits reported in the literature in perspective of the number of reversible gates, constant input, garbage output and total logical calculation.