Reversible logic is emerging as a promising computing paradigm, having its applications in low-power CMOS, quantum computing, nanotechnology and optical computing. Firstly, we showed a modified design of conventional BCD subtractors and also proposed designs of carry look-ahead and carry skip BCD subtractors. The proposed designs of carry look-ahead and carry skip BCD subtractors are based on t...

Addition is the most basic arithmetic operation and adder is the most fundamental arithmetic component of the processor. Two important attributes of all digital circuits, for most applications are maximizing speed and minimizing power consumption. The speed of different modules used in the design will dominate the overall performance of the system. Depending on the delay and power consumption r...

VLSI Integer adders find applications in Arithmetic and Logic Units (ALUs), microprocessors and memory addressing units. Speed of the adder often decides the minimum clock cycle time in a microprocessor. The need for a Parallel Prefix Adder (PPA) is that it is primarily fast when compared with a ripple carry adder. PPA is a family of adders derived from the commonly known carry look ahead adder...

Leakage power accounts for an increasingly larger portion of total power consumption in deep submicron technologies. Active leakage control method reduces leakage power by dynamically disconnecting supply to inactive blocks and adjusting body bias to further limit leakage and maintain performance. The active leakage control scheme is advantageous for blocks with low activity factors and relativ...

Parallel Prefix Adders have been established as the most efficient circuits for binary addition. The binary adder is the critical element in most digital circuit designs including digital signal processors and microprocessor data path units. The final carry is generated ahead to the generation of the sum which leads extensive research focused on reduction in circuit complexity and power consump...

ln this paper, the efficiency of a fully adiabatic logic circuit is compared with its combinational and pipelined static CMOS counterparts. The performance of each circuit is studied in terms of the maximum frequency of operation, the minimum voltage of operation, the circuit energy consumption, and the switching noise generated by the circuit. An 8-bit carry look-ahead adder is designed using ...

This paper analyzes the usefulness of approximate addition for digital image compression. Discrete Cosine Transform (DCT) is an important operation in We used accurate and individually while calculating DCT to perform Accurate was performed using adder different adders individually. The were implemented application specific integrated circuit (ASIC)-type design environment a 32–28 nm complement...