This paper presents enhancement in the speed performance of Conventional Wallace tree multiplier by reducing the partial products. Wallace tree multiplier is fabricated using 90nm CMOS technology. In this particular work, we have used 3:2 compressor, 4:2 compressor, 5:2 compressor and carry propagate adder (CPA) to reduce the partial products of conventional Wallace tree multiplier and in compr...

Encryption and decryption in RSA are done by modular exponentiation which is achieved by repeated modular multiplication. Hence efficiency of modular multiplication directly determines the efficiency of RSA cryptosystem. This paper designs a Modified Montgomery Modular Multiplication in which addition of operands is computed by 4:2 compressor. The basic logic operations in addition are partitio...

From the COP （Coefficient of Performance） equation, there are two ways to improve cooling efficiency cryocoolers: （1） increasing capacity, and （2） decreasing electrical input power. In recent years, we have focused on possibility method for a 4 K-GM （Gifford-McMahon） cryocooler. this paper, 7 kW class compressor, which is commonly connected cold head, was replaced with low power consumption （2 cl...

A stage-by-stage wet-compression theory and algorithm have been developed for overspray and interstage fogging in the compressor. This theory and algorithm are used to calculate the performance of an 8-stage compressor under both dry and wet compressions. A 2D compressor airfoil geometry and stage setting at the mean radius are employed. Six different cases with and without overspray have been ...

the aim of this study is designing the impeller of a centrifugal compressor in order to supply pressure ratio for a 65 kw micro gas turbine. first, the primary thermodynamic analysis has been conducted for the considered cycle using a home made code. herein, the compressor pressure ratio was considered to be 4. the obtained thermal efficiency was 25.64%. then, the design of micro compressor in ...

Hermetic reciprocating compressor with elliptical shell radiates noise whose frequency spectrum has a peak level at about 200 Hz and about 300 Hz. The 200 Hz and 300 Hz noise is mainly radiated from the top and the side of the compressor shell, respectively. For clarifying the noise radiation mechanism, experimental and theoretical analyses were performed. A noise source simulation test was set...

Improvement of compressor efficiency using the alternative refrigerant is demanded strongly to reduce CO2 emission, which causes the global warming. Especially the compressor using in frozen temperature level has long lifetime, and the correspondence to above-mentioned is one of the most important subjects. The scroll compressor is the promising structure to solve this problem. A technical poin...

For high speed applications, a huge number of adders or compressors are to be used in multiplications to perform the partial product addition. In this paper a new approach of reducing power for a given system is developed that is adiabatic logic. The Array multiplier, Vedic 4x4 multiplier and 8x8 multiplier are designed using energy recovery logic in the inverter. The number of adders is reduce...