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In this paper, we propose four 4:2 compressors, which have the flexibility of switching between the exact and approximate operating modes. In the approximate mode, these dual-quality compressors provide higher speeds and lower power consumptions at the cost of lower accuracy. Each of these compressors has its own level of accuracy in the approximate mode as well as different delays and power dissipations...
The extensive improvement in the VLSI technology results in optimization of various factors, at the same time causing overhead in area, delay etc. Multipliers being the integral part of major application systems like Digital Signal Processor (DSP), Microprocessor and Application Specific Integrated Circuits (ASIC'S) plays a major role in the overall area, power consumption and performance of the processor...
In recent trend, power management has become critical concern due to portable applications. High power dissipation increases temperature profile of the chip and affects the performance of the design. Many techniques at different levels of design process have been recommended to reduce the power dissipation. Multiplier is one of the major sources of power dissipation in application systems like Digital...
This paper describes high speed compressors for high speed parallel addition multipliers like Booth Multiplier, Wallace Tree Multiplier in Digital Signal Processing (DSP). We proposed 4-3, 5-3, 6-3 and 7-3 compressors for high speed multiplication. The compressors reduce vertical critical path more rapidly than conventional compressors. A 5-3 conventional compressor can take four steps to reduce bits...
Carry on the theoretical calculations and experimental analysis of R22, R417and R134a applied to air source heat pump water heaters. Kept 5 degrees superheat at the outlet of evaporator, tested the heating capacity, power, COP, hot water production, the exhaust temperature and pressure of the compressor under different season conditions and 55??C and 60??C outlet water temperature of the tube heat...
Nowadays, the Proton Exchange Membrane Fuel Cell (PEMFC) is considered as one of the most promising sources of energy with zero emissions. Therefore, maintaining the PEMFC system in its optimal operating conditions is one of the most important research orientations in the domain. In fact, the system's efficiency depends highly on the electric power generated, the amount of hydrogen used and the power...
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