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Kim Loan Nguyen Thi

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Operational amplifiers are an integral part of many analog and mixed signal systems. As the demand for mixed mode integrated circuits increases, the design of analog circuits such as operational amplifiers in CMOS technology becomes more critical. This paper presents a two stage CMOS operational amplifier, which operates at ±1.8V power supply using TSMC 0.18um CMOS technology. The OP-AMP designed exhibit unity gain frequency of 12.6 MHz, and gain of 55.5db with 300uw power dissipation. The gain margin and phase margin of OP-AMP is 45˚ and 60˚ respectively. Design and simulation has been carried out in P Spice tool.

Design of Low Voltage Low Power CMOS OP-AMP

IJERA Editor

Alinea u ud 1945

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The boundary layer flow of incompressible electrically conducting fluid past a stretching plate in the presence of transverse magnetic field with heat transfer taking into the account the viscous dissipation effects is considered in this present study. The non-linear momentum boundary layer and heat transfer equations are converted into non-linear ordinary differential equations using similarity transformations. The resulting boundary value problem is solved numerically by an implicit finite difference scheme. The solution is found to be dependent on magnetic field parameter M, Source term S, Prandtl number Pr and Eckert number Ec . The results are shown graphically to illustrate the effects of these parameters on the fluid velocity and temperature distribution in the boundary layer.

MHD Effects And Heat Transfer On A Boundary Layer Flow Past A Stretching Plat...