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Non-inverting Amplifiers

Non inverting amplifier :

in the non inverting amplifers circuit , the negative inout (-) is connected to the Ground. and the input  Vg   is conected to the + (positive input) and thus it is obtained the same  phase between  input signal and the output signal.






 


since input empedence is too low we can say that lin = 0;
and then


and   no  current flows in the inputs , and we can take Vı =Vg 


op-amp_NON_inverting_formula3.jpg

-Vg.Rf=R1.(Vo-Vg) + Vg.Rf = 0 =>R1.Vo-R1.Vg+Vg.Rf=0

and then

op-amp_NON_inverting_formula4.jpg




Keywords : Opamp, Op-amp, Amplifier, No-inverting, Amplificator, Amplification
Writer : delon  |
13 Mar 2006 Mon   
|  7.794 Views
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