Electronic Devices - Op-Amp Applications - Discussion
Discussion Forum : Op-Amp Applications - General Questions (Q.No. 6)
6.
Calculate the output voltage if V1 = V2 = 0.15 V.
Discussion:
9 comments Page 1 of 1.
Shudi said:
4 years ago
What if v1 and v2 are in AC? Please explain.
Amit said:
8 years ago
Vout=. --- {(v1/r1+v2/r2)} / (1/rf).
Gives -6.45 volt.
Above formula is for inverting op amp.
Gives -6.45 volt.
Above formula is for inverting op amp.
(1)
Vijay said:
9 years ago
That is the saturation voltage.
Mulata said:
9 years ago
Yes, but what about +9 V and -9 V?
(1)
Madhu adkar said:
10 years ago
Since non inverting terminal is grounded Vb=0V.
Subrat said:
1 decade ago
Vb is the voltage at non inverting terminal (-ve).
Rajasekhar said:
1 decade ago
What is vb? and how can you solve the problem?
Mallik said:
1 decade ago
Ok just. If you find it difficult to remember formula .. here is the way...
rules
1)both the terminals of Op-amp are always at same voltage levels,
2)current entering into Op-amp is always '0'.
now write equation
[(V1-Vb)/33k]+[(V2-Vb)/10k]+[(Vo-vb)/330k] = 0;
from KCL
(10*V1)+(33*V2)+Vo=0
=> Vo= -(43*0.15)
V0= -6.45
rules
1)both the terminals of Op-amp are always at same voltage levels,
2)current entering into Op-amp is always '0'.
now write equation
[(V1-Vb)/33k]+[(V2-Vb)/10k]+[(Vo-vb)/330k] = 0;
from KCL
(10*V1)+(33*V2)+Vo=0
=> Vo= -(43*0.15)
V0= -6.45
(1)
Chandan natkar said:
1 decade ago
It is inveting summer
Vo=(-Rf/R1)V1+(-Rf/R2)V2
=(-330/33)0.15+(-330/10)0.15
=-1.5-4.95
=-6.45
Vo=(-Rf/R1)V1+(-Rf/R2)V2
=(-330/33)0.15+(-330/10)0.15
=-1.5-4.95
=-6.45
(2)
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