Electronic Devices - Basic Op-Amp Circuits - Discussion
Discussion Forum : Basic Op-Amp Circuits - General Questions (Q.No. 21)
21.
Refer to the given figure. What is the output voltage?
Discussion:
5 comments Page 1 of 1.
Mahendra said:
6 years ago
Gain = -Rf/Ri so gain is (-1).
So v1o = G*v1 = -1*-1 = 1v.
v2o = g*v2 = -1*1.5 = -1.5v.
So vout= v1o+v2o = 1-1.5 = -0.5.
This is the answer.
So v1o = G*v1 = -1*-1 = 1v.
v2o = g*v2 = -1*1.5 = -1.5v.
So vout= v1o+v2o = 1-1.5 = -0.5.
This is the answer.
Guru said:
8 years ago
Thank you @Suma.
Suma said:
8 years ago
-vout=rf/ri(v1+v2)
gain=-rf/ri.
A1=-5/5=-1
A2=-5/5=-1
-vout=(-1*1)+(-1*1.5)
-vout=1-1.5
vout=-0.5V.
gain=-rf/ri.
A1=-5/5=-1
A2=-5/5=-1
-vout=(-1*1)+(-1*1.5)
-vout=1-1.5
vout=-0.5V.
Neeraj said:
8 years ago
Sir, can you explain this in step by step?
(1)
Ragavi said:
1 decade ago
Its a summing amplifier... formulae is vo=-rf/ri{v1+v2+v3}=-.5v
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