Electronic Devices - Op-Amp Applications - Discussion
Discussion Forum : Op-Amp Applications - General Questions (Q.No. 11)
11.
Calculate the output of the first-stage op-amp when V1 = 25 mV.
Discussion:
12 comments Page 1 of 2.
Isuru deshapriya said:
3 years ago
V input = 60 * v output.
v output = 60 * 25mV,
v output = 1.5V.
v output = 60 * 25mV,
v output = 1.5V.
Himanshu kumar said:
4 years ago
Since first circuit work as a non_inverting op_amp therefore v(out) = 25[1+10/5] = 75mv,
And other circuit work as a inverting op_amp so v(out) = -5/5*75 = -75mv=0.075v(answer.
And other circuit work as a inverting op_amp so v(out) = -5/5*75 = -75mv=0.075v(answer.
Abhay mishra said:
5 years ago
V01=[1+Rf/R1]*v1
[1+10000/5000]*25mv.
Then,
[1+2]=3 * 25=75.
So answer is 0.075V.
[1+10000/5000]*25mv.
Then,
[1+2]=3 * 25=75.
So answer is 0.075V.
(1)
Gokul said:
6 years ago
Thanks @Biswajit Panda.
Turki said:
6 years ago
The answer is 1.5v.
Maharlikan said:
7 years ago
It should be 1.5 v.
Surya said:
9 years ago
The final stage output is 1.5v.
Vino said:
1 decade ago
Two inverting and one non inverting circuit is present .calculate the gain separately and then multiply the inverting and non inverting gain you get v0=1.5v.
i.e v0=v1(1+(Rf/R1)*-(Rf/R1)*-(Rf/R1)).
25/1000((1+10/5)*-(5/5)*-(100/5) = 1.5v.
i.e v0=v1(1+(Rf/R1)*-(Rf/R1)*-(Rf/R1)).
25/1000((1+10/5)*-(5/5)*-(100/5) = 1.5v.
Rathi said:
1 decade ago
@Bikram and @Bharathy Punk.
Read carefully the question one more.
They asking first stage output only.
So @Biswajit Panda explanation is right one.
Read carefully the question one more.
They asking first stage output only.
So @Biswajit Panda explanation is right one.
Bharathy Punk said:
1 decade ago
Vo/Vin=(1+Rf/R1)*(-Rf2/R2)*(-Rf3/R3).
Vo/Vin = (1+10/5)*(-5/5)*(-100/5).
Vo = {3*(-1)*(-20)}*25*10^-3.
Vo = 60*0.025 = 1.5v.
Vo/Vin = (1+10/5)*(-5/5)*(-100/5).
Vo = {3*(-1)*(-20)}*25*10^-3.
Vo = 60*0.025 = 1.5v.
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