Electronics and Communication Engineering - Analog Electronics - Discussion

16. 

The output V0 in figure is

[A]. -100 V
[B]. -100 mV
[C]. 10 V
[D]. 10 mV

Answer: Option B

Explanation:

Input to non-inverting op-amp is -10 x 10-6 x 103 = -10 mV.

Therefore output = = -100 mV.


Mianl said: (Oct 4, 2014)  
What about first inverting amplifier?

Manjappa Hosakeri said: (Jan 9, 2015)  
First inverting amplifier is op-amp is -10 x 10-6 x 103 = -10 mV.

Mukesh said: (Feb 8, 2015)  
Please tell 2nd step how -100mv will come?

Bindu said: (Mar 18, 2015)  
What is the formulae used for to get output voltage?

Vim said: (May 26, 2015)  
Anyone can please explain the solution?

Roopak said: (Jun 19, 2015)  
vo = vin(1+R1/R2) where vin = -10mv, R1 = 90, R2 = 10.

Ritesh Maurya said: (Jun 20, 2015)  
Second stage is nothing it just out put of non inverting opamp.

Vout = (1+rf/r1)*Vinput.

Vout = (1+90/10)*-10.

Jyothi R said: (Oct 4, 2016)  
Let first op amp output is v01;

By using KCL ((0 - v01)/(1k)) = (10 micro amps);
v01 = -10mV;
v01 is the input to the second op amp that to non inverting.

If we give non-inverting input, here output will be (1 + (R2/R1)v01;
So, v0 = (1 + (90/10))(-10mV) = -100mV.

Mukund said: (Jun 1, 2017)  
I think the answer is option A.

Vishakadatta said: (Jul 23, 2017)  
@Mukund.

There is milli(m), so its 100mV.

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