Electronic Devices - Op-Amp Applications - Discussion
Discussion Forum : Op-Amp Applications - General Questions (Q.No. 4)
4.
Determine the output voltage when V1 = –V2 = 1 V.
Discussion:
28 comments Page 1 of 3.
Vaibhav said:
6 years ago
Simple and easy the circuit shown acts as a difference amplifier and output voltage is given by vo =( v2-v1)x(Rf/R1).
(5)
Praveen said:
6 years ago
Vo = (-RF/R1)V1 + (1+(RF/R1))V2'.
= -1 + (1+1)(20*V1/40),
= -2.
= -1 + (1+1)(20*V1/40),
= -2.
(4)
Surya said:
9 years ago
It is diff amplifier Vo = (v2-v1) = (-1-1) =-2.
(3)
Shrestha said:
6 years ago
According to the differential amplifier fromula:
Vout = (R2/R1)*(V2-V1).
= (20/20)*(-1-1).
= 1*-2 = -2.
Vout = (R2/R1)*(V2-V1).
= (20/20)*(-1-1).
= 1*-2 = -2.
(2)
Avi said:
6 years ago
[R3/(R1+R3][(R2+R4)/R2][V1]-[V2 (R4/R2)] is the formula. So it is 0V.
(1)
Murad said:
1 decade ago
By using superposition principle:
Vo'=-(rf/r1)V1=-1V
Vi+= -1(20/40)=-0.5V
Vo''=(1+rf/r1)Vi+=2*(-.5)=-1
Vo=Vo'+Vo''=-1-1=-2V
So the answer should be B.
Vo'=-(rf/r1)V1=-1V
Vi+= -1(20/40)=-0.5V
Vo''=(1+rf/r1)Vi+=2*(-.5)=-1
Vo=Vo'+Vo''=-1-1=-2V
So the answer should be B.
(1)
ALI said:
8 years ago
(20/20+20)(100+100/100)*V1-(100/100)V2 = V1-V2.
The resulting output voltage is seen to be the difference of the two input voltage.
The resulting output voltage is seen to be the difference of the two input voltage.
(1)
PUNAM said:
1 decade ago
Vo = -(Rf/R1)(V1-V2).
David khasu said:
7 years ago
Here, we can use {Rf÷R1}*(v1-v2).
Rakesh said:
8 years ago
Vo=(-100/100)V1+(20/(20+20))((100+100)/100)V2.
Vo=-V1+(1/2)(2)V2.
Vo=-V1+V2,
Vo=-1+(-1) because -V2=1 => V2=-1,
Vo=-2 Volts.
Vo=-V1+(1/2)(2)V2.
Vo=-V1+V2,
Vo=-1+(-1) because -V2=1 => V2=-1,
Vo=-2 Volts.
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers