Electronic Devices - Op-Amp Applications - Discussion

Discussion :: Op-Amp Applications - General Questions (Q.No.10)

10.

Calculate the input voltage if the final output is 10.08 V.

 [A]. –1.05 V [B]. 0.525 V [C]. 0.168 V [D]. 4.2 V

Explanation:

No answer description available for this question.

 Suresh Nagaraj said: (Sep 17, 2011) Vo/Vin=(1+Rf1/R1)*(-Rf2/R2)*(-Rf3/R3) 10.08/Vin=2*1*30 Vin=0.168 V

 Mallik said: (Mar 26, 2012) Keep in mind that there are two inverting and one non-inverting amplifiers.. gain of whole system is G= G1*G2*G3 G1 non-inverting G= (1+10k/5k)*(-5k/5k)*(100k/5k) Vout/Vin=60; => Vin= 0.168;

 Sonam said: (Aug 14, 2014) Vo = (1+10k/5k) * (-5k/5k) * (-100k/5k) V1. Vo = 3 * -1 * -20 V1. V1 = 10.08 / 60. V1 = 0.168.

 Asdf said: (Sep 21, 2017) Explanation is awesome, thank you @Mallik.

 Jayzeebeee said: (Feb 5, 2018) Take input as x: So the equation becomes; 10/5*x+2x*100/5=>2x+2x*20=10.08. so x=10.08/80=0.168.

 Abhilash said: (Apr 24, 2018) Good explanations. Thanks to all.