# Electronic Devices - Op-Amp Applications - Discussion

### Discussion :: Op-Amp Applications - General Questions (Q.No.5)

5.

How many op-amps are required to implement this equation?

Vo = V1

 [A]. 2 [B]. 3 [C]. 4 [D]. 1

Explanation:

No answer description available for this question.

 Sachin Agrawal said: (Nov 29, 2010) For the buffer amplifier opamp output voltage is same as input voltage. Hence one opamp is required for amplification.

 Saumil said: (Feb 9, 2011) It is called voltage follower op-amp.

 Mallik said: (Mar 26, 2012) In op-amp Vout = Vin * gain ; so if a gain of op-amp is 1 then Vout = Vin ; this condition of an Op-amp is called Voltage follower .

 Praveen Tiwari said: (Mar 29, 2012) Use non inverting op-amp with output terminal shorted to inverting input of op-amp it behaves as unity gain amplifier i.e., vo = vi ;.

 Subrahmanyam said: (Oct 2, 2014) gain is 1 so that Av=Vo/Vin =1 so Vout=Vin

 Bharat Nimesh said: (Dec 18, 2015) Only one op-amp is required.

 Arya Mohan said: (Jun 28, 2016) When vi = vo, it is a voltage follower with Beta = 1 (unity gain).

 Surya said: (Feb 28, 2017) It is a buffer. Because the output follows the input voltage. (it's also called voltage follower).

 Prashant Tyagi said: (Apr 21, 2017) Here we use the concept voltage follower completely?

 Pratigna said: (Mar 28, 2019) In voltage follower, an input is equal to output. So voltage follower required single op-amp.