Electronic Devices - Op-Amp Applications - Discussion

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


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

Vo = V1

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

Answer: Option D


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.

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