# Electronic Devices - Op-Amp Applications - Discussion

Discussion Forum : Op-Amp Applications - General Questions (Q.No. 5)
5.
How many op-amps are required to implement this equation?

Vo = V1

2
3
4
1
Explanation:
No answer description is available. Let's discuss.
Discussion:
10 comments Page 1 of 1.

Pratigna said:   5 years ago
In voltage follower, an input is equal to output. So voltage follower required single op-amp.

Prashant Tyagi said:   7 years ago
Here we use the concept voltage follower completely?

Surya said:   7 years ago
It is a buffer. Because the output follows the input voltage. (it's also called voltage follower).

Arya Mohan said:   7 years ago
When vi = vo, it is a voltage follower with Beta = 1 (unity gain).
(1)

BHARAT NIMESH said:   8 years ago
Only one op-amp is required.

Subrahmanyam said:   9 years ago
gain is 1 so that Av=Vo/Vin =1 so Vout=Vin

Praveen Tiwari said:   1 decade ago
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 ;.

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 .