# opamp design

Discussion in 'General Electronics Chat' started by CHIDANND, Nov 25, 2015.

1. ### CHIDANND Thread Starter New Member

Nov 25, 2015
1
0
Hi sir,
Actually i need the clarification that
1)Is it possible to design a opam which gives output of 2.5v w/o any input
2)with input 5V it should provide the output as 2.75V
Hoping for your favorable response..
Thanking you sir,

Regards:
Chidanand M
(email address removed by moderator)

Last edited by a moderator: Nov 25, 2015
2. ### DickCappels Moderator

Aug 21, 2008
2,749
665
Is what you are asking for a circuit using a opamp? If so, the answer is "yes".

3. ### Bordodynov Active Member

May 20, 2015
669
194
See

DickCappels and ErnieM like this.
4. ### MikeML AAC Fanatic!

Oct 2, 2009
5,450
1,066
Do you want the output to go from 2.5V to 2.75V as the input goes from 0V (or floating) to 5V?
Or does @Bordodynov 's solution get at the problem?

If so, the required gain is (2.75-2.5)/(5-0) = 0.05
the required offset is (2.5-0) = 2.5V?

This can be done with just a power supply and a resistive network; no opamp required.