How to get non-inverting output with gain=10? (opamp)

[wakaka]

Hi all, I would like an non-inverting output with gain=10. HOw can i do that?
as the non inverting gain = 1+(Rf / Ri). How to get rid of the extra 1??

Is there anything like unity gain inverting opamp??Meaning after getting the inverting output with gain=10, and pass it thru the unity inverting gain opamp again to get my +ve voltage, is it possible??
Or is there any way to amplify a 0.25V to 2.5V?

 

[Giuss]

741 opamp

You can have gain 10 if Rf/Ri = 9 so for example use Rf = 90Kohm and Ri = 10 Kohm

Unity gain inverting amp is simple, you need only 2 resistor with the same value, because the gain of inverting amp is -(Rf/ri)

 

[amriths04]

Re: 741 opamp

the best and the easiest way would be to use r2=9*r1 in a non-inverting stage.
i dont think there will be any problem in using r2=9k(5.6k+3.3k) and r1=1k.

regards,
amrith.s