How to make simple opamp gain stage?

[bancika]

Can someone help me make simple opamp gain stage with TL072 using bipolar +-15V supply
I need it to recover gain in amp FX loop
Tnx

[Seljer]

http://en.wikipedia.org/wiki/Operational_amplifier_applications#Non-inverting_amplifier
connect the VCC+ to +15V, VCC- to -15
not sure on how neccesary are coupling capacitors
set the R1 and R2 ratio to whatever you need for the gain (or use a pot for one of them to get it adjustable)

[bancika]

Thanks, that should be good enough

[petemoore]

  Microamp

[bancika]

what does cap in opamp loop do?

[Dragonfly]

what does cap in opamp loop do?

many circuits use a small (<200pF) cap to "tame" some of the high end a bit.


AC

[Ge_Whiz]

many circuits use a small (<200pF) cap to "tame" some of the high end a bit.

In particular, to prevent unwanted oscillation and / or RF pickup.