Integrator

fadY

New Member

• Mar 13, 2003

• #1

Hi
I'm doing a project in audio and I'd like to find a circuit that could integrate a signal with having a constant gain on the audio band of frequencies.
I already have an op amp integrator but this one has a decreased gain with increasing frequency.


ThanX

fadY

 

Phasor

Member

• Mar 13, 2003

• #2

Just out of curiosity, could you post the schematic of the one you do have, so we know what NOT to suggest??? :wink:

 

fadY

New Member

• Mar 13, 2003

• #3

It is the simplest op amp integrator with a resistor in parallel with the capacity to deal with DC.

Is this the best circuit?

 

kinjalgp

Active Member

• Mar 13, 2003

• #4

Decrease in gain at high frequencies can be cause by:
1) Wrong selection of R & C - Integration Time selecting components
2) Low speed op-amp is used

Design your integrator properly for desired cut-off frequencies and you won't face this problem. Use high speed op-amps for high frequency operation.

 

fadY

New Member

• Mar 14, 2003

• #5

I'm gonna check that! The opamp I use is the OPA2134 isn't it fast enough for audio frequencies?
thanks a lot for your help