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Integrator

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fadY

New Member
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
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
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
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
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
 
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