output of amplifier when it is connected to peak detector

[matin-kh]

Hello,

I have an amplifier which its output is shown below:


I use a peak detector to detect the amplitude of the output of amplifier which its circuit is like this:


I have a problem when I connect the output of amplifier to the peak detector the output of amplifier would be like this:


as you see the amplitude of out- is higher than out+ and it damage the output of peak detector i can't understand the reason with sin source the power detector don't act like this and every thing is ok, do you know what is the problem?

 

[FvM]

There's obviously a circuit asymmetry that can't be seen on your schematics. You better show the complete circuit.

 

[matin-kh]

the peak detector is shown below, don't pay attention to ref.level shifter:


and my amplifier is 3 stage of the circuit below:


thanks a lot

 

[FvM]

O.K. No reason for asymmetry in the schematic. May be crosstalk or asymmetrical load.

 

[matin-kh]

so how can i fix it?

 

[BradtheRad]

Your schematic uses what look like current sources. A current source will generate any voltage necessary to push its specified ampere value.

It will even generate a very high voltage. Could that be the cause of your odd readings?