output of amplifier when it is connected to peak detector

Status
Not open for further replies.
M

matin-kh

Member level 3
Joined
Nov 9, 2013
Messages
67
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,286
Location
iran
Activity points
1,955
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?
 

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

O.K. No reason for asymmetry in the schematic. May be crosstalk or asymmetrical load.
 
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?
 
Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…