Hi you guys! I'm new here
I did get in troubles with my circuit below! It's my project which my teacher gave it to me.
My purpose is to amplify difference between two inputs.Specifically, 20mV and 10mV are connected with input to get 1V at the last OpAmp's output.
The problem is when two input are grounded,the output offset voltage of OA1 and OA2 comes to saturation in reality.I attempted to find out what problem is but it's doesn't make sense..
As i figured,I used Potienmeter to adjust offset voltage because I thought the offset voltage is just 20-30 mV..In fact,it doesn't..so anyone here can explain to me the cause of this case?I will really appreciate that!
Here is my circuit on proteus..Sorry if I have dumb question,I have just learned about this component.By the way,English is not my official language so some expression is not really exact.Hope you ignore it..Thank you!
I did get in troubles with my circuit below! It's my project which my teacher gave it to me.
My purpose is to amplify difference between two inputs.Specifically, 20mV and 10mV are connected with input to get 1V at the last OpAmp's output.
The problem is when two input are grounded,the output offset voltage of OA1 and OA2 comes to saturation in reality.I attempted to find out what problem is but it's doesn't make sense..
As i figured,I used Potienmeter to adjust offset voltage because I thought the offset voltage is just 20-30 mV..In fact,it doesn't..so anyone here can explain to me the cause of this case?I will really appreciate that!
Here is my circuit on proteus..Sorry if I have dumb question,I have just learned about this component.By the way,English is not my official language so some expression is not really exact.Hope you ignore it..Thank you!