reduce noise in Amplifier Stage

[OvErFlO]

I have this configuration, I have see a little output noise (Vpp_noise = 100mV) on the first AOP.
(see image below)

**broken link removed**

The second amplify is a AOP inverted mode with an Vo = -10* Vi, my second amplify bounce also noise, there's a metod to reduce noise ?

thanks

 

[jayc]

What if you try using an ideal Op-Amp?

 

[eecs4ever]

100 mV is pretty large. Maybe using ideal op-amps could isolate where the noise is coming from?

Try adding some capacitance at that node to see that helps.

 

[jcpu]

Dear OvErFlO:

Please tell the start and stop frequency.
But 100mV is really large.

You might want to check correctness of the noise model
by simulating stand alone transistor.