I need help designing an amplifier in orcad/pspice

Thread Starter

yarn7

Joined Nov 7, 2020
4
Hi everyone im on my 3rd year of university and i have a project to design an amplifier that amplifies the vin 100 times in orcad and i cant figure out how to make it amplify i'll post some screenshots of my simulations and design maybe someone can help


1604761925306.png

this is my design

1604761980381.png
this is my time domain simulatuin, red is the output, green the input

1604762034284.png


this is my ac sweep simulation
 

Ian0

Joined Aug 7, 2020
1,922
C21 is unnecessary as well. It's just in parallel with R64 and is probably responsible for the treble roll-off.
Not sure what good the MOSFET current mirror is doing either.
 

Thread Starter

yarn7

Joined Nov 7, 2020
4
C21 is unnecessary as well. It's just in parallel with R64 and is probably responsible for the treble roll-off.
Not sure what good the MOSFET current mirror is doing either.
thank you, the mosfet current mirror was a requirement in the project
 
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