GSarris
Member level 1

- Joined
- Mar 27, 2009
- Messages
- 41
- Helped
- 0
- Reputation
- 0
- Reaction score
- 0
- Trophy points
- 1,286
- Location
- Netherlands
- Activity points
- 1,616
hello
i am trying to design an opamp for high linearity at high frequencies (100MHz) and i have used a folded cascode followed by a simple cascode at a unity gain feedback. At lower freqs the linearity is ok, but at higher frequencies it is horrible. Can you please tell me what can be possibly wrong? The schemartic, loopgain and the linearity performance are attached. Thank you in advance.
i am trying to design an opamp for high linearity at high frequencies (100MHz) and i have used a folded cascode followed by a simple cascode at a unity gain feedback. At lower freqs the linearity is ok, but at higher frequencies it is horrible. Can you please tell me what can be possibly wrong? The schemartic, loopgain and the linearity performance are attached. Thank you in advance.