princerock
Junior Member level 2
Hello,
I'm designing a 2 stage diff op amp (folded cascode plus common source) and now I want to add cmfb to it. However I have the following quesitons before doing the design.
1. I have to add cmfb network for both stages, i.e. I need two cmfb networks, is this right?
2. DT vs. CT. Is implementation by sc circuit easier than its CT counterpart?
3. If I use sc to implement, how can I do simulation in cadence ic? It is said that I can use ideal circuits, what does this mean?
4. Can I add the cmfb without influencing the origianl op amp in terms of dc gain, GBW and phase margin?
Thank you for your help!
I'm designing a 2 stage diff op amp (folded cascode plus common source) and now I want to add cmfb to it. However I have the following quesitons before doing the design.
1. I have to add cmfb network for both stages, i.e. I need two cmfb networks, is this right?
2. DT vs. CT. Is implementation by sc circuit easier than its CT counterpart?
3. If I use sc to implement, how can I do simulation in cadence ic? It is said that I can use ideal circuits, what does this mean?
4. Can I add the cmfb without influencing the origianl op amp in terms of dc gain, GBW and phase margin?
Thank you for your help!