electronics_sky
Member level 3
![Member level 3](/styles/images/ranks/dlevel3.gif)
Hi there,
I have done an amplifier design by using folded-cascode configuration. I found that the supply voltage for folded cascode is about 0.6V, however when the same amplifier by using cascode configuration need 1.8V supply voltage.
Can anyone talk about
1. why folded cascode need MUCH LOWER supply voltage that cascode configuration?
2. What is the minimum supply voltage for a folded cascode and cascode configuration? how to calculate the minimum voltage?
3. Are there any advantages of choosing NMOS-PMOS or PMOS-NMOS configuration of folded cascode?
4. Does PMOS contribute less noise or any else advantage to put at second stage?
Thank you
blue
I have done an amplifier design by using folded-cascode configuration. I found that the supply voltage for folded cascode is about 0.6V, however when the same amplifier by using cascode configuration need 1.8V supply voltage.
Can anyone talk about
1. why folded cascode need MUCH LOWER supply voltage that cascode configuration?
2. What is the minimum supply voltage for a folded cascode and cascode configuration? how to calculate the minimum voltage?
3. Are there any advantages of choosing NMOS-PMOS or PMOS-NMOS configuration of folded cascode?
4. Does PMOS contribute less noise or any else advantage to put at second stage?
Thank you
blue