yefj
Advanced Member level 5
- Joined
- Sep 12, 2019
- Messages
- 1,555
- Helped
- 1
- Reputation
- 2
- Reaction score
- 5
- Trophy points
- 38
- Activity points
- 9,364
Hello,Mgnd is a NMOS .during the proccesing stepI need to keep Vgs<Vt to keep the charge.
The SAR is 7 bit with a certain capacitance.The general formula for V+ (Source of the mosfet) is shown bellow.
I need to peak the minimal Vg needed for the most problematice source (V+).
Our V+ could be a negative voltage thus source could turn on ,and source will be the right side as shown bellow.
Vin=1V for the formula and Vref=1
Using the formula bellow what is the most problematic V+ ? and why?
Thanks.
The SAR is 7 bit with a certain capacitance.The general formula for V+ (Source of the mosfet) is shown bellow.
I need to peak the minimal Vg needed for the most problematice source (V+).
Our V+ could be a negative voltage thus source could turn on ,and source will be the right side as shown bellow.
Vin=1V for the formula and Vref=1
Using the formula bellow what is the most problematic V+ ? and why?
Thanks.
