Ravinder487
Full Member level 3
- Joined
- Jul 9, 2010
- Messages
- 169
- Helped
- 0
- Reputation
- 0
- Reaction score
- 0
- Trophy points
- 1,296
- Location
- Bangalore, India
- Activity points
- 2,469
Hi all,
I've designed preamp with CMFB(schematic attached).Its taking 20nS to get settle.I need to insert this preamp in a ADC working at 500MSPS.unity gain BW of preamp is 835MHz and gain is around 26V/V.Preamp is biased at 45uA.
Does the settling of this preamp is limited by BW or slewrate?How can I increase its speed?
In general, what(settling time or bandwidth) will limit settling time of any amplifier?Is there any rule of thumb relating these parameters?
![](https://obrazki.elektroda.pl/68_1304314559_thumb.png)
I've designed preamp with CMFB(schematic attached).Its taking 20nS to get settle.I need to insert this preamp in a ADC working at 500MSPS.unity gain BW of preamp is 835MHz and gain is around 26V/V.Preamp is biased at 45uA.
Does the settling of this preamp is limited by BW or slewrate?How can I increase its speed?
In general, what(settling time or bandwidth) will limit settling time of any amplifier?Is there any rule of thumb relating these parameters?
![](https://obrazki.elektroda.pl/68_1304314559_thumb.png)