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question opamp with high SR and wide GBW
Hi,
I'm trying to design an two staged Op amp for a sample and hold ciruit with 125v/us slewrate and GBW>50 mhz with 60 degrees phase margin. My main problem is that i can t fullfill both gbw and phase margin requirement.
Am i doing something wrong or should i just use a different amplifier?
I posted my test circuit, internal design and my results. Any indication would be appreciated.
https://obrazki.elektroda.pl/4615456700_1369595473.png
https://obrazki.elektroda.pl/5573989800_1369595473.png
https://obrazki.elektroda.pl/7121390500_1369595474.png
Hi,
I'm trying to design an two staged Op amp for a sample and hold ciruit with 125v/us slewrate and GBW>50 mhz with 60 degrees phase margin. My main problem is that i can t fullfill both gbw and phase margin requirement.
Am i doing something wrong or should i just use a different amplifier?
I posted my test circuit, internal design and my results. Any indication would be appreciated.
https://obrazki.elektroda.pl/4615456700_1369595473.png
https://obrazki.elektroda.pl/5573989800_1369595473.png
https://obrazki.elektroda.pl/7121390500_1369595474.png
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