Pipeline ADC Gain stage

[suhas_shiv]

Hi All,
I am designing the gain stage for the pipeline ADC. I need a gain of 2 using series cap and feedback cap. Won't the series cap block the DC voltage from voltage source needed to bias the input transistors of the opamp? So how do I bias the opamp then?

Thanks

 

[careking]

you can refer Abo's paper!

 

[jonashat]

During sampling, you're supposed to pull the Opamp input terminals to an AC ground (which is your input common mode DC value).

 

[mists]

you should learn the switch capacitor circuit principle firstly, i think chapter 9 in allen's book is a good startpoint.