buffer between downconverted signal to the ADC

Dear all,

I have a question about buffer design. I hope anyone could help me. I need to have some information about buffer circuit design between down-converted signal (maybe from the AGC output) and ADC input. Since my front-end part uses 1.8V supply voltage and baseband part uses 3.3V. Therefore, I don't know what kind of buffer stage is needed. Could anyone suggest some materials to me for studying?

Thanks

wccheng

it depends on a lot of things. for example, NF requirement, input/output resistance, power, linearity, output voltage swing. you need make those things clear, then to find papers