"low output impedance" v.s. "rail-to-rail out

[orap]

hi there,

Is there any reference materials which addresses the problem between "low output impedance" and "rail-to-rail output range"???

I need to have a rail-to-rail output with low output impedance in a standard CMOS process. It just kills me.

Thanks.

Aaron

 

[ambreesh]

Re: "low output impedance" v.s. "rail-to-rail

It is just a thought, can we not buffer (unity gain configuration amp) at output of a class AB (rail-rail) stage.

 

[ezpcb]

Re: "low output impedance" v.s. "rail-to-rail

what's the output impendence do you preferring? a R-R OPAMP plus push-pull MOSFET pair is an option.

mike

-------------------------------------------
www.ezpcb.com

 

[namrta]

Re: "low output impedance" v.s. "rail-to-rail

a 2 stage amp with push-pull output will do
what configuration r u using?

 

[qslazio]

push-pull source follower will provide low output impedence as well as r-2-r signaling

 

[srivatsan]

Re: "low output impedance" v.s. "rail-to-rail

This IEEE paper should help you.
regards,
srivats