> > So if we ignore the input and output impedance the time constante is R1
> > and  R2 in parallell* C ?

> That's what I meant to say ( Rin near zero and Rout is near infinity.

Then in that case time constant is R1 x C.
R2 is "waving in the breeze" as it has a high impedance (=Rout) at it's
right hand end.



        RM

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