Re: gEDA-user: ngspice shot noise

[Karel Kulhavy <clock@xxxxxxxxxxxxx>]

> >>thermal noise due to base resistance were your limiting factor.
> >
> >
> >Because only RF transistor has transition frequency of 25GHz.
> >
> 
> Fight, but you said you were going to use this where a 2N3904 would have 
> enough speed so why do you need a 25 GHz Ft?  Also you said you were 
> going to run at a current level low enough to drop the Ft down to 300 MHz.

Because 2N3904 will have enough speed at 5mA collector current which
generates huge shot noise. 25GHz Ft will have 300MHz speed at I don't
know 1uA of current which will generate substantially less noise?

CL<