Re: gEDA-user: mosfet design help

["phil@xxxxxxxxxxxxx" <phil@xxxxxxxxxxxxx>]

carzrgr8@xxxxxxxxxxxxx wrote:
> Dan, are you saying that the Cgd will allow the fast transient input to 
> couple to the output?

Clamps may be able to reduce some of the slewing of your 50V signal that 
you'd end up with if you just used a divider.  Maybe clamp each vgs to 
the opposite rail ... your fets will love getting switch with a 10 volt 
gate drive.

But wait!  Doubting you'll have a super square 500kc PA, the clamps will 
cause distortion ... since they'd change the waveform you're trying to 
accurately monitor.  Maybe the clamps are not such a good idea?

Thinking about it, though, any logic between your PA and the sensing 
circuit will cause distortion ... I don't know if you can tolerate it or 
not.  Maybe you can get the op amp to flip your signal, if that has to 
happen.

pt


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