[sdiy] JFET switch question

[JH.]

>However, to be clear, in the circuits in these books I'm looking at the cap
>shunts the diode (i.e. is in parallel to it), and is *not* connected to
>ground: JFET gate to anode + one end of cap; switching voltage to cathode +
>other end of cap. Thus when the voltage switches, it is possible for a
>'spike' to get through the cap. (I think I just about see the switching 
>'on'
>case, but not 'off' yet...)

Well then, _that_ is the classic way to speed up switching by providing a 
low impedance path dynamically, for charging and discharging an internal or 
parasitic capacitance. (Practically the opposite of what I had in mind.)

JH.