Hi there,
I been out of the forum for a long time for some reasons but let me cut all that... I was trying to make a FM transmitter but I needed to revise my BJT and oscillator practicals for that, which I did moderately, I made a tutorial for those who are interested, so see the attachment.Having said all that, for JFET I have tried to derive that shockely equation in this tutorial which needed to be verified by some experienced member So I'll be grateful if any one do that for me, I refered Sedra- Smith book for that in which equation for E-MOSFET is derived, this one in attachment is for JFET.
EDIT: see appendix of attachment for that equation