JFET Buffer Bias Calculator
A JFET buffer (Common Drain Amplifier) is useful in
that it has extremely high input resistance as compared to a BJT
buffer. The input resistance is equal to RG, which is typically very
large, on the order of 1M ohm.
Equations:
IDS= IDSS(1-VGS/Vp)2
RS= VRS/IDS