I was wondering whats the main advantage of choosing one over the other, besides common drain having to suffer body effect. How do we determine if a CC is better or a CD is better to use as a buffer?
Finally getting back to the "good ol' days" of the familiar cathode bias circuits.[Something like an MPF102 actually requires a negative voltage on the gate (relative to the source) to bias it.
This makes the biassing a little more complex as a large source resistor may be needed for the load but a smaller one may be needed for the biassing. So, such circuits often have both.
They have a small bypassed source resistor for bias purposes and a larger unbypassed one for the load. A gate resistor takes the voltage between the two to the gate.