Struggling in designing PMOS based Common-Drain Amplifier

[ElieKhoury]

I am trying to design a PMOS based Common-Drain with 2 Power Supplies.
Every time I try simulating the PMOS starts out in the triode region, then after a while enter the saturation region.
How can I fix that? It is required that the gain of the amplifier is greater than -3dB.

 

[FvM]

I can't recognize an amplifier, soure and drain are shorted by voltage sources, where's the output? A common drain amplifier needs current source or load resistor at source node.

 

[ElieKhoury]

I can't recognize an amplifier, soure and drain are shorted by voltage sources, where's the output? A common drain amplifier needs current source or load resistor at source node.

Yes I know, but I am still at the stage of working out the voltages and characteristics (Vth, VA, gm...) of the PMOS before I add the current source. The output is obviously at the source as it is a common-drain.