Common gate amplifier gain

[reyhane12]

Hello,
How can we calculate a common gate amplifier gain which doesn't have any resistance in its drain? ro is neglected.

 

[FvM]

There will be a load impedance.

 

[reyhane12]

There will be a load impedance.

The circuit is attached.
https://obrazki.elektroda.pl/5960498500_1483097304.png

- - - Updated - - -

There will be a load impedance.

I don't understand, would you explain more?
I have sent the circuit.

 

[FvM]

The circuit is incomplete. Presumed there's an ideal bias circuit and you are asking for voltage gain.

Under your over-simplified assumptions, voltage gain is infinite. As simple as meaningless.

 

[LvW]

Each transistor based amplifier needs a supply voltage.
Gain properties can be discussed for a working system only.