Drain with large amplitude

[praveen450]

Hi,

My question is

If the amplitude of the signal at drain is very large, (say 0 to 2V sine wave) for 2.2V power supply. And if I bias the transistor greater than threshold voltage. Will the transistor operate in triode and saturation region?.

If so, will the transistor has power dissipation in it?.

Praveen

 

[skamthey]

Hi Praveen,
Say you made Vgs(500mV) -VT(400mv) =100mv Then as long as your drain voltage is greater than 100mv Your Mos will be in saturation region. for ) to 100mv it will be in triode region.
For NMOS: Vds=> Vgs-Vt for Saturation