Home › Forums › density functional theory › functions and functionals › Functional This topic has 0 replies, 1 voice, and was last updated 2 days, 9 hours ago by sharif.hasan. Viewing 1 post (of 1 total) Author Posts June 26, 2025 at 10:35 am #12612 sharif.hasanParticipant The general expression of voltage gain of transistor based amplifier: Av = −gm · RL Here, gm = dId/dVin = 2Id/(Vgs-Vth) and Vin = Vgs. Av[gm] = dId/dVin . RL | Vin = Vgs at a fixed Vgs = Vin and RL, the voltage gain is the functional of the drain current, Id. Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In