（Triode region）n-channel MOSFET

Triode Region The voltmeter voltage is controlled by the independent voltage source. If the voltage source is 5V. More precisely Vgs >= Vth and Vds < Vgs - Vth. Vth = VTO = 3V K = 1 mAV^-2 Id = K/2 * (Vg - Vth)^2 = 1/2 * (5V - 3V)^2 = 0.5 * 2^2 = 2mA Vds = Vd - (Id * Rd) = 10 - (4.5kohm * 2mA) = 1V (<2V) (rejected) Id = K/2 * Vds [2 (Vgs - Vth) - Vds] = 0.5 * Vds (4 - Vds) = 0.5 (10 - 4.5 * Id) (4 - 10 + 4.5 * Id) 10.125 * Id^2 -35 * Id + 30 = 0 Id = 1.8845mA, 1.5742mA when Id = 1.8845mA, Vds = Vd - (Id * Rd) = 10 - 1.8845mA * 4.5kohm = 1.54V when Id = 1.5742mA, Vds = Vd - (Id * Rd) = 10 - 1.5742mA * 4.5kohm = 2.95V (rejected) That's it, 10V input (independent voltage source) = 3.25V output (voltmeter) with Id = 1.8845mA. Notice: 1. Width = 90 nm 2. Length = 119 nm 3. KP = 1 mA/V^2 4. VTO = 3V 5. Lambda = 200 m1/V

published 1 year ago