Square law model with channel length mod
n Cox W ID = (VG S Vt )2 1 + n 2 L 24443 1444 4 4
ID-sat term (at pinchoff) + "extra"
Square law model with channel length modulation
n Cox W 2 ID = VG S Vt ) 1 + ( n 2 L 24443 1444 4 4
IEEE JOURNAL OF SOLID-STATECIRCUITS, VOL.
Op Amp: A Tutorial Study
AbsfracfA study is made of the integrated circuit operational amplifier (IC op amp) to explain de
Studio 2 Review Motion of carriers in semiconductor: Mobility Channel: Accumulation, Depletion, Inversion Threshold voltage VTH Gate-source overdrive voltage VGS-VTH V-I characteristic of MOSFET channel Small VDS: D-S channel looks like resistance Ron Ove
Studio 3 Review MOSFET as current source Small VDS: Resistor (value controlled by VGS) Large VDS: Current source (value controlled by VGS)
Simulation Review: Circuit Fixed VGS, Sweep VDS ID
Simulation Review: Result Follows linear Ron model only f
Studio 5 Review Current Source Active Load Bandwidth of Common Source Amplier
Current source Ideal goal Small signal model: Open circuit RD=
Realizing current source: MOSFET Large signal nonideality: "Compliance range" Looks like current source only f