Lab Document: Extraction of MOSFET Parameters using 4007 Array
My PDF Solution – Warning Will Robinson: I never get 100% correct!
The following two measurements are where the MOSFET is in saturation and use the 8if method to nd ISpecific. In this
case because we are looking into the MOSFET source circuit we do not have to worry about slope factor n: Simply go to the
point where gms/ID=20 and read o the current the divide by 8 to arrive at the speci c current.
Vgate = 2:0 VD = 5 : Ispecific = 0:735 uAmp
Vgate = 1:7 Nominal Vt VD = 5 : ISpecific = 0:92 uAmp
The triode region determination of speci c current is a little more complicated. I used Vds=15mVolts which results in if = 3
and ir = 2 which is convenient in the last part of the calculation of speci c current.
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