MOSFET Design

Discussion in 'Homework Help' started by MarsG, Oct 5, 2015.

  1. MarsG

    Thread Starter New Member

    Sep 12, 2015
    24
    1
    I am required for my homework to design a mosfet with a drain current of 6mA and a 20V source voltage, I am first to design it by hand and calculate all the currents and voltages, than compare them to the pspice simulation. I did the by hand calculations but my by hand numbers do not match with the pspice sim. I posted below all my work and the pspice sim.

    Would be thankful if someone could help me figure out where I went wrong.
     
  2. Jony130

    AAC Fanatic!

    Feb 17, 2009
    3,962
    1,098
    Why you replace (1+lamda*Vds) with (1+lambda*(Vgs - Vt)) ??
    Also Id = 6mA if Vds = 20V and Vgs = 2.85164V. For Vds = 10V you need to change Vgs to Vgs = 3V. As for the simulation, have you change the mos model ??
     
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    Last edited: Oct 6, 2015
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