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Explanation of band diagram of MOSFET

  1. Feb 4, 2012 #1
    Why the voltage drop across the insulator is linear in the band diagram of a MOSFET??
     
  2. jcsd
  3. Feb 4, 2012 #2

    It's because the oxide is considered to have no current and no charge; therefore, from Gauss Law: dE/dx = ρ/ε = 0... ergo E = constant. As dV/dx = E, V is linear with distance.
     
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