1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Finding the max. level of input signal in a mosfet

  1. Apr 8, 2012 #1
    1. The problem statement, all variables and given/known data


    2. Relevant equations

    values in part (a) and (b) which i had found:
    gm = 2.2mS
    ro = 25kΩ
    Rin = 1MΩ
    Rout = 446.43Ω
    Av = 0.99

    3. The attempt at a solution

    all that i know is that when they refer to pinch off region, it is refering to the saturation region which means:
    VDS ≥ VGS - VTN, where VTN = 1
    therefore VDS ≥ 5 -1 = 4

    solution given:
    VDS ≥ 4
    -Vo ≥ 4
    Vo ≤ 4
    Av Vi ≤ 4
    Vi≤ 4/Av
    Vi≤ 4/0.99
    Vi≤ 4.04V (ans)

    my qn would be how did they show that
    VDS ≥ 4
    -Vo ≥ 4
  2. jcsd
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted