Need help on a time-invariant circuit design assignment

Discussion in 'Homework Help' started by hajime878, Jan 14, 2018.

  1. hajime878

    Thread Starter New Member

    Jan 14, 2018
    4
    0
    Hello everyone,
    I got a circuit design assignment that I have no clue at all about it. I have to design a time-invariant circuit that provides input-output characteristic as shown in the image below,

    [​IMG]

    The design problems are specified below:

    • continuous-time, memoryless, time-invariant circuit
    • The design uses MOS (ALD1101, ALD1102, IRF510, IRF9510)
    • The characteristic need not be a sinusoidal function.
    • Uses 1-V supply
    • The challenge is to maximize the swing V_0
    note: the horizontal axis is V in and not time

    Really I have no clue at all about this problem. The only approach that crosses my mind is to implement time-invariant system y(t) = sin(x(t)). But, I am sure that it is not the solution to the problem.

    Your time and help will be greatly appreciated. :)

    Mod: moved to Homework
     
  2. petecubed

    New Member

    Jan 14, 2018
    9
    1
    Are these small SIG FETs ?
     
  3. hajime878

    Thread Starter New Member

    Jan 14, 2018
    4
    0
    I don't have a clue. But do you have any approach to solve the problem yet?
     
  4. petecubed

    New Member

    Jan 14, 2018
    9
    1
    yea vo = sin vin
    In radians sin π vin / v1
    But how to implement ?
     
  5. petecubed

    New Member

    Jan 14, 2018
    9
    1
    While I was waiting they are n and p MOSFETs so I'll just solve it if u ever figure how to reply I will tell u
     
  6. hajime878

    Thread Starter New Member

    Jan 14, 2018
    4
    0
    Sorry for the late reply. Yes i was also thinking about Vo(t) = sin( Vo(t) ). But how to implement?
    And notice that one of the design problem is the voltage transfer characteristic need not to be sinusoidal. So i was thinking about the other approach that i have not known, instead of Vo = sin Vi
     
  7. petecubed

    New Member

    Jan 14, 2018
    9
    1
    Vout(t) = 10 Vin(t)
    Vout(t) = sin {Vin(t)}
    are time invariant
    The first one is a linear amplifier with gain 10
    The second is a non linear amp who's gain depends on input voltage

    Vout(t) = t Vin(t)
    Vout(t) = sin(wt) Vin(t)
    Are time varient
    The second is a signal modulator

    Great convo so far

    But how to implement ?
     
  8. petecubed

    New Member

    Jan 14, 2018
    9
    1
    Yea cool
    So u want a non linear amp
    If not sinusoidal then what exponential
    Gain depends on input voltage
    Set the bias level of a fet amp near its gate pinch off region
     
  9. hajime878

    Thread Starter New Member

    Jan 14, 2018
    4
    0
    Thank you Sir
     
  10. petecubed

    New Member

    Jan 14, 2018
    9
    1
    Yea

    Easy, even 900 horses don't have my intelligence level
     
Loading...