Multiple Stage Amp Project - easy

Discussion in 'Homework Help' started by rmaoun, Jun 13, 2016.

  1. rmaoun

    Thread Starter New Member

    Jun 13, 2016
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    0
    Hello!

    So I'm fairly new at electronics and I have this project I have to do. I suspect it is quite easy, compared to other projects I saw around here. I need as much help as someone can give me, at least a way to start it, because I tried a few times and nothing. I do know how to solve a few circuits (specially with BJT, less with MOS) but have never projected one.

    The project should be as follows:


    The input signal is Vin = 1mV, with a resistance of 600Ω
    The load resistance (RL) is 1KΩ
    Vcc is 10V


    3 stages:

    1) MOS amplifier with a gain between 10 and 20. I am supposed to use the 2N7000 (Vgs(th) = 2.1V). The input impedance should be one that allows at least 90% of the input signal to be delivered to the first stage;

    2) BJT amplifier with gain between 10 and 20. Supposed to use 2N3904. I also have to choose the type of polarization and justify my choice. The current dissipation on the transistor should not exceed 5mA;

    3) BJT voltage buffer. Using the 2N3904 and the current dissipation on the transistor must not exceed 1mA.

    *The coupling between each stage must be done with capacitors (assuming a frequency of 1kHz and maximum reactance of 0,35 Ω

    See the circuit attached.

    The curves for both transistors were also given (ID x VDS and IC x VCE)


    Thank you so much!
    Any help is appreciated.
     
  2. dl324

    Distinguished Member

    Mar 30, 2015
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    Welcome to AAC!

    Is this homework?
     
  3. rmaoun

    Thread Starter New Member

    Jun 13, 2016
    2
    0
    Thank you!
    Yes it is :)
     
  4. dl324

    Distinguished Member

    Mar 30, 2015
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    AAC members are expected to not do homework for students. Instead, students are expected to show their best efforts and members will guide them to a solution.
     
  5. WBahn

    Moderator

    Mar 31, 2012
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    MOD NOTE: Moved from Projects to Homework Help.
     
  6. dl324

    Distinguished Member

    Mar 30, 2015
    3,250
    626
    What does a typical common source/common emitter amplifier look like?
    If you post them, it might give us some ideas which direction your instructor intended for you to take.
     
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