voltage levels conversion circuit

Discussion in 'General Electronics Chat' started by Ataleph, May 10, 2010.

  1. Ataleph

    Thread Starter Active Member

    Apr 20, 2009
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    Hi all,
    Please, help me with a circuit(at transistor level) which should convert a signal with logical "0"=0V and logical "1"=1.2V(or 0.9V) to a signal with logical "0">=0.3V (but not greater than 0.7V) and logical "1"=1.2V. I have two types of supplies 0.9V and 1.2V, any of which can be used or both.
    Thanks in advance. :)
     
  2. SgtWookie

    Expert

    Jul 17, 2007
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    Re-phrasing your request:

    Is this a homework assignment, by any chance?
     
  3. Ataleph

    Thread Starter Active Member

    Apr 20, 2009
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    Thanks for re-phrasing. Now it is much clearer. I hope someone will provide the solution.
     
  4. retched

    AAC Fanatic!

    Dec 5, 2009
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    What have you done so far? Where are you getting stuck?
     
  5. Ataleph

    Thread Starter Active Member

    Apr 20, 2009
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    So far I have nothing. I need the conceptual design itself, than I will be able to give appropriate values to devices (sizing etc.).
     
  6. SgtWookie

    Expert

    Jul 17, 2007
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    Is this an assignment given to you by a teacher/instructor/professor?
     
  7. Ataleph

    Thread Starter Active Member

    Apr 20, 2009
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    No, I just need it for a circuit I am building. Why are you asking
     
  8. SgtWookie

    Expert

    Jul 17, 2007
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    I'm asking because it rather sounded like such a project.

    See the attached; it's merely a simulation. Your mileage with actual components may vary.

    The incoming sawtooth wave is 20kHz. At low speeds, the switching occurs at 0.9v; but at 20kHz you can see the level is a bit off. It doesn't work at all at 100kHz.
     
  9. retched

    AAC Fanatic!

    Dec 5, 2009
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    We want to know where to file the thread.

    Where is the signal you want to boost or adapt coming from? A sensor of some kind?

    Do you need the output linear over the range, or just 2 outputs 0v and 1.2v
     
  10. Ataleph

    Thread Starter Active Member

    Apr 20, 2009
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    Thanks SGTWookie,
    That's what I need.:)
     
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