Bistalbe circuit (pnp)

Discussion in 'Homework Help' started by AlexK, Sep 28, 2007.

  1. AlexK

    Thread Starter Active Member

    May 23, 2007
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    Hi,
    I'm having some trouble solving the following bistable circuit:
    What are the stable states, what is Voh and Vol?
    And what is the general approach for circuits of this kind?

    [​IMG]

    Thanks.
     
  2. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    You need to find another way to post your schematic. That looked too much like an invitation to a virus.
    You can post .jpg, .gif., .png, etc., here. Use the "manage attachments" button below the text window.
     
  3. AlexK

    Thread Starter Active Member

    May 23, 2007
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    Ok, I posted it as a jpg.
     
  4. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    I don't see it.
     
  5. AlexK

    Thread Starter Active Member

    May 23, 2007
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  6. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    There is no value for R2.


    Below is the circuit posted using the Manage Attachments button. Try it - you'll like it, and so will we.
     
  7. AlexK

    Thread Starter Active Member

    May 23, 2007
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    R2=19kOhm, Beta=150.
    sorry, and thanks for your patience.
     
  8. techroomt

    Senior Member

    May 19, 2004
    198
    1
    your schematic appears to be a (digital output) bistable multivibrator, or flip flop, driven by the charge times of the collector capacitors. which are what capacitance?
     
  9. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    I can't see what difference capacitance makes in determining what he wants to know.
     
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