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Question for those familiar with IIL (integrated injection logic)

  1. Mar 12, 2013 #1

    FOIWATER

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    Attached is a picture of IIL (integrated injection logic) cell. I understand the operation of the second (bottom-most) transistor, and analysis of digital circuits is adequate only understanding the operation of this transistor.

    I do not understand the operation of the transistor with grounded base. Does it act as some sort of voltage regulator?

    Any information, is appreciated.
     

    Attached Files:

  2. jcsd
  3. Mar 12, 2013 #2

    phyzguy

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    I don't know the answer to your question, but FWIW, I don't think anybody uses IIL anymore. It was conceived back in the 1970's, and CMOS logic has come so far since those days that I don't know why anyone would care about IIL. Perhaps your question is just intellectual curiosity, but if you are learning about logic families I would suggest focusing elsewhere.
     
  4. Mar 12, 2013 #3

    FOIWATER

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    I have received almost an identical response regarding a CMOS inquiry.

    IIL has its applications, any information is appreciated.
     
  5. Mar 12, 2013 #4

    AlephZero

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  6. Mar 12, 2013 #5

    FOIWATER

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    I read that article and still wasn't sure what the transistor is for.

    It isn't wrong - do a google search for images on IIL, you will get as many or more hits of the circuit I posted.
     
  7. Mar 12, 2013 #6

    FOIWATER

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    In fact, if it acts as a current source, they would be the same circuit.

    any one know if that is the case
     
  8. Mar 12, 2013 #7

    dlgoff

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    The only one I see is the one from AlephZero's link.
     
  9. Mar 12, 2013 #8

    FOIWATER

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    how about the one i've attached.
     

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