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Who can help me think about the negative feedback in analog circuit?

Discussion in 'Electronic Design' started by [email protected], Mar 31, 2006.

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  1. Guest

    In the voltage-current negative feedback,what is the value of the
    negative feedback voltage of the output voltage?
    It says that "Vref=Vo*Re1/(Re1+Rf)" in the text book,why is that?
    Should I consider the output resistance of the emission pole of the
    first transistor?I think the Re1 should be taken place by
    Re1//(rbe/(ß+1)),and there also should be an equivalent negative
    voltage that equals to be vi*rbe/(Re1*(ß+1)).
    I think there may be something wrong with my consideration, who can
    help me?
    Is there any way to upload the schematic?
    Thanks in advance!
     
  2. Deefoo

    Deefoo Guest


    alt.binaries.schematics.electronic or draw it in ASCII with AACircuit for
    instance.

    --DF
     
  3. JeffM

    JeffM Guest

    Is there any way to upload the schematic?
    This is what most folks use (as already mentioned)
    Andy's ASCII Circuit, courtesy of Andreas Weber:
    http://translate.google.com/translate?u=http://www.tech-chat.de/aacircuit.html+&langpair=de|en

    (Word-for-word language translation is always entertaining.
    Judging by your name, this could be a double-whammy.)

    Because this group is text-only and Usenet is archived,
    http://groups.google.com/group/sci.electronics.design/browse_frm/thread/e44ab6be6cc474d9
    ASCII diagrams are, IMO, the way to go.
    ..
    ..
    In addition to a.b.s.e, as mentioned
    there is a third way (IMO, far inferior) way:
    Park the picture on an image server:
    http://www.google.com/search?q=image-hosting
     
  4. Guest

    Thank you very much!
     
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