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Single Rail Op-amps

Discussion in 'Electronic Design' started by [email protected], May 29, 2007.

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  1. Guest

  2. Hi,
    Yes, but this Picture is a little wrong ;-)
    Place C2 to one pole of the battery. The resistors don't have to be
    symmetrical, especially if the amplifier isn't symmetrically too. TLC27x for
    example can reach negative rail but not the positive. with 3V3 supply there
    is only 2V useful. There we use 1V as "virtual ground".

    Hey Jörg, kannst Du mal übersetzen? Wir sprechen hier gern von
    "Bezugspotential" im Gegensatz zu "Masse". Fürs Englisch kenn ich da immer
    nur "ground". Aber "Erde" ist dann ja doch noch einmal was anderes, nicht?

    CU
    Marte
     
  3. kell

    kell Guest

    In the analog.com paper, somebody got lazy. They had arrived at each
    previous diagram by making a slight modification to the one before --
    leaving component values, ground symbols etc unchanged. They
    continued that practice into diagram #7. Wrong!
    And what about the bypass caps on the power pins of the op amp in that
    diagram. Doesn't it look like they should go to the battery?

    When somebody at edu.com needed a diagram, he apparently copied
    diagram #7 off the analog.com paper without examining it carefully.
    (You will notice that along with having the same error, it has the
    identical component values.)
     
  4. Nicht Jörg, aber vielleicht trotzdem: Masse ist normalerweise "ground".
    (Schutz)erde ist "safety ground". Bezugspotential könnte "reference
    voltage" sein, oder auch "virtual ground".

    Gerhard
     
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