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wikipedia on differential amplifier

Discussion in 'Electronic Basics' started by Tolstoy, Aug 12, 2007.

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  1. Tolstoy

    Tolstoy Guest

    take a look at wikipedia's long-tailed pair diagram under the
    differential amplifier listing:
    I think they have the inputs labeled backwards.
    I went to the discussion page, and somebody had pointed this out, and
    somebody responded "the gain is negative by convention." Is that
    true? It's not how op-amp inputs are labeled.
  2. Phil Allison

    Phil Allison Guest


    ** Why ?

    Read the caption for the diagram:

    " A long-tailed-pair (LTP) differential input stage with current-mirror load
    and constant-current drive used in discrete VFB amplifiers." ( VFB =
    Voltage Feed Back )

    See the arrow labelled " to next stage" - so is NOT the output, another
    stage exists that will invert the signal polarity before it becomes the

    ........ Phil
  3. Bret Cahill

    Bret Cahill Guest

    Wiki is the greatest thing since the Clintons but it is still often
    weak in tech fields.

    Bret Cahill
  4. Phil Allison

    Phil Allison Guest

    "Bret Cahill"

    ** But nothing is as pissweak as fuckwit wankers like you.

    ........ Phil
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