take a look at wikipedia's long-tailed pair diagram under the
differential amplifier listing:
http://en.wikipedia.org/wiki/Differential_amplifier
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.

"Tolstoy"

> take a look at wikipedia's long-tailed pair diagram under the
> differential amplifier listing:
> http://en.wikipedia.org/wiki/Differential_amplifier
> I think they have the inputs labelled backwards.


** 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
output.





........ Phil

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


Bret Cahill

"Bret Cahill"

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


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





........ Phil