Talk:Operational transconductance amplifier

message: I just looked at the reference "Comparison of Operational Transconductance Amplifiers"... and my gut feeling is that it contains very grave measurement errors. Not blaming the author... the things he is trying to measure are not easy to get right unless with extremely well controlled setups. I am especially worried about the hysteresis effects that he seems to observe. One can be almost sure that they are either software, data acquisition artifacts or temperature effects. I do not think that the resulting data is very helpful for a characterization of OTA circuits and particular products. I am sure one can find much better sources for an encyclopedic article about OTAs.   —Preceding unsigned comment added by 76.126.52.72 (talk) 16:20, 15 April 2011 (UTC)
thread_title: General Comments

message: The article says:
:The amplifier's voltage gain is the product of its output current and its load resistance:
:G_\mathrm{voltage} = I_\mathrm{out} \cdot R_\mathrm{load}
Shouldn't that be the output voltage?
:V_\mathrm{out} = I_\mathrm{out} \cdot R_\mathrm{load}
The voltage gain would then be the output voltage divided by the differential input voltage:
:G_\mathrm{voltage} = {V_\mathrm{out} \over (V_\mathrm{in+} - V_\mathrm{in-})} = {I_\mathrm{out} \cdot R_\mathrm{load} \over {I_\mathrm{out} \over g_\mathrm{m}}} = R_\mathrm{load} \cdot  g_\mathrm{m}
The units match, too. — Omegatron 15:37, 24 July 2006 (UTC)
replies: text: Omegatron, you're correct.  I don't know what I was thinking of but it was probably a result of being up too late at night when I wrote this.  Thanks for catching the error.  Do you want to make the substitution or shall I? Anoneditor 19:16, 24 July 2006 (UTC)
thread_title: Voltage gain

message: What is the difference between a "Norton amplifier", a "current-mode amplifier", a "current feedback amplifier", a transimpedance amplifier, and a operational transconductance amplifier?
I suspect they all may be exactly the same thing, in which case this article should mention these common synonyms (and the redirects should point here).
Even if they are significantly different things, I think they have a close enough relationship that they should all be at least mentioned in this article (with a link to some other Wikipedia article with more details).
--68.0.124.33 (talk) 14:30, 28 August 2008 (UTC)
replies: text: The difference is that the OTA uses voltage feedback and it's output impedance is extremely high (for most practical applications, approaching the infinite).  It's input impedance is usually high because of the nature of its input stage, i.e., a two transistor differential amplifier.  The current feedback amplifiers generally have low input impedance (because they use current mirror inputs) and low output impedance (because they use output buffers.  The similarity between the two is that they are often both used with feedback, but their input and output impedance differences make a big difference in the uses to which they can be put.Anoneditor (talk) 17:44, 29 August 2008 (UTC)
thread_title:  current-mode amplifier 

message: Hello fellow Wikipedians,
I have just modified  on Operational transconductance amplifier. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
*Added archive http://web.archive.org/web/20150130132158/http://www.intersil.com:80/en/products/amplifiers-and-buffers/all-amplifiers/amplifiers/CA3080.html? to http://www.intersil.com/en/products/amplifiers-and-buffers/all-amplifiers/amplifiers/CA3080.html
*Added archive http://web.archive.org/web/20141010084814/http://www.schmitzbits.de:80/ota3080.html to http://www.schmitzbits.de/ota3080.html
*Added archive https://web.archive.org/web/20110927084725/http://users.ece.gatech.edu/~lanterma/studentprojects/TeamOTAComparison.pdf to http://users.ece.gatech.edu/~lanterma/studentprojects/TeamOTAComparison.pdf
When you have finished reviewing my changes, please set the checked parameter below to true or failed to let others know (documentation at ).
Cheers.—InternetArchiveBot (Report bug) 15:57, 16 July 2016 (UTC)
thread_title:  External links modified