Inverting vs. Noninverting

[Pete Basel (PB2)]

How many here are on Linnkedin, can non members read this?
http://www.linkedin.com/groupItem?view=&gid=2408733&type=member&item=9991042&qid=21948f8c-9bed-4fdd-9541-f9307afc3674&goback=%2Egna_2408733

No.

The question in case you are interested:
Correlating Multi-Tone with individual Sinusoidal Tone Measuements?

Since 1989, the value of modern multi-tone (greater than twin-tone) stimulus and response has been establshed for being quick and comprehensive, yielding a complex array of both linear and non-linear arifacts for analysis. Yet, for all its bells & whistles, there is a great deal of misunderstanding in how and when to apply it, and little has been done in the way of correlating resulting measrements back to traditional sine wave (or noise) stimulated testing. As a result, few, if any, standards have been established for the use of this method and test engineers continue to be reticent to jump into the pool.

What should be done about this ??

You are invited to share your questions and understanding with the group.

[andy_c]

This is by a manufacturer so it is slanted toward selling product:
http://www.listeninc.com/PDFs/paper_121AES_non_coherent_distortion_Listen_Inc.pdf

That's an interesting article.  I have the Schetzen book on Volterra-Wiener theory, but it's a very tough read - hard to glean any practical information from it.  One thing that cracks me up though, is that one of Wiener's Ph.D students is a very famous audio guy - Amar G. Bose!

Edit:  Here's a couple more Volterra-Wiener links for those interested:
http://lanoswww.epfl.ch/studinfo/courses/cours_nonlinear_de/extras/Rugh%282002%29_Nonlinear%20Systems%20Theory_The%20Volterra-Wiener%20Approach.pdf

http://rfic.eecs.berkeley.edu/~niknejad/ee242/pdf/ee242_lect11_volterra.pdf

[GK]

There were claims to that effect with regard to TIM, but those were debunked by Walt's articles that showed strong correlation between TIM and large-signal, high-frequency THD.

That, I’d say, just showed that TIM is really nothing more than a product of slew rate limiting – and therefore perfectly predictable and easily designed out – use as much global and/or nested feedback as you fancy, but just make sure to design for a healthy full power (closed loop!) bandwidth. Talk about clearing the fog that everyone who followed Mr Otala drove into.