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 29th June 2012, 10:15 AM #2601 jan.didden   diyAudio Member     Join Date: May 2002 Location: The great city of Turnhout, BE Edit above post: the 10uS in the first part should be 5uS of course. jan __________________ Music is dither to the brain; lets me think below the usual chaos - me Linear Audio Vol 13 is out! Check out my Autoranger and SilentSwitcher
wahab
diyAudio Member

Join Date: Nov 2009
Location: algeria/france
Quote:
 Originally Posted by janneman It is not dependent on slew rate.
We can agree that due to phase shift , and considering a sine
at the input , the output signal maxima will not occur at the same
moment that the input signal maxima , this is why some people talk
of delay , since this "delay" is function of the amp s slew rate , that is ,
the faster the amp the less the apparent delay , i.e , the phase shift.

 29th June 2012, 12:41 PM #2603 mikelm   diyAudio Member   Join Date: May 2003 Location: England My guess is that Jan will be tearing his hair out to read this . . . . That's if I understood his point correctly
Jay
Banned

Join Date: Feb 2003
Location: Jakarta
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 argh.GIF (12.3 KB, 375 views)

Nico Ras
diyAudio Member

Join Date: Nov 2005
Location: East Coast of South Africa
Quote:
 Originally Posted by wahab We can agree that due to phase shift , and considering a sine at the input , the output signal maxima will not occur at the same moment that the input signal maxima , this is why some people talk of delay , since this "delay" is function of the amp s slew rate , that is , the faster the amp the less the apparent delay , i.e , the phase shift.
A delayed sine wave will remain a sine wave, even if it is delayed by a few years. The apparent "speed "of an amp is purely a subjective observation, as it is not possible to hear any delay occurring from the input to output of an amp.
__________________
Kindest regards
Nico

jan.didden
diyAudio Member

Join Date: May 2002
Location: The great city of Turnhout, BE
Quote:
 Originally Posted by mikelm My guess is that Jan will be tearing his hair out to read this . . . . That's if I understood his point correctly
Yes...
But I've learned that when people don't get it the first time, there's no point in repeating it.
With forums like this, with lots of lurkers, the best you can hope for is that SOME people like you do get it.

jan
__________________
Music is dither to the brain; lets me think below the usual chaos - me
Linear Audio Vol 13 is out! Check out my Autoranger and SilentSwitcher

mikelm
diyAudio Member

Join Date: May 2003
Location: England
Quote:
 Originally Posted by Nico Ras A delayed sine wave will remain a sine wave, even if it is delayed by a few years. The apparent "speed "of an amp is purely a subjective observation, as it is not possible to hear any delay occurring from the input to output of an amp.
Unless you add feedback - then all kinds of mischief can be unleashed - some of it very audible.

sonnya
diyAudio Member

Join Date: Oct 2001
Location: Denmark
Quote:
 Originally Posted by janneman Yes... But I've learned that when people don't get it the first time, there's no point in repeating it. With forums like this, with lots of lurkers, the best you can hope for is that SOME people like you do get it. jan
How many Engineers do you Think would be released if it was only explained one time?!

In My case i have been studiyng it and succesfully inplementing it. But i have difficulties explain it in english and in writting. I use it every Day as i design RFID readers.

But every one Can be clever in theory. But if They Can not make s proper pcb design. Was is it then worth?

I have seen a lot of pcb design, and most of Them sucks regarding layout.

 29th June 2012, 05:47 PM #2609 mikelm   diyAudio Member   Join Date: May 2003 Location: England Yeah, I am happy to learn from qualified people some new details of understanding but despite what jan states below his posts, I tend to trust my ears even if it appears to disagree with some ones theory. Otherwise we can have technically brilliant amps that may sound dreadful I sympathise for all who have to make technical posts in foreign language - and I think people like me who only speak one language should be understanding on this.
sonnya
diyAudio Member

Join Date: Oct 2001
Location: Denmark
And Edmond, you are good no doubt about it. But i have seen no real work from your side besides sims??? Shows us some work you have actually put to work yourself.

And this is not your work, and it looks most likely as an autorouter has been used!???!!!

Then compare this with a mixed layout (The first picture) digital 16MHz and analog 17.1776MHz and 134.2KHz + 250KHz DC/DC converter.
Attached Images
 demo.jpg (218.1 KB, 348 views) frontend-pcb-s.jpg (80.5 KB, 334 views)

Last edited by sonnya; 29th June 2012 at 05:51 PM.

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