John Curl's Blowtorch preamplifier part II - Page 2059

ticknpop · 09:24 PM

Remy, Hennessy, Martell, Courvoisier, Robin ?

John - may all your snifters be XO - Happy Birthday.

john curl · 13th February 2012, 10:21 PM

OK, let's talk about something useful, whatever that is.

jacco vermeulen · 13th February 2012, 10:24 PM

HB, Mr Curl, may you be designing till all discrete parts have left this planet.

(no better headache than with a Bacardi Otard gold)

wayne · 13th February 2012, 10:28 PM

[QUOTE=john curl;2904873]I think that this 'parsing' of words with regard to 'popcorn noise' just confuses the issue. Both Scott and Ed are correct from THEIR reference point, but what matters is what 'popcorn noise' is defined as, TODAY, not 80 years ago.
The reason this is important is that '1/f noise' has a rise of 3dB/octave, and 'popcorn noise' has a rise of 6 dB/octave, and they are caused by somewhat different mechanisms. In truth, we hardly know how '1/f noise' is actually created.

We now know that 1/f noise comes from e hopping in Coulomb glass formed by impurities in the semis. Not that it helps us much and this only applies to semis and not the rest of the worlds 1/f noise.

john curl · 13th February 2012, 11:03 PM

Wayne, do you think that you can explain the 1/f noise in a given jfet over temperature? (hint, I doubt it)

john curl · 13th February 2012, 11:05 PM

Jacco, I am using them up as fast as I can! '-)

DarthBubba · 13th February 2012, 11:34 PM

Happy Birthday, JC.

And may your first words tomorrow NOT be "Where am I, where are my clothes, and who are all these people staring at me"

SY · 14th February 2012, 01:52 AM

You know it's been a good party when the first thing you remember when you wake up is a bunch of people looking over you and one of them shouting, "CLEAR!"

jam · 14th February 2012, 02:57 AM

Happy Birthday Mr.Curl.................

simon7000 · 14th February 2012, 02:26 PM

Quote:

Originally Posted by SY

You know it's been a good party when the first thing you remember when you wake up is a bunch of people looking over you and one of them shouting, "CLEAR!"

I think I'll skip your idea of a good time!

I did post a diatribe @ More magic stones and hockey pucks

13th February 2012, 09:17 PM	#20581
ticknpop diyAudio Member Join Date: May 2005 Location: toronto	Remy, Hennessy, Martell, Courvoisier, Robin ? John - may all your snifters be XO - Happy Birthday. Last edited by ticknpop; 13th February 2012 at 09:24 PM.

13th February 2012, 10:24 PM	#20583
jacco vermeulen diyAudio Member Join Date: Oct 2004 Location: At the sea front, just under Rotterdam	HB, Mr Curl, may you be designing till all discrete parts have left this planet. (no better headache than with a Bacardi Otard gold) __________________ Looks like Sponge Bob has killed another thread.

14th February 2012, 01:52 AM	#20588
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	You know it's been a good party when the first thing you remember when you wake up is a bunch of people looking over you and one of them shouting, "CLEAR!" __________________ “There are no greater liars in the world than quacks, except for their patients.” - Benjamin Franklin

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13th February 2012, 10:21 PM	#20582
john curl diyAudio Member Join Date: Jul 2003 Location: berkeley ca	OK, let's talk about something useful, whatever that is.

13th February 2012, 10:28 PM	#20584
wayne diyAudio Member Join Date: Jan 2002 Location: Northern California	[QUOTE=john curl;2904873]I think that this 'parsing' of words with regard to 'popcorn noise' just confuses the issue. Both Scott and Ed are correct from THEIR reference point, but what matters is what 'popcorn noise' is defined as, TODAY, not 80 years ago. The reason this is important is that '1/f noise' has a rise of 3dB/octave, and 'popcorn noise' has a rise of 6 dB/octave, and they are caused by somewhat different mechanisms. In truth, we hardly know how '1/f noise' is actually created. We now know that 1/f noise comes from e hopping in Coulomb glass formed by impurities in the semis. Not that it helps us much and this only applies to semis and not the rest of the worlds 1/f noise.

13th February 2012, 11:03 PM	#20585
john curl diyAudio Member Join Date: Jul 2003 Location: berkeley ca	Wayne, do you think that you can explain the 1/f noise in a given jfet over temperature? (hint, I doubt it)

13th February 2012, 11:05 PM	#20586
john curl diyAudio Member Join Date: Jul 2003 Location: berkeley ca	Jacco, I am using them up as fast as I can! '-)

13th February 2012, 11:34 PM	#20587
DarthBubba diyAudio Member Join Date: Jan 2012 Location: The Heart of Darkness, GA	Happy Birthday, JC. And may your first words tomorrow NOT be "Where am I, where are my clothes, and who are all these people staring at me"

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