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3rd July 2008, 10:56 PM
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#21 |
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diyAudio Member
Join Date: Oct 2004
Location: At the sea front, just under Rotterdam
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3rd July 2008, 11:11 PM
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#22 | |
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Official Court Jester
diyAudio Member
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
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Quote:
you must count on increased xconductance , with more outputs , so that ratio between No. of devices/difficulty to drive isn't quite linear
__________________
my Papa is smarter than your Nelson ! tnx to  clean  thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery
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4th July 2008, 01:36 AM
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#23 |
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The one and only
Join Date: Mar 2001
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The part that is linear is the Cgd, which is quite a bit smaller than
Cgs. Driving Cgs has the same compensating effect - there's more Cgs to drive, but it takes less voltage to drive it. |
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4th July 2008, 06:52 PM
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#25 | ||
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diyAudio Member
Join Date: Nov 2002
Location: Vienna, Ostrich
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Quote:
But I need some more help to understand : What would be exactly the effect of a "noisy" supply? Quote:
Thanks for link ... but in defence of my inattention I must say I was not really aware of this question. Usually you don't see what you don't know... Manu |
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4th July 2008, 07:04 PM
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#26 | |
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The one and only
Join Date: Mar 2001
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Quote:
noise on the supply is injected into the output. |
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5th July 2008, 12:00 PM
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#28 |
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diyAudio Member
Join Date: Apr 2007
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Nelson, The increased bias current is shown to be a major improvement by the graphs provided. Is there any correlation that relates to the actual heat of the output devices. Does this heat which is causing the molecular particles to move faster attribute any advantages? I know there is a practical limit here.
Very nice article, makes things much easier to understand. Tad |
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5th July 2008, 11:37 PM
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#29 |
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The one and only
Join Date: Mar 2001
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There is a subtle performance difference with devices running a
little hotter, but mostly we make sure that we do all our adjustments at normal operating temperature, and that means that we often have to re-adjust after warm-up and burn-in. |
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By the way, if we connect more devices parallel, the capacitance also increases, making the output more difficult to drive?
