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27th August 2008, 06:27 AM
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#1 |
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diyAudio Member
Join Date: Jul 2005
Location: milan
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The ThunderGold AMP
hello friends
see this project for a better world: auto biasing high definition low power self thermal drifting adj
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27th August 2008, 07:03 AM
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#2 |
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diyAudio Member
Join Date: Sep 2006
Location: Graz, Austria
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Hi Stee,
maybe it's just me, but I don't understand your drawing. If that's the full amp on the right hand side, then I would say you really don't want to cut the input signal with diodes. Sure they're necessary for biasing, but in that case you would need to AC-couple. For AC-coupling a set of resistors would do the job as well. Or a current source to boost PSRR. But maybe the whole mystery lies in the left hand side of your drawing? Have fun, Hannes
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fresh matched IRFP240/IRFP9240 fets  || AlephJ/JX-kitsF5 transistor kits || Burning Amp BA-1/2/3 transistor kits |
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27th August 2008, 09:26 AM
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#3 |
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diyAudio Member
Join Date: Jul 2005
Location: milan
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diode don't cut signal
see here
www.esafono.it/a700.pdf
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visit my best audio idea http://www.esafono.it/DACTONE.htm |
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27th August 2008, 09:30 AM
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#4 |
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diyAudio Member
Join Date: Sep 2006
Location: Graz, Austria
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Hi Stee, you're of course perfectly right
 I need to pay more attention, sorry! Have fun, Hannes
__________________
fresh matched IRFP240/IRFP9240 fets || AlephJ/JX-kitsF5 transistor kits || Burning Amp BA-1/2/3 transistor kits |
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27th August 2008, 10:38 AM
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#5 |
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diyAudio Member
Join Date: Oct 2004
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27th August 2008, 03:10 PM
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#6 |
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diyAudio Member
Join Date: Jul 2005
Location: milan
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thanks Giaime
learn before, nobody can learn a new idea
be creative 
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visit my best audio idea http://www.esafono.it/DACTONE.htm |
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27th August 2008, 06:31 PM
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#7 |
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diyAudio Member
Join Date: Jul 2005
Location: milan
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please edit
There ARE SOME EXPERTS TO ASSIGN THE VALUES OF RESISTANCE?
  
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visit my best audio idea http://www.esafono.it/DACTONE.htm |
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28th August 2008, 06:25 PM
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#8 |
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diyAudio Member
Join Date: Jul 2005
Location: milan
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Class A biasing
see the point of work for final bipolar
need 3R6 ohm on base to have 0.9V with 250mA from Mosfet
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visit my best audio idea http://www.esafono.it/DACTONE.htm |
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28th August 2008, 09:29 PM
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#9 |
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diyAudio Member
Join Date: Jul 2005
Location: milan
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do you think it's a good project?
Dimensioning is the second step
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visit my best audio idea http://www.esafono.it/DACTONE.htm |
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28th August 2008, 11:03 PM
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#10 | |
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diyAudio Member
Join Date: Oct 2004
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Re: thanks Giaime
Quote:
http://www.artlebedev.com/everything/vilcus/  
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