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Simplistic NJFET RIAA
Simplistic NJFET RIAA
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Old 30th December 2010, 01:21 PM   #5691
SGregory is offline SGregory  United States
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In looking at that, I am having a hard time understanding how that would work. I would think the three error amps could fight each other and not be able to do their jobs.
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Old 30th December 2010, 02:33 PM   #5692
Salas is offline Salas  Greece
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Simplistic NJFET RIAA
They are supposed to be looking on separated load nodes. Or at least that is what I thought was the idea. I would prefer to give chance to a dedicated first stage low Z active noise filter on the rail than all this complexity and dissipation non the less.
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Old 30th December 2010, 06:07 PM   #5693
RCruz is offline RCruz  Switzerland
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Quote:
Originally Posted by massimo View Post
see attachment
Now this looks like a good idea.
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Old 30th December 2010, 06:08 PM   #5694
RCruz is offline RCruz  Switzerland
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They are supposed to be looking on separated load nodes. Or at least that is what I thought was the idea. I would prefer to give chance to a dedicated first stage low Z active noise filter on the rail than all this complexity and dissipation non the less.
Even better idea... would you please explain how to build such a filter ?
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Old 30th December 2010, 06:13 PM   #5695
Salas is offline Salas  Greece
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Don't know yet, I have a bunch of extremely low noise BJT types that I will have to experiment with in a future build opportunity.
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Old 30th December 2010, 06:32 PM   #5696
RCruz is offline RCruz  Switzerland
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I am ready for beta testing.... please let me know if I can mod over my previous build
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Old 30th December 2010, 06:40 PM   #5697
massimo is offline massimo  Italy
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I would prefer to give chance to a dedicated first stage low Z active noise filter on the rail ....
Are you thinking about a cap multiplier similar to the one used in the Paerl phonostage?
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Old 30th December 2010, 07:21 PM   #5698
Salas is offline Salas  Greece
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Its not satisfactory for Zo. Maybe to cascade 2 Sziklai buffers.
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Old 30th December 2010, 07:59 PM   #5699
nicoch58 is offline nicoch58  Europe
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Old 30th December 2010, 09:10 PM   #5700
SGregory is offline SGregory  United States
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You could use wool felt to set up the RIAA and control noise
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