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#1 |
diyAudio Member
Join Date: Apr 2002
Location: Prague
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Inspired by NP in a "Hawksford" thread, I have developed a new error correction circuit. The schematic of working amp is attached. I have been testing it for more than a month (both measuring and listening) and results seem to be promising.
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#2 |
diyAudio Member
Join Date: Aug 2003
Location: Prague,Czech Republic
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Guys, this amp sound very well
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#3 |
diyAudio Moderator Emeritus
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I really wanted to understand how an "Error Correction" works. It gives good sound (even we do not listen in Prague).
I havent understand about Hawksford type, then PMA gives another topology. This topology has no bias adjustment. In the prototype, the swing is limited to opamp's supply? Which topology has the lowest voltage rail inefficiency? Etalon type has R to ground to set the input impedance. |
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#4 |
diyAudio Member
Join Date: Jan 2002
Location: The Netherlands
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please could you explain in more detail.
Already checked your website but found no article ![]() grtz Simon |
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#5 | |
diyAudio Member
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Quote:
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Justice for Victims of Agent Orange http://www.petitiononline.com/AOVN/Thank all of you! |
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#6 |
The one and only
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That's a very cool circuit.
![]() I suppose you could consider dropping diodes 1 - 4. |
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#7 | |
diyAudio Member
Join Date: Apr 2002
Location: Prague
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Quote:
Anyway - good idea ![]() ![]() |
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#8 |
diyAudio Member
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Ummm...
Sorry if this sounds crude but in this schematic I see just an exotic error amplifier with high open loop gain that uses classic feedback to linearize the output transfer characteristic dividing the error by the feedback amount So using a standard LTP and VAS would do exactly the same job I think, but in a less fashionable way Any amplifier with global feedback is just an 'error correction' amplifier |
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#9 |
diyAudio Member
Join Date: Aug 2003
Location: Prague,Czech Republic
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Eva, pleas read little bit more about error correction at Hawksford's pages
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#10 | |
diyAudio Member
Join Date: Apr 2002
Location: Prague
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Quote:
The circuit in principle was invented by Nelson and was inspired by Nelson's hand drawn image (see attachement). It is an ingenious mix of negative error-correction feedback (left half) and smoothing positive feedback (right half). The right half is responsible for smooth turn-on and turn-off of the output devices, as can be seen on my web page (measurement well corresponds to simulated image). |
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Thread | Thread Starter | Forum | Replies | Last Post |
Re: New error correction amp | mefistofelez | Solid State | 12 | 7th October 2010 07:55 AM |
error correction et al' | sq225917 | Digital Source | 4 | 7th August 2007 11:16 AM |
Will this work as Error Correction? | lumanauw | Solid State | 4 | 8th October 2004 11:52 AM |
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