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Old 28th October 2009, 08:52 AM   #31
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Quote:
Originally Posted by Bonsai View Post
"by the thread title you'd be better off pursuing cascodes:

REDUCTION OF TRANSISTOR SLOPE DISTORTION IN LARGE SIGNAL AMPLIFIERS, M.O.J. Hawksford, JAES, vol.36, no.4, pp.213-222, April 1988

http://www.essex.ac.uk/csee/research...%20cascode.pdf "


This is the VAS technique I was refering to in my earlier post on this thread.

Using the simple standard current amplifier topology front end, but modding the VAS stage to use Hawksfords technique, I consistently get THD (simmed) below 500ppb. Between the VAS and the load, I'm using a diamond buffer. Hawksfords VAS is really amazing in my view. This weekend, I plan to mod my power current power amp VAS to Hawksford (I was supposed to do it a few weeks ago, but have not had time).
Thank you for this advices. here the right link:
1) http://www.essex.ac.uk/csee/research...%20cascode.pdf
If don't goes open please copy this in the URL address field and add the correct characters at the beginning and at the end as a substitute for the wrong
2) http_www_essex.ac.uk/csee/research/audio_lab/malcolmspubdocs/J10%20Enhanced%20cascode_pdf
then the URL will no longer be mutilated further through this forum
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Old 10th November 2009, 03:54 PM   #32
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on this thread I read about some application notes from Motorola.
AN-483B (post #5 could be exactly the version, that I ask
Anybody have scan of AN-483B (Motorola)?
But I am not absolutely shure.
Perhaps one of you can post this exemplare - I don't find it online.
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Old 10th November 2009, 06:15 PM   #33
mlloyd1 is offline mlloyd1  United States
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tiefbassuebertr,

just curious - were you ever able to find the original paper from lender?

mlloyd1
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Old 10th November 2009, 06:29 PM   #34
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Quote:
Originally Posted by mlloyd1 View Post
tiefbassuebertr,
just curious - were you ever able to find the original paper from lender?
mlloyd1
No - therefore I have started this thread. Please read post #1. If I had found the original paper, I wouldn't post here.

Last edited by tiefbassuebertr; 10th November 2009 at 06:31 PM.
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Old 10th November 2009, 09:42 PM   #35
forr is offline forr  France
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I only met Lender's name mentionned by Boberly and Self.
In all the editions of Self's book on power amps, the Lender's circuit shown seems to have wrong values of resistors.
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Old 10th November 2009, 11:04 PM   #36
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His name is spelled:

http://www.borbelyaudio.com/

His 1982 Audio Amateur EB60 amplifier has the Lender circuit explained.
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Last edited by djk; 10th November 2009 at 11:12 PM.
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Old 13th May 2012, 09:33 AM   #37
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Quote:
Originally Posted by djk View Post
His name is spelled:

Audio | Digital Voice Recorder | Bose Wave Radio | Editor | Speaker Jbl at Borbelyaudio.com

His 1982 Audio Amateur EB60 amplifier has the Lender circuit explained.
This article I have in the associated book about
Audio Amateur Power Amp Projects - Circuit Cellar, Inc.
or
Audio Amateur Power Amp Projects | CE Distribution LLC
This article has prompted me to start this thread nearly three years ago.
I need the by post #1 mentioned genuine paper from Motorola
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Old 14th May 2012, 12:53 AM   #38
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Sorry, I remember reading it, but don't have a copy.
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Old 6th April 2013, 09:14 AM   #39
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concerning the phono mm mc preamp "SUPRA" I have questions and have posted therefore by this thread (POST #27):
SLN Pre-Amp - Elektor Aug 1982
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Old 6th April 2013, 01:15 PM   #40
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Quote:
Originally Posted by tiefbassuebertr View Post
The most linear stage for large voltage swings - Lender's Circuit...
There is no evidence anywhere that this is true.
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