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Baxandall Super Pair
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Old 11th July 2012, 07:44 PM   #101
WaltJ is offline WaltJ  United States
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Originally Posted by Edmond Stuart View Post
Hi Walt,

If time permits, you also might have a look at my website for more information about the 'Super TIS'.


The double diff pair in itself isn't new, having been used since the late 60's/early 70's. Or ask John Curl. See a summary of some references on it, within my Duncan/Self power amp book review.

Using the B-S circuit as a current mirror also isn't new. See Fig. 3 within reference 11, i.e., "In #11 the Thompson composite complementary pair is used in Figures 3 and 4 as a current mirror employing 2N3904/3906 discrete transistors."

I don't mean to sound critical here, but you asked if I'd seen this circuit. Just pieces, as noted. Overall it looks like a fascinating circuit, but as it seems, validated thus far via SPICE. Is this correct?

Walt Jung
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Old 11th July 2012, 08:06 PM   #102
Edmond Stuart is offline Edmond Stuart  Netherlands
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Hi Walt,

You are right, all the pieces, in its own right, aren't new. The only thing that is probably new is the combination (and application) of these pieces, in particular with TMC.

>validated thus far via SPICE
That's correct. At the moment I'm busy with gathering components and PCB artwork. I hope it does work in real life as well.
Thank for comments.


Last edited by Edmond Stuart; 11th July 2012 at 08:10 PM.
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Old 11th September 2012, 04:04 PM   #103
WaltJ is offline WaltJ  United States
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Default Boxall, Larson, Baxandall-Shallow, and Thompson Constant Current Circuits

Readers should carefully note the correction of the Baxandall-Shallow authors. I am attaching an updated PDF, which corrects post #87, which erroneously refers to them as "Baxandall-Swallow".

I regret any confusion this may have caused.

Walt Jung
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File Type: pdf Boxall_rev7_Shallow_Corr.pdf (113.1 KB, 398 views)
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Old 12th September 2012, 07:05 AM   #104
tiefbassuebertr is offline tiefbassuebertr  Germany
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in this case this URLs also of interest:
The "Starved-Circuit" Amplifier Is Revived In A Transistor Version
Compound vs Darlington
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File Type: gif Sziklai Straved Circuit Figure_01.gif (11.4 KB, 719 views)
Attached Files
File Type: pdf sziklai_cv.pdf (7.8 KB, 181 views)
File Type: pdf Sziklai www.tunerlux.com Insida_f^rdig.pdf (26.3 KB, 176 views)

Last edited by tiefbassuebertr; 12th September 2012 at 07:10 AM.
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Old 12th September 2012, 10:40 AM   #105
homemodder is offline homemodder  Portugal
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Tief I fail to see what sziklai has to to with super pair.
The CCS amp is interesting, know the patent and the author ?? I ask because Ive seen that circuit published in public and wondering if its the same author.
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