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Old 11th December 2004, 10:07 PM   #1
GEirin is offline GEirin  Argentina
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Default No Miller cap, Double bootstrapping amp.

Hi all.
I´m new in this forum and is my 1º post.
In 1988, i build my 3º amplifier (50W). The amplifier is class B, had differential input, no Miller cap, double bootstrapping and quasi-complementary design.
I want to build a newer amplifier, or no.
My questions
1º, What is your think about the attached schematic amplifier.
2º, I modify my amplifier, or build a new amplifier ( P3A.......)
I need your help.
Thanks
Guillermo Eirin
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Old 12th December 2004, 01:34 AM   #2
GEirin is offline GEirin  Argentina
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Sorry.
My schematic amplifier.
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File Type: zip mi50w.zip (30.8 KB, 365 views)
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Old 15th December 2004, 11:28 AM   #3
thanh is offline thanh  Viet Nam
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hi! what's is the function of R2 C2?
and R13 R11 C7?
and R24 R17 T5 T6 T7 T8
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Old 15th December 2004, 12:27 PM   #4
MikeB is offline MikeB  Germany
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Quote:
Originally posted by GEirin
Sorry.
My schematic amplifier.
Hmm, i have no word for windows...
Can you upload grafix ?
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Old 15th December 2004, 12:38 PM   #5
thanh is offline thanh  Viet Nam
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png file
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File Type: png nocapa.png (33.5 KB, 1195 views)
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Old 15th December 2004, 12:47 PM   #6
MikeB is offline MikeB  Germany
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thanx Thanh !

R2/C2 is a classical RC, in my opinion the better alternative for
feedbackcompensation than cdoms.

Mike
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Old 15th December 2004, 12:52 PM   #7
thanh is offline thanh  Viet Nam
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really?
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Old 15th December 2004, 12:54 PM   #8
MikeB is offline MikeB  Germany
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Yes ! (For me)

My latest amp uses these, i am very happy with it.

FYI:
http://www.diyaudio.com/forums/showt...188#post501188
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Old 15th December 2004, 01:13 PM   #9
MikeB is offline MikeB  Germany
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Hi GEirin !

Why do you want to build new one ?
Do you have some specs about yours ?
How does it sound ?

Mike
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Old 17th December 2004, 12:40 AM   #10
thanh is offline thanh  Viet Nam
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mikeb! in computer ,my amp is stable with 100p from vas to -input but in real world my amp always ocssilates .i also use your method ,200p without resistor and the result isn't also better
in simulator , no use miler capacitor is intersting for me
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