has any one done this amplifier, i like single-ended - diyAudio
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Old 18th January 2004, 06:09 AM   #1
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Default has any one done this amplifier, i like single-ended

i think this amplifier is so attractive to me.
it can be built to great power but in single ended mode.
the last mosfet only works at little volt and very big cuurent.
but dissipation will be lower.
is it so good? any one give me some comment,thanks
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Old 18th January 2004, 08:43 AM   #2
hifiZen is offline hifiZen  Canada
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Hmm, this is a novel idea (maybe it's been done before?)... A single ended class-A output device, paired with an interesting dynamic current source, all floating on a class-B stage. Indeed, power dissipation should be significantly reduced from standard SE class-A amps (looks like about 45W idle dissipation for the class-A part, if I read those tiny numbers right). I'm curious how stable it is in practice...
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Old 18th January 2004, 06:56 PM   #3
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Where does the design come from and what does the writing on the diagram mean?

Looks interesting.
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Old 18th January 2004, 07:13 PM   #4
joensd is offline joensd  Germany
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I think I磛e seen the design on these pages.
A lot of interesting and simple mosfet amplifiers.
But my attempt to translate them didn磘 turn out so well.
They have an english guide though.
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Old 18th January 2004, 09:04 PM   #5
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Quote:
Originally posted by Cybergent
Where does the design come from and what does the writing on the diagram mean?

Looks interesting.

I thinkt he original is in japanese but with lots of Chinese characteristics.

the first row says, from left to right: Voltage amplifier / stage, current amplifier / stage;

the 2nd row says, from left to right: first stage; 2nd stage; the next two stages I don't know how to translate; and then output stage;

thee 3rd row says, from left to right: constant current source.
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Old 18th January 2004, 10:59 PM   #6
Steven is offline Steven  Netherlands
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It's a single ended version of a patent owned by Nelson Pass, 5343166. See first page below. Item 33 is the floating current source.

Steven
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Old 19th January 2004, 06:43 AM   #7
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Default haha.

i found all sch i like also belongs to Mr. pass.
Mr. pass is a great thaumaturgist in the amplifier designers.
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Old 19th January 2004, 07:36 AM   #8
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Default who knows

which commercial amplifier Mr. pass designed used this patent #5343166?
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Old 19th January 2004, 08:43 AM   #9
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I believe he said he has not used that in 17? years or something because he did not like the sound compared to a true class A
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