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elf best amplifier (mosfet)
elf best amplifier (mosfet)
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Old 12th February 2018, 07:50 AM   #1
Veysel is offline Veysel  Turkey
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Default elf best amplifier (mosfet)

high psrr
high slew
high snr
low thd
Most clear sound.
simple
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Last edited by Veysel; 12th February 2018 at 09:06 AM.
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Old 12th February 2018, 10:00 PM   #2
MAAC0 is offline MAAC0  Portugal
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What a Spaghetti mess. Hope it works.
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Old 12th February 2018, 10:53 PM   #3
globalplayer is offline globalplayer  Germany
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Surely looks interesting.
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Old 12th February 2018, 11:23 PM   #4
mk57 is offline mk57  United States
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One mans mess is another mans treasure....looks like my builds.. looks bad sounds great!!
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Old 12th February 2018, 11:49 PM   #5
adason is offline adason  United States
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Nice circuit
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Old 13th February 2018, 12:32 AM   #6
suzyj is offline suzyj  Australia
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Like the three stage goodness. What’s the OLG? I’d imagine that’s capable of 100dB. Surprised your implementation isn’t oscillating though, as there’s rather a lot of random parasitic there.
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Old 13th February 2018, 07:50 AM   #7
Veysel is offline Veysel  Turkey
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No problem , no oscillate, very stable.
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Old 13th February 2018, 08:29 AM   #8
juma is offline juma  Germany
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Emitter followers are not really needed between input LTP and VAS but they will improve the amp significantly if used between VAS and output HEXFETs.

Also, one small MOSFET (f.e. IRF610) will do better job as temp. comp. device than two BJTs. Vgs multiplier is needed here, not Vbe - ouput devices are MOSFETs so it's advantageous to use the same behaving device for thermal control.
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Old 13th February 2018, 12:47 PM   #9
janusz is offline janusz  Australia
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Looks like a mixture of eti5000 and playmaster.

ETI5000 attached. Note that 18V zener must be inserted between collectors of Q5 and Q7 - the original pdf image. That notably reduces temperature of associated transistors.

cheers,
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Old 13th February 2018, 10:21 PM   #10
suzyj is offline suzyj  Australia
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Thought it looked familiar.
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