As for models for the ECX10N20/P I found: https://www.diyaudio.com/community/threads/ecx10n20-ecx10p20-models.310330/#post-5171278
Going to try those out.
Going to try those out.
The lateral Mosfets have a negative temperature coefficient once they are conducting sufficient bias current. Thus no source resistors are needed.
The early Hafler DH-200 and DH-220 amps used two sets of these in parallel to achieve ca. 200 Watts of power in class A/B operation. Bias current was 275mA with +/- 65V power rails in the DH-220.
The early Hafler DH-200 and DH-220 amps used two sets of these in parallel to achieve ca. 200 Watts of power in class A/B operation. Bias current was 275mA with +/- 65V power rails in the DH-220.
Hi Nico
This is not the first amplifier in my life..... 😎
Drivers must be thermally coupled
I was also thinking of putting them on the heat sink with Laterals
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You dislike op-amps?
Look at this:
https://www.diyaudio.com/community/threads/navajo-16-watt-diamond-with-low-distortion.415953/
This was fun stuff to do when testing
output stages. Just a opamp driving it.
Trying to remember when playing with higher
voltage opamps if I got better results with 552
or just used LM1875 as high voltage opamp.
Unfortunately it would add more transistors
on the keeping it on the simple side.
But if R13/14 are important for bias
and the rails will swing few volts or two under load.
Maybe should be constant current sources for
R15/16 instead set to 10ma. Likely high impedance
could improve THD as well.
output stages. Just a opamp driving it.
Trying to remember when playing with higher
voltage opamps if I got better results with 552
or just used LM1875 as high voltage opamp.
Unfortunately it would add more transistors
on the keeping it on the simple side.
But if R13/14 are important for bias
and the rails will swing few volts or two under load.
Maybe should be constant current sources for
R15/16 instead set to 10ma. Likely high impedance
could improve THD as well.
Not to be negative, but not really.
rather frustrating device to model with.
Unless somebody has something that works
with texas spice / Tina.
The ones that " worked" were difficult and
unstable.
Keep in mind Elliott's opinion highly subjective.
Since Cordells opinion much the opposite.
His Error Correction amplifier with Vertical Mosfets.
Far far exceed Rods simple circuits.
And does so with more favorable behavior of
widely available vertical
Vertical mosfet library one of the best in Tina.
So got over non working unstable lateral models.
Being market availability and price is not great real world.
Unfortunately
rather frustrating device to model with.
Unless somebody has something that works
with texas spice / Tina.
The ones that " worked" were difficult and
unstable.
Keep in mind Elliott's opinion highly subjective.
Since Cordells opinion much the opposite.
His Error Correction amplifier with Vertical Mosfets.
Far far exceed Rods simple circuits.
And does so with more favorable behavior of
widely available vertical
Vertical mosfet library one of the best in Tina.
So got over non working unstable lateral models.
Being market availability and price is not great real world.
Unfortunately
I thought the same thing, bootstraps are fun.
Would need to test in realistic model for stability issues.
Otherwise a good back pocket trick for simple circuits.
hier sind wir richtig
I recently opened a separate thread for this great movie experience - hope I can find and read more about the (esoteric) solutions there.
😉.
I recently opened a separate thread for this great movie experience - hope I can find and read more about the (esoteric) solutions there.
😉.
Using an opamp front end is a fantastic way to incorporate a state of the art voltage amplifier stage with heaps of gain into an amplifier with a minimal parts count. I'm surprised it's not done more often.
I think bootstrap is a good thing.
But in this amplifier there is no need. Just makes it cluttered and complicated.
Warning!!
Don't try this circuit at home.
The PhaseMargin is only 21 Degrees.
Wait until I fix this. Then we can go 🙂
Don't try this circuit at home.
The PhaseMargin is only 21 Degrees.
Wait until I fix this. Then we can go 🙂