Maybe, but amplifiers bursting in oscillations and self destructing under difficult loads is unfortunately a very old and familiar tune.
With all due respect, Richard doesn’t have the foggiest idea what he is talking about, as long as he suggested replacing the vertical mosfets with lateral mosfets, just like that.
Tournesol
Opamps PSU must be floating at otput of power stage. Other way it can not work as intended. No, no and no 🙂
Opamps PSU must be floating at otput of power stage. Other way it can not work as intended. No, no and no 🙂
Ed, that's discussed in Cordell's book. Figure 10.3 (p.221) of the 2nd edition.
Only willing to pay for the first one!
I have shown that approach to well regarded folks who were quite confused!
Napoleon said a little schematic says more than thousands words.
Just the idea. No free lunch, of course, but nothing impossible with a spirit of sacrifice ;-).
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Nothing turns up (any link?), but this reminds me of the emitter driven EC proposed by Barry Blesser circa 1972. He only had NPN's at his disposal at the time but with both flavors I drew a little family chart that led to an interesting EC scheme. Jcx pointed out that this was in a Pass Labs patent years later reinforcing the thought that nothing is new.
Might have been some revisions, but here was the original article IIRC.
ExtremA, a reference class-A DIY amplifier. - Copyrights, Updates etc.
I am sure you will lie to yourself several times in the first week of next January.
Just make a complete working circuit in LTSpice , with resistors, opamps, a voltage source injecting the distortion and your suggested error correction, all as close as possible to a real situation.
You are attenuating the input signal of the OPS by 10%, it might work that way.
First try to find out what the simulation tells.
Hans
These are Christmas sales.
As I told, there is no free lunch. You will told me too than an OPA do not have 0 Ohm of output impedance etc.
Not my way to work.
I have several ideas about the "mix" stage. Don't make the mistake of SYN08 to confuse a charcoal and the final painting exhibited at the Guggenheim museum ;-)
Seems about right, afraid they are too late. There is a principle known as obvious to those skilled in the art.
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Often also used in discrete small signal amplifiers - a classic being the 3 or 4 transistor RIAA preamp
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Might be that higher output L drops the resonant frequency of the load C and that may be audible to some but I have not done enough work on the audibility side to have an opinion either way. I do know when you sim it, or look at it in practice, there’s a lot of ringing going on so high L should be avoided. I’ve seen designs with 5uH.
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I don't recall Bruno ever saying it was novel. There was a longish thread on this a while back.
For those it may interest, Sander presented his amp on DiyA also under the following link.
ExtremA, class-A strikes back?
Yeah, I'm always confused by such complicated names as Guge...Gugh... Gagh...
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