Why rock bottom? because the right topology does that without any effort. And fb will only be needed for stability of operation variables and other issues... there are other parameters beside distortion. But a good compl-sym topology makes it easy to get low distortion thus a good starting point.
What is the best OPS topology for low OPS distortion...... besides biasing ......?
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I find starting cutting the underbelly open first is the best way to skin a cat. Important note for the folks around here, be sure it is dead.
We are doing a mostly vegetable based diet these days. What you describe is repulsive on several levels. If the universe is expanding into nothing I guess the audio world can too.
All that dirts that go to power rails... well... it would work, but can we call it high end?
Simple does not mean elegant, while elegant means simple.
As usual we don't really communicate. BTY the emperor really does not have any clothes.
Let me know the next time you try to pet a tiger.
Well; may be in terms of resulting MTBF and troubleshooting, but who troubleshoots today? Swap a board, that's it!
I used this cheap design first in 1969, and ran a K-horn with it for years. I used it in Class A mode, but it works better and faster than one would expect just glancing at the schematic. I did not design the topology, I am pretty sure that Bob Widlar did it first. I found it in an app. note, using a uA741, I am pretty sure.
Ok JC, why FET's? C. Hansen seem to be fond of symmetric bridged FET amp topologies as well..
It was used in many mediocre PA amps. Also, I saw one hybrid opamp that had inside something like caseless 741 and a pair of transistors. Sooo slooow!
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