THE OUTPUT STAGE OF THE OPAMP
|Hold on a minute. Now we are talking about output stage? That's a completely different circuitry. I thought the discussion about discrete vs. monolithic was purely on opamp itself and has nothing to do with the output stage
The part that CAN NOT be made into class-A operation no matter how bad many wish it to be so.Not possible,can not happen get over it and accept reality.No matter what you hang on the output you will still have a Class A/B or class B output stage on the output of the actual chip itself and this WILL have an impact on the sonics *
|opamp is not designed to have the output stage you want to have in audio applications. You can add additional circuitry to the opamp to make it do class A or whatever but from an engineering point of view this is obvious inferior to designing an opamp that does exactly what you want in the first place.
no you can NOT add circuitry to "make it do class A".You can make the output Class-a TO A POINT then it switches back to AB for the rest of the signal or IT W
ILL burn up the output stage transistors of the opamp and once they go thermal runaway takes out the rest instantly
At best you get 5mA to 7mA of class A from an opamp capable of 50 mA output current so that is FULLY 45mA of AB or less than 10% of the output in class A bias.
|it is like making an opamp of your own, except you realize it not using silicon fabrication technology in a clean room on a wafer but with individial discrete transistors on a PCB. However, If a manufacturer such as AD or TI is willing to design an opamp for us, such as turning a discrete opamp design in audio amplifier to a monolithic chip then we can compare the two, here you maybe able to see the advantage of having laser trimmed transistors on silicon
are you arguing a point just to do it ? It is totally obvious you have no clue even though I broke it down into plain non technical language so you are not understanding the obvious or you are intentionally being obtuse for whatever reason.
Again for the cheap seats.......................
YOU CAN NOT HAVE A CLASS-A OUTPUT I.C. OP-AMP !
there are none and there will BE none made in your lifetime.Deal with it
|I don't think the comparison is 100% valid, maybe 97%.
100% correct,100% valid,100% undiluted Rick
don't come to a gunfight with a gunslinger armed with a stick man.Not a good move
The * from above : see followup post coming right up