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Transconductance Amplifier (OTA) for Estats?


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Hello,

 

I dont have a great grasp of these topics so if I have some fairly base misunderstandings or bad assumptions let me know. Now onto the question.

 

My understanding is that estats behave pretty predominantly as a capacitive load. If this is the case it would seem to me that a transconductance amp (that has not be rectified to voltage drive output/aka a 'current drive' amp) would be a fairly ideal way to run estats. Are there any amps that do this? is this how all estat amps do it and I am just not aware? If not, what are the reasons that we dont use an OTA output stage given basically all TOTL estat amps have a solid state output stage (only exception being viva stx afaik)?

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