Kirkus: Nice post. Accurate and true to practice. One point of interest - distortion is a consideration for all type of signal processing. I spent decades designing signal acuisition and processing circuits for medical research applications. Negative feedback is employed in every discrete application that I saw or worked with - clinical as well as research. Although an amateur radio operator for decades and an electrical engineer by education and occupation for decades, I never encountered the "bad bad negative feedback" argument until I started looking around audiophile websites. Kind of wonder where the better theory is, huh? Thanks for the information as to the origin of this myth in audiophile circles. Also nice cite to Self's book
What is wrong with negative feedback?
I am not talking about the kind you get as a flaky seller, but as used in amplifier design. It just seems to me that a lot of amp designs advertise "zero negative feedback" as a selling point.
As I understand, NFB is a loop taken from the amplifier output and fed back into the input to keep the amp stable. This sounds like it should be a good thing. So what are the negative trade-offs involved, if any?
As I understand, NFB is a loop taken from the amplifier output and fed back into the input to keep the amp stable. This sounds like it should be a good thing. So what are the negative trade-offs involved, if any?