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Re: What happens when there is no negative feedback, A subjective perspective.

Of course, cathode, fet, or bipolar followers would have a low enough impedance to easily drive an INPUT TRANSFORMER. But I don't normally use input transformers, so why design followers into the design, if you can get away with just a resistive load? It has been found that followers can be problematic, in that they can ring and oscillate with difficult loads. I once built a line driver for the Grateful Dead sound system. I avoided followers for this very reason. I used transconductance amps instead, which, even with negative feedback, can drive difficult loads more easily. The only place where I find followers mandatory is with power amps, BECAUSE they spit back EMF from the loudspeakers, and can create IIM distortion.

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