🙂😎
Maybe another explanation into why a C across the FB resistor to a (-) base (VFB circuit) and to an emitter (CFB) does the opposites. Could be another helpful insight or view.
-THx-RNMarsh
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How many days more will be discussed 1 poor transistor and 2 feedback resistors before the topic goes to tits? 😀
we can go back to boobs any time --- I get pictures all the time of boobs and more on facebook from women looking for a man to give them money and support. Go to facebook.
-RM
Well, actually, there is a bit more to it than that. Once you understand the role that the impedance of the feedback network plays in frequency compensating the amplifier it is no longer baffling that the established term "current feedback" has been chosen to purposefully distinguish this topology.
I honestly do no know what any discussion on the merits of the established nomenclature that either skips past or fails to grasp this fundamental aspect brings to the table, aside from circular repetition.
I am always there, but seldom get such requests. May be I looks for hem as if would not give any money? 😀
Well, we are not discussing "IC only here"?
"Monster implementation" yes, true, leads to great voltage noise figures.
I agree, an easier way is to use a complementary JFet input, spares a complementary BJT pair because no diamond is needed, and the inverting input would just be at the JFet source (in a similar way as the F5 from Pass). Perfect for MM cartridges, for MC you'll need paralleling.
(Btw, I think a power amp with 80 BJT is also a monster implementation with not much advantages over simpler designs....)
Gee, there it is. A different circuit topology. And back in the days, someone gave a (err....arguably...) wrong name.
Now we use that denomination and everyone knows what it's meant.
Isn't that a great thing?
Whatever the topology, with increasing frequency, a primary effect of the usual compensation is to increase the potential difference between the non-inverting input and inverting input of the sensing device which controls the feedback loop.
Honestly, the "established nomenclature" of Current Feedback as a topology should be revised or at least, students and beginners in electronics should be seriously warned against its incoherence.
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This is what I continue to say over and over...... and there exists literature and books on the subject which explains the differences. Why bother with anyone's opinion here?
View attachment 1A.pdf
View attachment 1B.pdf
🙂 😎
-RNM
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As it is with electric current.The conventional direction is from + to - ,
but the electron flow is from - to +.
Mona