Svart
Well-known member
glad to see you around again TK. I've been steadily using up my FET blokes on just about everything these days.. almost time for a refill!
Hm, is there really a serious stability difference? There should only be a minor difference, as with this topology stability/loop gain is essentially given by feedback resistor value, collector junction capacity and perhaps output loading. Transconductance of the input transistor (and hence BJT vs. FET) is almost irrelevant, at least at low gains where stability is of most concern.I prefer the FET input versions almost always for stability reasons.
Hm, is there really a serious stability difference? There should only be a minor difference, as with this topology stability/loop gain is essentially given by feedback resistor value, collector junction capacity and perhaps output loading. Transconductance of the input transistor (and hence BJT vs. FET) is almost irrelevant, at least at low gains where stability is of most concern.I prefer the FET input versions almost always for stability reasons.
For differential inputs yes, but here we have a single-ended current-feedback input.While perhaps not stability per se that kind of agrees with my recollection of the basic difference between FET and Bipolar inputs. i.e. the lower transconductance of FETs allow higher slew rate under similar conditions due to reduced dominant pole compensation requirements.
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