A couple years back someone posted a reference to what I think was called the Widlar super follower? I recall something like 3 NPN bjts - basically a long tail pair diff amp with emitter follower but I think there was something more to it than just that?
Widlar super follower
Sep 02, 2026
Last reply: 3 hours ago
7 Replies
Gerhard Hoffman was evaluating this topology in LTspice a few years back, so search his posts.
Am 02.09.26 um 23:08 schrieb JM:
Hoffmann with 2 n, pleaze :-)
probabbly this here: <
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>
cheers, Gerhard
Or you could buy an opamp.
I like BUF602, a fast active follower.
What is D1 for?
Am 03.09.26 um 01:34 schrieb john larkin:
compensating the Q3 BE-drop?
Yes I should have remembered that from my time in Vienna. I remember scratching my head when told that a mann is a man, but a man can be a woman, or a man, or a mixed group. And a mann is also a husband - can't remember what a wife is called.
Just as well I'm not still there, I took a liking to Brühwurst and started working my way through all (800?) varieties. I would be like Mr Creosote had I stayed.
Probably. I've seen that type of thing often enough in high temperature (upto circa 200C) downhole tools.
But the low end is a current sink!
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