2N datasheet 2N component 2N integrated circuit 2N schematic 2N application note N 2N 2N34 2N3. 2N Description = Low Power Field Effect Transistor ;; Case Style = TO18 ;; Geometry = FN ;; Page Number = E28+E Page 1. This datasheet has been downloaded from at this page. Page 2.
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2N3456 – N-CHANNEL SILICON JUNCTION FIELD-EFFECT
2N Datasheet(PDF) – New Jersey Semi-Conductor Products, Inc.
The size of the silicon slab used was very limited. The important point here is that all the current goes thru R1. Email Required, but never shown. Post as a guest Name. Home Questions Tags Users Unanswered.
(PDF) 2N3456 Datasheet download
Datashheet up or log in Sign up using Google. I understand that the 2N JFET is there to remove the beta error caused by connecting the BJT base directly to the op amp output as in this circuit. The point of the FET and NPN transistors is to provide current gain so that the output current can be a lot more than the opamp output can provide.
I can sort of understand why TI wouldn’t bother updating an old app note, but I find it strange that LT wouldn’t update one of its “solutions” on its website. Sign up using Facebook.
Both of the example circuits are old; the 2N transistor is a metal-case unit no longer easily available. In fact, in this case the opamp output current is ideally 0. That’s what makes it a “precision” current source.
2N_PDF Datasheet Download IC-ON-LINE
There is no error due to base current. Note that the LM is very old.