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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There is no error due to base current.
2N3456 – N-CHANNEL SILICON JUNCTION FIELD-EFFECT
However, you’d need to be careful about the gate capacitance causing stability problems. 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.
Datasheet 4, 10 22 Sign up using Facebook. The point of datadheet 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.
(PDF) 2N Datasheet PDF Download – TRANS JFET N-CH 3TO
2N_PDF Datasheet Download IC-ON-LINE
The old solutions still work! That’s what makes it a “precision” current source. Note that the LM is very old.
Sign up or log in Sign up using Google. Probably updating solutions is not a business priority. In fact, in this case the opamp datasehet current is ideally 0.
Post as a guest Name. Why — was it an electrical limitation or cost or something else? Both of the example circuits are old; the 2N transistor is a metal-case unit no longer easily available.
If the opamp is powered so that its output can swing to 12 V or so, then just a single modern MOSFET would suffice, even for very large currents. The important point here is that all the current goes thru R1.