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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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(PDF) 2N3456 Datasheet download

By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. In fact, in this case the opamp output current is ideally 0. Sign up using Email and Password.

Sign up or log in Sign up using Google. Both of the example circuits are old; the 2N transistor is a metal-case unit no longer easily available. The old solutions still work!

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2N3456 – N-CHANNEL SILICON JUNCTION FIELD-EFFECT

Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that datasyeet continued use of the website is subject to these policies. Home Questions Tags Users Unanswered. If the opamp is powered datasueet that its output can swing to 12 V or so, then just a single modern MOSFET would suffice, even for very large currents.

That’s what makes it a “precision” current source. Note that the LM is very old. 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.

`i tPioducti, fine. 2N N

By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.

Email Required, but never shown. Whit3rd 4, 10 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.

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The size of the silicon slab used was very limited. Sign up using Facebook. Null 4, 10 22 The important point here is that all the current goes thru R1. However, you’d need to be careful about the gate capacitance causing stability problems.

There is no error due to base current.

Probably updating solutions is not a business priority. 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.

Why — was it an electrical limitation or cost or something else?