Groups > sci.electronics.components > #6479

Re: 2N3819 JFET spice model

From	Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>
Newsgroups	sci.electronics.components
Subject	Re: 2N3819 JFET spice model
Date	2022-04-07 16:30 -0400
Organization	A noiseless patient Spider
Message-ID	<443e7cd9-7629-f2c2-017d-fcdeddf7ea3a@electrooptical.net> (permalink)
References	<357FD5CA.794B@lapp.in2p3.fr> <d17faaaf-fd34-45f8-9440-a9222f7242a2n@googlegroups.com> <j4893hd7mgj7ap7di7gf34sgotaaklaeto@4ax.com> <8ea114da-661e-405f-b96a-3a371d063c76@electrooptical.net> <5on3ii-re303.ln1@coop.radagast.org>

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Dave Platt wrote:
> In article <8ea114da-661e-405f-b96a-3a371d063c76@electrooptical.net>,
> Phil Hobbs  <pcdhSpamMeSenseless@electrooptical.net> wrote:
> 
>>> 2N3819 was always poorly defined w/r data sheet.
>>> Many vendors, many wafers, many processes were used.
>>
>> Wow, that's an amazingly crappy part, even for a JFET.
>>
>> The Fairchild datasheet shows a 15:1 range of pinchoff voltages, and
>> that's from just one vendor.
> 
> I've always thought of 2N3819 as the JFET analog of the 2N3055 BJT.
> It's a convenient part number into which you can reasonably throw a
> whole lot of different JFET products.  Test what you fab, and if they
> don't meet tighter specs for a targeted part number, just call them
> 2N3819.
> 

They must have made them in saucepans.  Actual _good_ JFETs, such as the 
CPH3910, have much much tighter specs (and much lower noise).

Cheers

Phil Hobbs
"40,000 of them in stock"

-- 
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com

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Thread

Re: 2N3819 JFET spice model jrg lbt <jrglbt09@gmail.com> - 2022-02-26 11:14 -0800
  Re: 2N3819 JFET spice model legg <legg@nospam.magma.ca> - 2022-03-01 13:50 -0500
    Re: 2N3819 JFET spice model Andrea Croci <andrea.croci@gmx.de> - 2022-03-03 18:10 +0100
  Re: 2N3819 JFET spice model legg <legg@nospam.magma.ca> - 2022-03-18 11:13 -0400
    Re: 2N3819 JFET spice model Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2022-04-07 10:29 -0400
    Re: 2N3819 JFET spice model Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2022-04-07 11:48 -0400
      Re: 2N3819 JFET spice model dplatt@coop.radagast.org (Dave Platt) - 2022-04-07 11:39 -0700
        Re: 2N3819 JFET spice model Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2022-04-07 16:30 -0400
          Re: 2N3819 JFET spice model "jfeng@my-deja.com" <jf0303222@gmail.com> - 2022-04-07 13:45 -0700
            Re: 2N3819 JFET spice model Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2022-04-11 13:30 -0400
              Re: 2N3819 JFET spice model legg <legg@nospam.magma.ca> - 2022-04-11 16:21 -0400
              Re: 2N3819 JFET spice model "jfeng@my-deja.com" <jf0303222@gmail.com> - 2022-04-11 19:57 -0700

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