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tech / sci.electronics.design / Re: Commercially available jumctionless transistor

SubjectAuthor
* Commercially available jumctionless transistoramal banerjee
+* Re: Commercially available jumctionless transistorPhil Hobbs
|`* Re: Commercially available jumctionless transistorPiotr Wyderski
| `- Re: Commercially available jumctionless transistorRich S
`* Re: Commercially available jumctionless transistorwhit3rd
 `- Re: Commercially available jumctionless transistorJohn Walliker

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Commercially available jumctionless transistor

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Subject: Commercially available jumctionless transistor
From: dakup...@gmail.com (amal banerjee)
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 by: amal banerjee - Fri, 27 May 2022 11:15 UTC

All you electronics|semiconductor gurus here. Any commercially available
junctionless transistors ? Kist curious .

Re: Commercially available jumctionless transistor

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From: pcdhSpam...@electrooptical.net (Phil Hobbs)
Newsgroups: sci.electronics.design
Subject: Re: Commercially available jumctionless transistor
Date: Fri, 27 May 2022 11:28:26 -0400
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 by: Phil Hobbs - Fri, 27 May 2022 15:28 UTC

amal banerjee wrote:
> All you electronics|semiconductor gurus here. Any commercially available
> junctionless transistors ? Kist curious .
>

Well, ISTM that ideally a lateral MOSFET could be made without a junction.

Cheers

Phil Hobbs

--
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

Re: Commercially available jumctionless transistor

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From: bomb...@protonmail.com (Piotr Wyderski)
Newsgroups: sci.electronics.design
Subject: Re: Commercially available jumctionless transistor
Date: Fri, 27 May 2022 18:22:57 +0200
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 by: Piotr Wyderski - Fri, 27 May 2022 16:22 UTC

Phil Hobbs wrote:

>> All you electronics|semiconductor gurus here. Any commercially available
>> junctionless transistors ? Kist curious .
>>
>
> Well, ISTM that ideally a lateral MOSFET could be made without a junction.

Is the OP asking about native MOSFETs? Then EPADs might be a decent
approximation, some still available at Mouser/Digikey. Another option
would connecting a BC547 directly to mains to make it truly,
Sevres-certified junctionless, but something tells me it's not the case.

Best reagds, Piotr

Re: Commercially available jumctionless transistor

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Subject: Re: Commercially available jumctionless transistor
From: whit...@gmail.com (whit3rd)
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 by: whit3rd - Fri, 27 May 2022 18:08 UTC

On Friday, May 27, 2022 at 4:15:08 AM UTC-7, daku...@gmail.com wrote:
> All you electronics|semiconductor gurus here. Any commercially available
> junctionless transistors ? Kist curious .

The traditional way to implement transresistance without a junction is
with a triode vacuum tube. Plain old bipolar junction transistors
are the high-gain winners nowadays, and MOSFETs are the high-density
winners. What design win can a junctionless transistor achieve?
None, that I know of.

It's likely to remain a lab curiosity for a few more decades.

Re: Commercially available jumctionless transistor

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Subject: Re: Commercially available jumctionless transistor
From: jrwalli...@gmail.com (John Walliker)
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 by: John Walliker - Fri, 27 May 2022 19:30 UTC

On Friday, 27 May 2022 at 19:08:15 UTC+1, whit3rd wrote:
> On Friday, May 27, 2022 at 4:15:08 AM UTC-7, daku...@gmail.com wrote:
> > All you electronics|semiconductor gurus here. Any commercially available
> > junctionless transistors ? Kist curious .
> The traditional way to implement transresistance without a junction is
> with a triode vacuum tube. Plain old bipolar junction transistors
> are the high-gain winners nowadays, and MOSFETs are the high-density
> winners. What design win can a junctionless transistor achieve?
> None, that I know of.
>
> It's likely to remain a lab curiosity for a few more decades.

Don;t forget fluid logic gates. They have been around for over a century.
https://en.wikipedia.org/wiki/Fluidics

John

Re: Commercially available jumctionless transistor

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Subject: Re: Commercially available jumctionless transistor
From: richsuli...@gmail.com (Rich S)
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 by: Rich S - Mon, 30 May 2022 23:31 UTC

On Friday, May 27, 2022 at 4:23:17 PM UTC, Piotr Wyderski wrote:
> Phil Hobbs wrote:
>
> >> All you electronics|semiconductor gurus here. Any commercially available
> >> junctionless transistors ? Kist curious .
> >>
> >
> > Well, ISTM that ideally a lateral MOSFET could be made without a junction.
> Is the OP asking about native MOSFETs? Then EPADs might be a decent
> approximation, some still available at Mouser/Digikey. Another option
> would connecting a BC547 directly to mains to make it truly,
> Sevres-certified junctionless, but something tells me it's not the case.
>
> Best reagds, Piotr

In my youth, I (unintentionally) created many
such "junction-less" transistors.

I did not see the value of keeping them....
regards, RS

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