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Groups > sci.electronics.design > #447619 > unrolled thread

gumdrop source

Started byJohn Larkin <jjlarkin@highlandtechnology.com>
First post2017-02-13 22:02 -0800
Last post2017-02-16 12:10 -0500
Articles 20 on this page of 26 — 14 participants

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Contents

  gumdrop source John Larkin <jjlarkin@highlandtechnology.com> - 2017-02-13 22:02 -0800
    Re: gumdrop source Winfield Hill <hill@rowland.harvard.edu> - 2017-02-14 04:15 -0800
      Re: gumdrop source Jeroen Belleman <jeroen@nospam.please> - 2017-02-14 13:43 +0100
        Re: gumdrop source Tim Wescott <tim@seemywebsite.com> - 2017-02-14 09:57 -0600
          Re: gumdrop source John Larkin <jjlarkin@highlandtechnology.com> - 2017-02-14 08:11 -0800
          Re: gumdrop source Robert Latest <boblatest@yahoo.com> - 2017-02-18 10:14 +0000
        Re: gumdrop source Robert Latest <boblatest@yahoo.com> - 2017-02-18 09:57 +0000
          Re: gumdrop source krw@notreal.com - 2017-02-18 10:18 -0500
      Re: gumdrop source John Larkin <jjlarkin@highlandtechnology.com> - 2017-02-14 08:01 -0800
        Re: gumdrop source Winfield Hill <hill@rowland.harvard.edu> - 2017-02-14 08:06 -0800
        Re: gumdrop source Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-02-13 18:20 -0500
          Re: gumdrop source John Larkin <jjlarkin@highlandtechnology.com> - 2017-02-14 09:07 -0800
      Re: gumdrop source Robert Latest <boblatest@yahoo.com> - 2017-02-18 10:18 +0000
        Re: gumdrop source Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-02-17 22:50 -0500
          Re: gumdrop source Winfield Hill <hill@rowland.harvard.edu> - 2017-02-18 09:43 -0800
            Re: gumdrop source Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2017-02-18 13:13 -0500
    Re: gumdrop source bitrex <bitrex@de.lete.earthlink.net> - 2017-02-14 08:44 -0500
    Re: gumdrop source Robert Baer <robertbaer@localnet.com> - 2017-02-15 13:19 -0800
      Re: gumdrop source Clifford Heath <no.spam@please.net> - 2017-02-16 03:54 +1100
      Re: gumdrop source Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-15 13:31 -0800
        Re: gumdrop source John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-02-15 13:46 -0800
          Re: gumdrop source Jeroen Belleman <jeroen@nospam.please> - 2017-02-15 23:04 +0100
            Re: gumdrop source John Devereux <john@devereux.me.uk> - 2017-02-16 05:16 +0000
          Re: gumdrop source tabbypurr@gmail.com - 2017-02-15 14:45 -0800
        Re: gumdrop source Robert Baer <robertbaer@localnet.com> - 2017-02-15 19:59 -0800
          Re: gumdrop source krw@notreal.com - 2017-02-16 12:10 -0500

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#447619 — gumdrop source

FromJohn Larkin <jjlarkin@highlandtechnology.com>
Date2017-02-13 22:02 -0800
Subjectgumdrop source
Message-ID<1475ac58vmcli4c6kchncmk8kdbh8743ev@4ax.com>
http://www.nexperia.com/

The web site is still a tad flakey.


-- 

John Larkin         Highland Technology, Inc

lunatic fringe electronics 

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#447635

FromWinfield Hill <hill@rowland.harvard.edu>
Date2017-02-14 04:15 -0800
Message-ID<o7usdk01s7g@drn.newsguy.com>
In reply to#447619
John Larkin wrote...
>
> http://www.nexperia.com/
>
> The web site is still a tad flakey.

 I see our favorite BF862 low-noise JFET is missing,
 although it still shows at the nxp.com site.


-- 
 Thanks,
    - Win

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#447636

FromJeroen Belleman <jeroen@nospam.please>
Date2017-02-14 13:43 +0100
Message-ID<o7uu2e$juq$1@gioia.aioe.org>
In reply to#447635
On 2017-02-14 13:15, Winfield Hill wrote:
> John Larkin wrote...
>>
>> http://www.nexperia.com/
>>
>> The web site is still a tad flakey.
>
>   I see our favorite BF862 low-noise JFET is missing,
>   although it still shows at the nxp.com site.
>
>

What's with characterizing 'small signal MOSFETs' by
Qg and R_DSon? That's only one example. There are lots
of other inappropriate parametrizations there. I hate
it when they do that. Makes one wonder if they understand
their own products and their clients' interests.

Jeroen Belleman

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#447646

FromTim Wescott <tim@seemywebsite.com>
Date2017-02-14 09:57 -0600
Message-ID<c_adnVIZfJdQtT7FnZ2dnUU7-UOdnZ2d@giganews.com>
In reply to#447636
On Tue, 14 Feb 2017 13:43:59 +0100, Jeroen Belleman wrote:

> On 2017-02-14 13:15, Winfield Hill wrote:
>> John Larkin wrote...
>>>
>>> http://www.nexperia.com/
>>>
>>> The web site is still a tad flakey.
>>
>>   I see our favorite BF862 low-noise JFET is missing,
>>   although it still shows at the nxp.com site.
>>
>>
>>
> What's with characterizing 'small signal MOSFETs' by Qg and R_DSon?
> That's only one example. There are lots of other inappropriate
> parametrizations there. I hate it when they do that. Makes one wonder if
> they understand their own products and their clients' interests.
> 
> Jeroen Belleman

Given that it was bought by an investment group, they'll be in "milk the 
cash cow" mode.

-- 
Tim Wescott
Control systems, embedded software and circuit design
I'm looking for work!  See my website if you're interested
http://www.wescottdesign.com

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#447650

FromJohn Larkin <jjlarkin@highlandtechnology.com>
Date2017-02-14 08:11 -0800
Message-ID<doa6acl0aa7rge36lmq9jqd6kt6b98bf4u@4ax.com>
In reply to#447646
On Tue, 14 Feb 2017 09:57:01 -0600, Tim Wescott <tim@seemywebsite.com>
wrote:

>On Tue, 14 Feb 2017 13:43:59 +0100, Jeroen Belleman wrote:
>
>> On 2017-02-14 13:15, Winfield Hill wrote:
>>> John Larkin wrote...
>>>>
>>>> http://www.nexperia.com/
>>>>
>>>> The web site is still a tad flakey.
>>>
>>>   I see our favorite BF862 low-noise JFET is missing,
>>>   although it still shows at the nxp.com site.
>>>
>>>
>>>
>> What's with characterizing 'small signal MOSFETs' by Qg and R_DSon?

Cg and Rds-on are sometimes useful, for "rf" jfets and phemts, but
seldom available on data sheets. But it sounds like the people who
hacked that web site were in a rush.

>> That's only one example. There are lots of other inappropriate
>> parametrizations there. I hate it when they do that. Makes one wonder if
>> they understand their own products and their clients' interests.
>> 
>> Jeroen Belleman
>
>Given that it was bought by an investment group, they'll be in "milk the 
>cash cow" mode.

Yes. There have been other spinouts of low-end parts business to
investors. Onsemi and Fairchild come to mind.



-- 

John Larkin         Highland Technology, Inc

lunatic fringe electronics 

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#448143

FromRobert Latest <boblatest@yahoo.com>
Date2017-02-18 10:14 +0000
Message-ID<egql4bFkunvU2@mid.individual.net>
In reply to#447646
Tim Wescott wrote:
> On Tue, 14 Feb 2017 13:43:59 +0100, Jeroen Belleman wrote:
>
>> On 2017-02-14 13:15, Winfield Hill wrote:
>>> John Larkin wrote...
>>>>
>>>> http://www.nexperia.com/
>>>>
>>>> The web site is still a tad flakey.
>>>
>
> Given that it was bought by an investment group, they'll be in "milk the 
> cash cow" mode.

Actually, not this time. Cash cow mode was when KKR bought Philips'
semiconductor branch, naming it NXP and putting the financial burden of the
purchase onto the purchased company itself (I never figured out how that
works).

Rather than being sliced up and the parts sold separately, NXP went on to be
quite successful and did a stunning performance as publicly traded company.
However, the "Standard Products" division (for which I work) was quite
obviously always the unloved child of a company that wanted to be big in the
"High Performance Mixed Signal" (HPMS) business, whatever that means. I once
asked the then freshly appointed CEO Rick Clemmer at a town hall how NXP's
HPMS business compared to other HPMS companies, and he said it wasn't really
comparable because he mad that term up.

Anyway, it was only logical for HPMS-oriented to divest the ugly duckling
"Standard Products" with its even uglier child "General Applications," even
though they are doing solid business. We actually contributed above-average
to NXP's total 2016 EBIT.

The new investor is a Chinese pension fund, of course 100% state controlled,
but from what I heard from other JAC-owned companies they are basically about
decade-long strategic investment and not short-term gain. Personally I'm
looking forward to working in an environment that is not a slave of the
stock chart (and nothing else).

robert

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#448139

FromRobert Latest <boblatest@yahoo.com>
Date2017-02-18 09:57 +0000
Message-ID<egqk3tFkunvU1@mid.individual.net>
In reply to#447636
Jeroen Belleman wrote:
> On 2017-02-14 13:15, Winfield Hill wrote:
>> John Larkin wrote...
>>>
>>> http://www.nexperia.com/
>>>
>>> The web site is still a tad flakey.
>>
>>   I see our favorite BF862 low-noise JFET is missing,
>>   although it still shows at the nxp.com site.
>>
>>
>
> What's with characterizing 'small signal MOSFETs' by
> Qg and R_DSon? That's only one example. There are lots
> of other inappropriate parametrizations there. I hate
> it when they do that. Makes one wonder if they understand
> their own products and their clients' interests.

I wonder that myself. "Small signal", by definition, means operating devices
in the linear, i.e. analog region. In reality Nexperia's "small signal"
MOSFETs are meant to be used in low-power switching applications, so they
should be marketed as "low power" or "low current."

robert

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#448164

Fromkrw@notreal.com
Date2017-02-18 10:18 -0500
Message-ID<2dpgac17th2u1iov93j1hugh2m17rhohho@4ax.com>
In reply to#448139
On 18 Feb 2017 09:57:17 GMT, Robert Latest <boblatest@yahoo.com>
wrote:

>Jeroen Belleman wrote:
>> On 2017-02-14 13:15, Winfield Hill wrote:
>>> John Larkin wrote...
>>>>
>>>> http://www.nexperia.com/
>>>>
>>>> The web site is still a tad flakey.
>>>
>>>   I see our favorite BF862 low-noise JFET is missing,
>>>   although it still shows at the nxp.com site.
>>>
>>>
>>
>> What's with characterizing 'small signal MOSFETs' by
>> Qg and R_DSon? That's only one example. There are lots
>> of other inappropriate parametrizations there. I hate
>> it when they do that. Makes one wonder if they understand
>> their own products and their clients' interests.
>
>I wonder that myself. "Small signal", by definition, means operating devices
>in the linear, i.e. analog region. In reality Nexperia's "small signal"
>MOSFETs are meant to be used in low-power switching applications, so they
>should be marketed as "low power" or "low current."

I don't see the issue.  English has many overloaded words.  Context
means everything.

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#447648

FromJohn Larkin <jjlarkin@highlandtechnology.com>
Date2017-02-14 08:01 -0800
Message-ID<nda6aclpe5r8btcrgv3il081a850r33hbf@4ax.com>
In reply to#447635
On 14 Feb 2017 04:15:48 -0800, Winfield Hill
<hill@rowland.harvard.edu> wrote:

>John Larkin wrote...
>>
>> http://www.nexperia.com/
>>
>> The web site is still a tad flakey.
>
> I see our favorite BF862 low-noise JFET is missing,
> although it still shows at the nxp.com site.

Phil will panic!


-- 

John Larkin         Highland Technology, Inc

lunatic fringe electronics 

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#447649

FromWinfield Hill <hill@rowland.harvard.edu>
Date2017-02-14 08:06 -0800
Message-ID<o7v9ts02lat@drn.newsguy.com>
In reply to#447648
John Larkin wrote...
>
>On 14 Feb 2017 04:15:48 -0800, Winfield Hill
><hill@rowland.harvard.edu> wrote:
>
>>John Larkin wrote...
>>>
>>> http://www.nexperia.com/
>>>
>>> The web site is still a tad flakey.
>>
>> I see our favorite BF862 low-noise JFET is missing,
>> although it still shows at the nxp.com site.
>
> Phil will panic!

 We'll all be increasing our lifetime inventories.


-- 
 Thanks,
    - Win

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#447651

FromPhil Hobbs <pcdhSpamMeSenseless@electrooptical.net>
Date2017-02-13 18:20 -0500
Message-ID<o7vaou$s2o$1@dont-email.me>
In reply to#447648
On 02/14/2017 11:01 AM, John Larkin wrote:
> On 14 Feb 2017 04:15:48 -0800, Winfield Hill
> <hill@rowland.harvard.edu> wrote:
>
>> John Larkin wrote...
>>>
>>> http://www.nexperia.com/
>>>
>>> The web site is still a tad flakey.
>>
>> I see our favorite BF862 low-noise JFET is missing,
>> although it still shows at the nxp.com site.
>
> Phil will panic!
>
>

Nah, I have 11k of them, plus 3k CPH3910.  That'll build enough front 
ends to pay for my next yacht. ;)

Cheers

Phil Hobbs

-- 
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net

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#447652

FromJohn Larkin <jjlarkin@highlandtechnology.com>
Date2017-02-14 09:07 -0800
Message-ID<88e6act2vophmmkk38l3orpb1qpjv4rnhq@4ax.com>
In reply to#447651
On Mon, 13 Feb 2017 18:20:30 -0500, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

>On 02/14/2017 11:01 AM, John Larkin wrote:
>> On 14 Feb 2017 04:15:48 -0800, Winfield Hill
>> <hill@rowland.harvard.edu> wrote:
>>
>>> John Larkin wrote...
>>>>
>>>> http://www.nexperia.com/
>>>>
>>>> The web site is still a tad flakey.
>>>
>>> I see our favorite BF862 low-noise JFET is missing,
>>> although it still shows at the nxp.com site.
>>
>> Phil will panic!
>>
>>
>
>Nah, I have 11k of them, plus 3k CPH3910.  That'll build enough front 
>ends to pay for my next yacht. ;)
>
>Cheers
>
>Phil Hobbs

You could build an all-jfet computer!

Or all-jfet audio power amp, and make more money.


-- 

John Larkin         Highland Technology, Inc

lunatic fringe electronics 

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#448144

FromRobert Latest <boblatest@yahoo.com>
Date2017-02-18 10:18 +0000
Message-ID<egqlbiFkunvU3@mid.individual.net>
In reply to#447635
Winfield Hill wrote:
> John Larkin wrote...
>>
>> http://www.nexperia.com/
>>
>> The web site is still a tad flakey.
>
>  I see our favorite BF862 low-noise JFET is missing,
>  although it still shows at the nxp.com site.

I never figured out the BF862. The only way to ever find it on NXPs website
was by entering the type name in the search box. No matter from which angle
you attacked the various selection guides -- you'd never end up at the
BF862.

I've always wanted to research whare the wafers are made. Not in Hamburg,
and probably not in Manchester.

I'm sure it's not just a NXP-labelled generic wafer type from some foundry.
For that, the specs are too unique.

robert

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#448184

FromPhil Hobbs <pcdhSpamMeSenseless@electrooptical.net>
Date2017-02-17 22:50 -0500
Message-ID<aMOdnWRAepxJ5jXFnZ2dnUU7-S2dnZ2d@supernews.com>
In reply to#448144
On 02/18/2017 05:18 AM, Robert Latest wrote:
> Winfield Hill wrote:
>> John Larkin wrote...
>>>
>>> http://www.nexperia.com/
>>>
>>> The web site is still a tad flakey.
>>
>>  I see our favorite BF862 low-noise JFET is missing,
>>  although it still shows at the nxp.com site.
>
> I never figured out the BF862. The only way to ever find it on NXPs website
> was by entering the type name in the search box. No matter from which angle
> you attacked the various selection guides -- you'd never end up at the
> BF862.
>
> I've always wanted to research whare the wafers are made. Not in Hamburg,
> and probably not in Manchester.
>
> I'm sure it's not just a NXP-labelled generic wafer type from some foundry.
> For that, the specs are too unique.
>
> robert
>

Actually, ON Semi has brought out a bunch of JFETs lately that give the 
BF862 a run for its money.  My fave is the ex-Sanyo CPH3910, which is 
just about equivalent to a half-size BF862, except with more than half 
the transconductance.  That's good for a lot of things.

Cheers

Phil Hobbs

-- 
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net

[toc] | [prev] | [next] | [standalone]


#448188

FromWinfield Hill <hill@rowland.harvard.edu>
Date2017-02-18 09:43 -0800
Message-ID<o8a14u015o6@drn.newsguy.com>
In reply to#448184
Phil Hobbs wrote...
>
> Actually, ON Semi has brought out a bunch of JFETs
> lately that give the BF862 a run for its money. 
> My fave is the ex-Sanyo CPH3910, which is just
> about equivalent to a half-size BF862, except
> with more than half the transconductance. 
> That's good for a lot of things.

 Have you examined the dual, CPH6904.


-- 
 Thanks,
    - Win

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#448193

FromPhil Hobbs <pcdhSpamMeSenseless@electrooptical.net>
Date2017-02-18 13:13 -0500
Message-ID<b8Odnb9kaLQuEzXFnZ2dnUU7-SGdnZ2d@supernews.com>
In reply to#448188
On 02/18/2017 12:43 PM, Winfield Hill wrote:
> Phil Hobbs wrote...
>>
>> Actually, ON Semi has brought out a bunch of JFETs
>> lately that give the BF862 a run for its money.
>> My fave is the ex-Sanyo CPH3910, which is just
>> about equivalent to a half-size BF862, except
>> with more than half the transconductance.
>> That's good for a lot of things.
>
>  Have you examined the dual, CPH6904.
>
>

I have some, but haven't done any real measurements.

Cheers

Phil Hobbs

-- 
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics

160 North State Road #203
Briarcliff Manor NY 10510

hobbs at electrooptical dot net
http://electrooptical.net

[toc] | [prev] | [next] | [standalone]


#447638

Frombitrex <bitrex@de.lete.earthlink.net>
Date2017-02-14 08:44 -0500
Message-ID<3RDoA.5997$d55.288@fx25.iad>
In reply to#447619
On 02/14/2017 01:02 AM, John Larkin wrote:
>
> http://www.nexperia.com/
>
> The web site is still a tad flakey.
>
>

Are there any depletions hiding in there somewhere?

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#447788

FromRobert Baer <robertbaer@localnet.com>
Date2017-02-15 13:19 -0800
Message-ID<8B3pA.45797$Pg3.17489@fx42.iad>
In reply to#447619
John Larkin wrote:
>
> http://www.nexperia.com/
>
> The web site is still a tad flakey.
>
>
   WTF is going on WRT cookies?
   Seems more and more sites are getting paranoid to the point of 
demanding a response to their "disclosure".
   Cookies have been around (read: used) for many YEARS.

   This cookie crap is becoming obscene.

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#447789

FromClifford Heath <no.spam@please.net>
Date2017-02-16 03:54 +1100
Message-ID<58a4c7a9$0$31219$c3e8da3$a9097924@news.astraweb.com>
In reply to#447788
On 16/02/17 08:19, Robert Baer wrote:
> John Larkin wrote:
>>
>> http://www.nexperia.com/
>>
>> The web site is still a tad flakey.
>   WTF is going on WRT cookies?
>   Seems more and more sites are getting paranoid to the point of
> demanding a response to their "disclosure".
>   Cookies have been around (read: used) for many YEARS.
>
>   This cookie crap is becoming obscene.

European privacy laws demand they let you know you're being tracked.

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#447790

FromLasse Langwadt Christensen <langwadt@fonz.dk>
Date2017-02-15 13:31 -0800
Message-ID<627e0021-c9c1-4239-942c-25c5475661f4@googlegroups.com>
In reply to#447788
Den onsdag den 15. februar 2017 kl. 22.19.04 UTC+1 skrev Robert Baer:
> John Larkin wrote:
> >
> > http://www.nexperia.com/
> >
> > The web site is still a tad flakey.
> >
> >
>    WTF is going on WRT cookies?
>    Seems more and more sites are getting paranoid to the point of 
> demanding a response to their "disclosure".
>    Cookies have been around (read: used) for many YEARS.
> 
>    This cookie crap is becoming obscene.

sites requiring you to accept cookies is a privacy protection EU law, 
I believe they have now changed it so it is only required for cookies 
that are not only for the site you are visiting

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