Driver to drive?

On Mon, 06 Feb 2012 13:24:31 -0500, legg <legg_at_nospam.magma.ca> wrote:

On Sun, 05 Feb 2012 15:22:14 -0800, John Larkin
jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote:

snip
I remember the classic 2N3055 fiasco, when people started selling tiny
epitaxial parts in aluminum cans as "2N3055", and they tended to blow
up.

It was a little more subtle than that. The original 2N3055 used a
single diffused mesa 'hometaxial' process that produced a large and
rugged but leaky part - needing extra guarding/sealing at edges to
prevent leakage. The parts produced by this process were also heavily
evaluated for avionics and space applications.

As Epitaxial triple diffused processes advanced, parts were fabricated
with roughly the same book ratings in the reduced wafer size that the
new process permitted, due to reduced edge guarding. They were cheaper
to make using the new process, and could be easily adapted to plastic
packaging.

The new parts were not as rugged as the old, due to increased Rthjc,
reduced forward biased safe operating area and secondary breakdown
characteristics - but they eventually obsoleted the old parts for the
reasons previously mentioned. This was not true immediately of all the
original mesa part type numbers - just the ones with cut-throat
consumer application/demand.

During the changeover, the older technology was sometimes identified
by a part number suffix and eventually became associated with
'unprogressive' wafer fabs. The last 2N3055H mesa parts I was ever
forced to purchase in volume were made in Yugoslavia, at a small
fraction of North American book prices. This was probably a result of
distortions in currency and iron curtain exchange, but it prevented
justifying the adoption of more easily processed modern plastic parts
in a new design's bottom line. No doubt reality set in at some later
date....

RL

My experience was going from RCA to Fairchild 2N3055's. The Fairchilds
were much faster, much lighter, had maybe 1/4 the chip area, and blew
up a lot.

On Thu, 02 Feb 2012 11:55:35 +0000, Pomegranate Bastard
pommyB_at_dsl.pipex.com> wrote:

On Tue, 31 Jan 2012 19:07:25 -0800, John Larkin
jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote:

On Tue, 31 Jan 2012 18:17:26 -0800, MassiveProng
MassiveProng_at_thebarattheendoftheuniverse.org> wrote:

On 31 Jan 2012 15:52:23 GMT, John Doe <jdoe_at_usenetlove.invalid> wrote:

Nobody forces anybody else to do anything on UseNet. Your mother
should have taught you self-control.

Nobody forces you to make absolutely retarded, meaningless posts, yet
you insist on doing so. The word is Usenet, idiot.

Your RETARDED, CRIMINAL mother should be jailed for failing to flush
you, the moment the stupid slut shat you.

You keep repeating that image. That's sick in so many way

This is Nymbecile's favourite insult.

It's yet another demonstration of what a sad, useless life this
imbecile leads.

Beyond sad. Really, really sick.

On Thu, 02 Feb 2012 07:20:52 -0800, John Larkin
jjlarkin highNOTlandTHIStechnologyPART.com> wrote:

On Thu, 02 Feb 2012 11:55:35 +0000, Pomegranate Bastard
pommyB dsl.pipex.com> wrote:

On Tue, 31 Jan 2012 19:07:25 -0800, John Larkin
jjlarkin highNOTlandTHIStechnologyPART.com> wrote:

On Tue, 31 Jan 2012 18:17:26 -0800, MassiveProng
MassiveProng thebarattheendoftheuniverse.org> wrote:

On 31 Jan 2012 15:52:23 GMT, John Doe <jdoe usenetlove.invalid
wrote:

Nobody forces anybody else to do anything on UseNet. Your mother
should have taught you self-control.

Nobody forces you to make absolutely retarded, meaningless posts,
yet
you insist on doing so. The word is Usenet, idiot.

Your RETARDED, CRIMINAL mother should be jailed for failing to
flush
you, the moment the stupid slut shat you.

You keep repeating that image. That's sick in so many way

This is Nymbecile's favourite insult.

It's yet another demonstration of what a sad, useless life this
imbecile leads.

Beyond sad. Really, really sick.

So why do you keep responding to AlwaysWrong?

?-(



Path: news.astraweb.com!border6.newsrouter.astraweb.com!not-for-mail
From: josephkk <joseph_barrett sbcglobal.net
Newsgroups: sci.electronics.design
Subject: Re: John Doe defines his stupidity level for all to see
Date: Mon, 06 Feb 2012 21:14:51 -0800
Message-ID: <voc1j7ts8j8085cqd7ev7si5jn0ssqgq6g 4ax.com
References: <4f236128$0$32059$c3e8da3$40d4fd75 news.astraweb.com> <jg83f3$vde$1 speranza.aioe.org> <4f27a313$0$27035$c3e8da3$fdf4f6af news.astraweb.com> <jg8apv$anh$1 dont-email.me> <4f280e37$0$2076$c3e8da3$a9097924 news.astraweb.com> <f18hi75oqj3kbnq0g39m11cmh1vtc3sqor 4ax.com> <k2bhi7ha5n0nvpq082g8vek0dmnmfvos1h 4ax.com> <m5uki7tjt2ibrtbj50gpsftjb450elrm3l 4ax.com> <ddali79cud1l6t3br6sdde54m1gaae3ghq 4ax.com
X-Newsreader: Forte Agent 6.00/32.1186
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: quoted-printable
Lines: 38
Organization: Unlimited download news at news.astraweb.com
NNTP-Posting-Host: f3247f54.news.astraweb.com
X-Trace: DXC=6dJ49<R_fS2SG6fD[7G;H=L?0kYOcDh :m]aCQX?:M72>3<:Wm\C]Q?U <j_i<C 0<fO_l6mMBgY<FG5Vj5nF=a8N6cZAYT>]k;5IV^_GFD7U;

Larkin's narcissism is such that he thinks he can rescue even such as
NymNoNuts.

?-)

Suppose Nimmie is right

On Mon, 06 Feb 2012 10:10:51 -0800 John Larkin
jlarkin_at_highlandtechnology.com> wrote in Message id:
5i50j7dppopsm5ha1to21cb8o77d8vio5c_at_4ax.com>:

Suppose Nimmie is right

*Guffaw!*

On Mon, 06 Feb 2012 07:21:07 -0800, John Larkin
jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote:

Under US law, a part number can't be copyrighted. Absent patent
protection, nothing stops anyone from making and selling LT1013's.

Unless they claim like operation or tout it as a replacement.

On Thu, 02 Feb 2012 05:22:23 -0700, Jim Thompson
To-Email-Use-The-Envelope-Icon_at_On-My-Web-Site.com> wrote:

On Thu, 02 Feb 2012 11:55:35 +0000, Pomegranate Bastard <pommyB_at_dsl.pipex.com
wrote:

On Tue, 31 Jan 2012 19:07:25 -0800, John Larkin
jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote:

On Tue, 31 Jan 2012 18:17:26 -0800, MassiveProng
MassiveProng_at_thebarattheendoftheuniverse.org> wrote:

On 31 Jan 2012 15:52:23 GMT, John Doe <jdoe_at_usenetlove.invalid> wrote:

Nobody forces anybody else to do anything on UseNet. Your mother
should have taught you self-control.

Nobody forces you to make absolutely retarded, meaningless posts, yet
you insist on doing so. The word is Usenet, idiot.

Your RETARDED, CRIMINAL mother should be jailed for failing to flush
you, the moment the stupid slut shat you.

You keep repeating that image. That's sick in so many way

This is Nymbecile's favourite insult.

It's yet another demonstration of what a sad, useless life this
imbecile leads.

Yet other imbeciles persist in feeding the troll, ensuring his position at the
podium. If everyone shunned him, he'd become invisible... and cease being
annoying.

...Jim Thompson

Larkin's narcissism is such that he thinks he can rescue even such as
NymNoNuts.

?-)

*Guffaw!*

On Feb 5, 5:39 pm, Jim Thompson wrote:
On Sun, 05 Feb 2012 14:08:18 -0800, John Larkin wrote:
On Sun, 05 Feb 2012 13:28:58 -0700, Jim Thompson wrote:

So far, life has been a huge amount of fun. But what does that have to
do with diodes?

The same as talking amps of current in a 1N4148.

http://www.nxp.com/documents/data_sheet/1N4148_1N4448.pdf

Looks effectively ohmic above 50mA (Fig. 3).

On Sun, 5 Feb 2012 17:22:24 -0800 (PST), dagmargoodboat_at_yahoo.com
wrote:

On Feb 5, 5:39 pm, Jim Thompson wrote:
On Sun, 05 Feb 2012 14:08:18 -0800, John Larkin wrote:
On Sun, 05 Feb 2012 13:28:58 -0700, Jim Thompson wrote:

So far, life has been a huge amount of fun. But what does that have to
do with diodes?

The same as talking amps of current in a 1N4148.

http://www.nxp.com/documents/data_sheet/1N4148_1N4448.pdf

Looks effectively ohmic above 50mA (Fig. 3).

Yup. The slope is just about 1 ohm. The dynamic impedance of a PN
junction is 1 ohm at 25 mA.

On Feb 7, 9:53 pm, Jim Thompson <To-Email-Use-The-Envelope-I...@On-My-
Web-Site.com> wrote:
On Tue, 07 Feb 2012 18:40:31 -0800, John Larkin





jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Sun, 5 Feb 2012 17:22:24 -0800 (PST), dagmargoodb...@yahoo.com
wrote:

On Feb 5, 5:39 pm, Jim Thompson wrote:
On Sun, 05 Feb 2012 14:08:18 -0800, John Larkin wrote:
On Sun, 05 Feb 2012 13:28:58 -0700, Jim Thompson wrote:

So far, life has been a huge amount of fun. But what does that have to
do with diodes?

The same as talking amps of current in a 1N4148.

http://www.nxp.com/documents/data_sheet/1N4148_1N4448.pdf

Looks effectively ohmic above 50mA (Fig. 3).

Yup. The slope is just about 1 ohm. The dynamic impedance of a PN
junction is 1 ohm at 25 mA.

Closer to 26mA ;-)

                                        ...Jim Thompson
[snip]

- Show quoted text -

1 ohm is a pretty good number for a small junction. I measured a
2n3904 about the same.

Neat, how the resistance goes to ~1.5 ohms at ~450K.

George H.

Precise small-signal slope (assuming no resistive part) is kT/qI, or
~26/I(in mA) at 300°K

...Jim Thompson

On Tue, 07 Feb 2012 18:40:31 -0800, John Larkin





jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Sun, 5 Feb 2012 17:22:24 -0800 (PST), dagmargoodb...@yahoo.com
wrote:

On Feb 5, 5:39 pm, Jim Thompson wrote:
On Sun, 05 Feb 2012 14:08:18 -0800, John Larkin wrote:
On Sun, 05 Feb 2012 13:28:58 -0700, Jim Thompson wrote:

So far, life has been a huge amount of fun. But what does that have to
do with diodes?

The same as talking amps of current in a 1N4148.

http://www.nxp.com/documents/data_sheet/1N4148_1N4448.pdf

Looks effectively ohmic above 50mA (Fig. 3).

Yup. The slope is just about 1 ohm. The dynamic impedance of a PN
junction is 1 ohm at 25 mA.

Closer to 26mA ;-)

                                        ...Jim Thompson
--
| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  |
| E-mail Icon athttp://www.analog-innovations.com|    1962     |

I love to cook with wine.     Sometimes I even put it in the food.- Hide quoted text -

- Show quoted text -

On Sun, 05 Feb 2012 15:13:38 -0800, josephkk
joseph_barrett_at_sbcglobal.net> wrote:

On Thu, 02 Feb 2012 21:09:10 -0800, John Larkin
jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote:

On Thu, 02 Feb 2012 20:28:15 -0800, josephkk
joseph_barrett_at_sbcglobal.net> wrote:

On Sat, 28 Jan 2012 17:42:27 -0800, John Larkin
jjlarkin_at_highNOTlandTHIStechnologyPART.com> wrote:


I don't really think an "arbitrary" definition is necessary, since the
location of the knee has been with us for decades.

John, I told you there are people who believe there is a "knee" in an
exponential function. ;-)

And there are people who think that the only kind of resistance is
E/I.

Some famous person once said "When all you know is Ohm's Law,
everything looks like a resistor."

Well, that was me, actually.


Switch famous to infamous and the description of yourself is all too apt.

?-)

After almost a week of brooding, that's all you can come up with?

Naw, it is all you are worth. But it is fun to rag on your vainglory.

?-)

That took three days?