new dual NPN and PNP transistors

[Winfield Hill]

Spehro Pefhany wrote...

And here's one that's more specified for current mirror applications:
http://www.infineon.com/cmc_upload/documents/044/192/bcm846s.pdf
http://www.infineon.com/cmc_upload/documents/044/193/bcm856s.pdf
Again, no sign of availability.

But, the most interesting one to me is this one from Diodes Inc.:
http://www.diodes.com/datasheets/ds30311.pdf
http://www.diodes.com/datasheets/ds30312.pdf

Diodes Inc's DMMT3904W and DMMT3906W npn and pnp duals in sot-363
packages.

"Built with adjacent die from a single wafer (!!!!)
2% Matched Tolerance, hFE, VCE(SAT), VBE(SAT)"

Almost as strange as h_FE matching, why would one want Vce(sat)
matching? And can we assume that Vbe(sat) matching corresponds
to Vbe (linear) matching? At any current? That would be nice.
Hmm, 2% Vbe match, that'd be about 15mV, not spectacular, but
we don't much to choose from these days.

Mouser has them in stock and they are only 16 cents US in 1K.

That's nice.

 

[John Woodgate]

I read in sci.electronics.design that Spehro Pefhany <speffSNIP@interlog

There's no need to inspissate pea soup.

No, it's spiss enough already. Or should be. *Watery* pea soup is
disgusting. Something in it hydrolyses and makes it taste as if the peas
were decayed.

But hey, pea soup can be pretty good. Especially with a few other
vegetables and lots of smoked ham or bacon.

The Dutch make 'erwtensoepe' with smoked bacon. You can stand a spoon up
in it. Very good. The 'w' is a vowel.

 

[Joerg]

Hi Jim,

I'm sitting here doing just that right now. Replacing a couple of
pages of kludge (clearly designed by a discrete designer ;-) with a
few current mirrors, and improving the system accuracy an order of
magnitude.

I just did the opposite, creating a fault detection and timing around a
hex Schmitt trigger, with several discretes. You'd probably cringe but
for many application the cost for a chip design, masks and fab just
isn't in the cards. Although this one could clearly be done on any old
CMOS process.

The other thing that often baffles me is production cost. You have a
design with a few CMOS logic chips and a few dozen discretes, thinking
that an IC would run circles around that even if it cost $3 including
the NRE amortization. Ten years ago, considering domestic production, it
certainly would have. Nowadays the discrete version often costs much
less than that in production. In China, of course. With logic chips
running around 10 cents or less and discretes often in the sub-penny
range it's hard to beat discrete at times. The absolute rule to get
there is to use a "preferred list of parts" such as 100K 0204 resistors
and zero single-sourced content. Just a single fancy part would blow you
out of the water in terms of cost.

Regards, Joerg

 

[Jim Thompson]

On Mon, 4 Oct 2004 17:15:03 +0100, John Woodgate

[snip]

The Dutch make 'erwtensoepe' with smoked bacon. You can stand a spoon up
in it. Very good. The 'w' is a vowel.

That's my kind of split pea soup... good and thick ;-)

...Jim Thompson

 

[John Larkin]

Speaking generally, the Japanese and European websites are nearly useless.
I've had some limited success with NEC and Toshiba. My guess is that
they went out and spent money on a pretty website that is pretty much
useless.

Tim.

For NEC semiconductors, try CEL.COM. Much better.

John

 

[Spehro Pefhany]

For NEC semiconductors, try CEL.COM. Much better.

John

I think you get shunted there anyways, from the obvious www.nec.co.jp.

Part (certainly not all) of the problem is that companies such as NEC,
Toshiba, Hitachi, etc. are huge conglomerates selling everything from
commmercial satellite base stations to heavy equipment and ships to
consumer products. Same (evenmoreso) with their Korean Chaebol
cousins).


Best regards,
Spehro Pefhany

 

[Rich Grise]

There's no need to inspissate pea soup.

But hey, pea soup can be pretty good. Especially with a few other
vegetables and lots of smoked ham or bacon.

I've always liked peas as a side veggie, or fresh off the vine(?) in the
garden, but I've always found the texture of pea soup to be off-putting.

Now, a big plate of smoked ham and bacon - Yum!

Thanks,
Rich

 

[Rich Grise]

On Mon, 4 Oct 2004 17:15:03 +0100, John Woodgate

[snip]

The Dutch make 'erwtensoepe' with smoked bacon. You can stand a spoon up
in it. Very good. The 'w' is a vowel.

That's my kind of split pea soup... good and thick ;-)

Yeah - makes good spackle for those pea-green walls. ;-)

Cheers!
Rich

 

[Rich Grise]

On Sun, 03 Oct 2004 22:42:43 GMT, Joerg

[snip]

Sometimes I envy chip designers like Jim Thompson who can add matched
circuitry with a few mouse strokes and it costs them next to nothing.

Regards, Joerg

I'm sitting here doing just that right now. Replacing a couple of
pages of kludge (clearly designed by a discrete designer ;-) with a

^^^^^^

I can rationalize "Apostrophe police," but what do I call my fanatical
overreaction when people who are trying to say "klooge", write something
that rhymes with "sludge"?

few current mirrors, and improving the system accuracy an order of
magnitude.

Thanks,
Rich

 

[Spehro Pefhany]

On Sun, 03 Oct 2004 22:42:43 GMT, Joerg

[snip]

Sometimes I envy chip designers like Jim Thompson who can add matched
circuitry with a few mouse strokes and it costs them next to nothing.

Regards, Joerg

I'm sitting here doing just that right now. Replacing a couple of
pages of kludge (clearly designed by a discrete designer ;-) with a

^^^^^^

I can rationalize "Apostrophe police," but what do I call my fanatical
overreaction when people who are trying to say "klooge", write something
that rhymes with "sludge"?

"Kludge" (or, some allow, "kluge") is the correct spelling, of course:
http://www.bartleby.com/61/50/K0085000.html
http://www.m-w.com/cgi-bin/dictionary?book=Dictionary&va=kludge&x=0&y=0

Hey, it's English- the spelling and pronunciation doesn't have to
follow any one pattern. Like the imaginary word "ghot" (pronounced
"fish"- 'gh' as in "laugh", 'o' as in "women", and 't' as in
"nation").



Best regards,
Spehro Pefhany

 

[John Woodgate]

I read in sci.electronics.design that Spehro Pefhany <speffSNIP@interlog

Like the imaginary word "ghot" (pronounced "fish"- 'gh'
as in "laugh", 'o' as in "women", and 't' as in "nation").

George Bernard Shaw wrote 'ghoti'. How about 'Phtholognerrh'?

 

[Joerg]

Hi Spehro,

"Kludge" (or, some allow, "kluge") is the correct spelling, of course:
http://www.bartleby.com/61/50/K0085000.html

Don't know about that one. It's not kluge in German but klug.

Anyway, all I heard about that was that it was a name of a German
officer or general who had a reputation of being very inventive when his
troops ran out of spare parts. Supposedly he'd improvise everything. Had
he lived today he probably would have written "1000 Uses for Duct Tape".

Hey, it's English- the spelling and pronunciation doesn't have to
follow any one pattern. Like the imaginary word "ghot" (pronounced
"fish"- 'gh' as in "laugh", 'o' as in "women", and 't' as in
"nation").

Or like "bot", Canadian short version for "about, 'o' as in "woman".

Regards, Joerg

 

[Spehro Pefhany]

I read in sci.electronics.design that Spehro Pefhany <speffSNIP@interlog


George Bernard Shaw wrote 'ghoti'. How about 'Phtholognerrh'?

<LOL> I googled it and found that there is a person using the
pseudonym "Ghoti Phtholognyrrh".

http://forum.starmen.net/index.php?t=usrinfo&id=437


Best regards,
Spehro Pefhany

 

[John Woodgate]

I read in sci.electronics.design that Spehro Pefhany <speffSNIP@interlog

<LOL> I googled it and found that there is a person using the pseudonym
"Ghoti Phtholognyrrh".

'yrrh' as in 'myrrh'. Yes. But having 'Fish' as a first name looks a bit
fishy, whereas 'Turner' is a very good surname - my mother's. (;-)

 

[Rich Grise]

I read in sci.electronics.design that Spehro Pefhany <speffSNIP@interlog


'yrrh' as in 'myrrh'. Yes. But having 'Fish' as a first name looks a bit
fishy, whereas 'Turner' is a very good surname - my mother's. (;-)
--

It's not his name, it's his job! ;-)

 

[Rich Grise]

....

Or like "bot", Canadian short version for "about, 'o' as in "woman".

Huh?

In Canada, "about" is pronounced, "aboot". Where are you at, if you don't
mind my asking? (or even if you do mind, it's too late, I've already
asked. >:-> )

Thanks,
Rich

 

[Joerg]

Hi Rich,

Huh?

In Canada, "about" is pronounced, "aboot". Where are you at, if you don't
mind my asking? (or even if you do mind, it's too late, I've already
asked. >:-> )

In Kahlifohniah. Northern part, near Sacramento.

You are right. Should have said 'o' as in tombstone. Unless they
pronounce that differently elsewhere.

Regards, Joerg

 

[John Woodgate]

I read in sci.electronics.design that Rich Grise <[email protected]>

It's not his name, it's his job! ;-)

What sort of lathe does he use? Does he cut off slices to make fish-
plates?

 

[Spehro Pefhany]

It's not his name, it's his job! ;-)

There's a local funeral home chain called "Turner and Porter". Nice
division of labor. One of their competitors is "Skinner and
Middlebrook".


Best regards,
Spehro Pefhany

 

[Rich Grise]

Hi Rich,

In Kahlifohniah. Northern part, near Sacramento.

You are right. Should have said 'o' as in tombstone. Unless they
pronounce that differently elsewhere.

I was in my teens before I found out that "womb" doesn't rhyme with
"bomb." (most of what I'd learned I got from reading.)

Thanks,
Rich