OT: Bush Thugs Rough Up Grieving Mother of KIA

[Winfield Hill]

Ian Stirling wrote...

Paul Burridge wrote:
Helmut Sennewald wrote:

Vgs_off seems to be often specified at Id=1nA. The measurement
at such low current levels takes a lot of time and it requires a
very clean test fixture.

Is it 1nA? I thought it was 5. No matter.
Yes, I'd expected someone to point out that the "negligible current"
point was the likely problem area. I can't honestly say that I have,
because my DVM drops out at 0.01mA! However, in the context of the

Turn it to voltage. Most meters (the four I've measured) have a 1Mohm
or so input impedance on the 200mv range. This is 200nA full scale.
Probably best to do the test twice, with the meter leads reversed though.

The multimeters on my bench have infinite input impedance on the 200mV
scale, although some let you turn on an internal resistor. We can use
external 10M or 100M if we like, which gives 1pA and 0.1pA measurement
resolution with a 4.5-digit meter.

The relevant "subthreshold" formula is Id = k e^(Vgs - Vt), which is
an exponential equation that clearly shows there's no sudden threshold
for FET current => negligible. Paul can take a look at AoE page 123,
and observe the measured gate-voltage to drain current relationship for
a typical MOSFET, which shows the standard smooth 100 or 150mV/decade
(p or n-type) gate-voltage change over a wide 7-decade current range.

1 or 5nA makes no difference? Nope, that apparently small detail makes
a predictably large 70 to 100mV difference. One must pay attention to
the specifications in this matter, 1nA, 1uA, whatever - it's a big deal.

BTW, as I've pointed out several times, power MOSFET spice models are
completely wrong in this region, just forget considering their results.


--
Thanks,
- Win

(email: use hill_at_rowland-dotties-org for now)

 

[Rich Grise]

On Tuesday 21 September 2004 03:58 am, YD did deign to grace us with the
following:

On Tue, 21 Sep 2004 03:49:56 GMT, Rich Grise <null@example.net> wrote:

On Sunday 19 September 2004 08:00 pm, YD did deign to grace us with the
following:

On Sun, 19 Sep 2004 00:06:04 GMT, Rich Grise <null@example.net> wrote:

So, just lurking is OK, but when you come in and the only contribution
is to bitch about there being OT posts, well, welcome to USENET.

Hey, I read the on-topic posts for the learning, but I actually have
fun reading the OT stuff. Interesting to see a bunch of grown-ups
^[0]
bitching at each other without actually getting anywhere. And the OT
threads seem to accumulate a lot more posts too.


[0] purported? alleged? so-called?

;-)
Rich

AOA plus supposed, believed, self-appointed. Take your pick

Well, upon occasion, I've been known to pretend to act like a self-appointed

one. ;-)

Cheers!
Rich

 

[Ian Stirling]

In sci.electronics.design Rakesh Sharma <srakesh@hotmail.com> wrote:

Hi,

How would I construct an XOR function using NOR gates ONLY? I have
tried breaking my head over it but haven't come up with a solution.

Work out how to make other stuff.
Start out with an inverter.
Now, see if you can use this to make an and gate.

Now, go on to nand and ...

Now, you have the building blocks.
Start playing with them, and see how you can reduce the gate count
as much as possible.

 

[Fred Bloggs]

Rakesh Sharma wrote:

Hi,

How would I construct an XOR function using NOR gates ONLY? I have
tried breaking my head over it but haven't come up with a solution.

Thanks in advance

Rakesh

EXOR(A,B)=OR(AND(A,/B),AND(/A,B)) and since AND(X,Y)=NOR(/X,/Y) and
OR(X,Y)=NOT NOR(X,Y) you're done.

 

[Guy Macon]

Kevin Aylward <salesEXTRACT@anasoft.co.uk> says...

Guy Macon wrote:
Kevin Aylward <salesEXTRACT@anasoft.co.uk> says...

I responded in this manner to *this* particular post. Feel free to
search my other 10,000 posts and note how rarely I personally insult
people.

Here are hundreds and hundreds of examples of you insulting people:

http://groups.google.com/groups?q=ignorant+author%3A%22Kevin+Aylward%22
http://groups.google.com/groups?q=idiot+author%3A%22Kevin+Aylward%22
http://groups.google.com/groups?q=stupid+author%3A%22Kevin+Aylward%22
http://groups.google.com/groups?q=moron+author%3A%22Kevin+Aylward%22
http://groups.google.com/groups?q=fuck+author%3A%22Kevin+Aylward%22
http://groups.google.com/groups?q=bloody+author%3A%22Kevin+Aylward%22

..and those are just the first six words I checked.

All you have done is listed posts with me it it,

Wrong again. Posts that you wrote, not posts with you in them.

and then cliamed that I have made the offending words.

I did enough random sampling to see that in many (perhaps most)
cases it was you who was doing the flaming. If you wish to look'
at them all, do a count, and publish the statistics, have fun;
I have better uses for my time. I saw enough examples to prove
that you commonly insult people.

 

[John Woodgate]

I read in sci.electronics.design that Mike Monett <no@spam.com> wrote
(in <4157159D.3F89@spam.com&gt about 'Patents, Prior Art, Publication and
Usenet.', on Sun, 26 Sep 2004:

Would you trust me if I showed you a sealed envelope with a date and
time stamp and I told you I mailed it to myself a year ago?

Neither would a jury

That's why I specified 'Recorded delivery'. The delivery is recorded
quite independently of the sender, by the Post Office. The envelope
carries a label with a number which can be used to retrieve the record.
I might have said, 'Stick the label over the flaps of the envelope so
that it can't be opened without destroying the label'.
--
Regards, John Woodgate, OOO - Own Opinions Only.
The good news is that nothing is compulsory.
The bad news is that everything is prohibited.
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk

 

[Jonathan Kirwan]

On Sun, 26 Sep 2004 18:17:16 GMT, Jonathan Kirwan <jkirwan@easystreet.com>
wrote:

A quick google yielded:
http://cie2.nist.gov/documents/CIE%20D2%20quad%20rep%202003.pdf

I was a little interested in some of the details, so I looked further.

The complete symposium is copyrighted as a whole, I think, and one must pay a
fair fee for it. But the list of papers presented will help find individual
articles. The list is found here:

http://knt186.knt.vein.hu/cie2002/data/aaTimeTable-Final.pdf

As an example, one of those articles can be found here:

http://cie2.nist.gov/TCs/Open_documents/TC2-49/Ohno1_CIE%20Sympo%202002.pdf

A more detailed overview of various articles are here:

http://knt186.knt.vein.hu/cie2002/Abst_data/

Jon

 

[Geir Klemetsen]

"Rakesh Sharma" <srakesh@hotmail.com> skrev i melding
news:17c0a468.0409261152.eb042ba@posting.google.com...

Hi,

How would I construct an XOR function using NOR gates ONLY? I have
tried breaking my head over it but haven't come up with a solution.

Thanks in advance

Rakesh

This should work:

__
.------------|>=|
| |1 |o-------.
| .-|__| |
| __ | | __ __
A----o-|>=| | '-|>=| .------|>=|
|1 |o----| |1 |o-' |1 |o- X
B----o-|__| | .-|__| .---|__|
| | __ | |
| '-|>=| | |
| |1 |o-------' 0|
o------------|__|
created by Andy´s ASCII-Circuit v1.24.140803 Beta www.tech-chat.de

Must be viewed in fixed font.

 

[Kevin Aylward]

Guy Macon wrote:

Kevin Aylward <salesEXTRACT@anasoft.co.uk> says...

Guy Macon wrote:

Kevin Aylward <salesEXTRACT@anasoft.co.uk> says...

Heisenberg was wrong.

Care to explain why so many intelligent and well-educated people
think that Heisenberg was right?

Because they are mistaken.

They wrote a FAQ about you:

http://www.uwasa.fi/~ts/http/crackpot.html

And one on you:

http://www.apa.org/journals/psp/psp7761121.html

Kevin Aylward
salesEXTRACT@anasoft.co.uk
http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.

 

[Rich Grise]

On Tuesday 21 September 2004 09:15 am, John Woodgate did deign to grace us
with the following:

I read in sci.electronics.design that Guy Macon <http@?.guymacon.com
wrote (in <10l0gerti2uff5@news.supernews.com&gt about '[OT]: Ping Kevin
Aylward - re your "scientific paper"', on Tue, 21 Sep 2004:
This is
important in memetic theory because some memes hide from some observers.

Yes, there's at least one that seems to hide from Kevin. There are
several that hide from me, I know.
--

I have tools to root them out, if you'd like. (actually, I've been
blathering on about nothing else for some days now, except for when
I've been harassing Kevin.

Cheers!
Rich

 

[Rich Grise]

On Sunday 26 September 2004 08:43 am, Marco Ferra did deign to grace us with
the following:

I have coded a little routine to operate a LCD (16x2 HD44780U) through a
8051 (at89s51) micro-controller and I haven't tested it yet, but I'm
afraid that it won't work properly.

Then it probably won't.

Besides watching the busy flag signal of the LCD is there any other
preocupation about timings? Or checking other pins?

I don't know. What does the data sheet say?

In the code below, is it possible to "jb" directly a pin like p1.7? The
assembler (asem51) doesn't complain but I'm not sure.

I don't know. What does the data sheet say?

Good Luck!
Rich

 

[John Larkin]

On 26 Sep 2004 15:58:16 GMT, rolavine@aol.com (Rolavine) wrote:

From: John Larkin

Teresa "I am an African-American" Heinz is a real hoot.


You righties are low as worms.

I'm not a rightie, but it is true that I'm easily amused.

It is not enough that you lie about Kerry, make
clever weasels about his votes in the senate, Start whisper campaigns based on
BS, make headlines with swift boaters without evidence, crucify CBS news while
promoting dozens of news sewers that will never have 1% of the credibility of
CBS on their best day, but now you attack the women and children.

I have not done any of the above. Get mad at somebody else.

John

 

[John Larkin]

On Sun, 26 Sep 2004 17:06:21 +0100, John Woodgate
<jmw@jmwa.demon.contraspam.yuk> wrote:

I read in sci.electronics.design that Rolavine <rolavine@aol.com> wrote
(in <20040926113611.07480.00001256@mb-m18.aol.com&gt about '[OT]: The
not-so-democratic Democrats', on Sun, 26 Sep 2004:
From: John Larkin

Kerry should have let it go. The entire Demo convention was a
stunningly goofy band-of-brothers, reporting-for-duty cartoon.

From now on, to save time could we just call this absurd assertion Larkin's
Milarchy.

'Milarchy'? A venture at 'malarkey' or a coining for 'government by
soldiers'?

Isn't Milarchy a network of defense satellites?

John

 

[Rich Grise]

On Sunday 26 September 2004 02:12 pm, Geir Klemetsen did deign to grace us
with the following:

"Rakesh Sharma" <srakesh@hotmail.com> skrev i melding
news:17c0a468.0409261152.eb042ba@posting.google.com...
Hi,

How would I construct an XOR function using NOR gates ONLY? I have
tried breaking my head over it but haven't come up with a solution.

Thanks in advance

Rakesh


This should work:

Please don't do the kiddies' homework for them.

Thanks,
Rich

 

[Rich Grise]

On Sunday 26 September 2004 09:12 am, Clifford Heath did deign to grace us
with the following:

ChrisGibboGibson wrote:
If I was to
publish details on the net, would that qualify as prior art/publication
such that if any one else tried to patent the idea, then that application
could be refused

Yes. But it would be better if you had documentary evidence to back
it up, such as a registered dated deposition lodged with a third party
containing the salient details. If you get sued, you drag it out.
Better still if you published it in a magazine or journal.

Go to the public library, and ask in the reference section for a book
called "Patent It Yourself." It has all the forms you need to file an
official invention disclosure, and explains everything there is to know
about patents. Well, US patents. ;-)

Good Luck!
Rich

 

[Joerg]

Hi Winfield,

You need a fast low-capacitance MOSFET with low ON resistance.


That's the dream of every high speed designer. Something like 10Ohms and

a fraction of a pF. Maybe some day it comes true.

BTW, one other solution for a switch without charge injection would be
to use (or rather abuse) a double-balanced mixer such as those from Mini
Circuits. But it would add a few Dollars. I did that on a sample and
hold a long time ago although I was greedy and rolled my own. I think
Mini Circuits made dedicated "balanced diode switches" in those days,

One good choice is a part from the old Siliconix (now Vishay)
SD210 family, with Cdx = 1.1pF and Ron = 45 ohms. The SD211
has a useful gate-protection zener. Future Electronics stocks
the SD210DE, but requires a minimum 50-piece purchase. These
parts are also made by Calogic and Linear Integrated Systems,
who may have better inventory sources.

You will find that modern apparently-superior cmos IC switches
have very high capacitance, compared to the sd210 family.


I believe that one also went to Calmos, like the SD5400 did..

Regards, Joerg

http://www.analogconsultants.com

 

[Mike Monett]

John Woodgate wrote:

I read in sci.electronics.design that Mike Monett <no@spam.com> wrote

[...]

Would you trust me if I showed you a sealed envelope with a date and
time stamp and I told you I mailed it to myself a year ago?

Neither would a jury

That's why I specified 'Recorded delivery'. The delivery is recorded
quite independently of the sender, by the Post Office. The envelope
carries a label with a number which can be used to retrieve the record.
I might have said, 'Stick the label over the flaps of the envelope so
that it can't be opened without destroying the label'.

The opposing attorney has 1,000 ways to tear that evidence to shreds and
make you look like a crook.

You need bulletproof documentation that you have absolutely no way to
modify afterwards. Documents in USPTO custody help, but they are only
good for two years. Good lab book practises help, and published articles
in respected journals help. But there is still no guarantee.

A good patent attorney will attack a patent every way he can. Your
defense may withstand all his attacks, but fail in one. That's all he
needs to win the case. You may have inadvertently written one negative
comment in your lab book about a failed experiment, and give the
impression the whole idea is worthless. The attorney can focus on that
mistake and make it very difficult for you to defend the patent.

Another problem is the way a patent is written. It is very difficult to
write a bulletproof patent, and most patents can be broken in many ways.
There may be a loophole that allows you to do the same thing a different
way, or the patent may have a glaring flaw the inventors overlooked.

Best thing is to try to avoid litigation with good documentation and
published articles, and focus on satisfying customers and gaining market
share.

Mike Monett

 

[Rich Grise]

On Sunday 26 September 2004 10:54 am, Jim Thompson did deign to grace us
with the following:

On Sun, 26 Sep 2004 18:44:14 +0100, John Woodgate
jmw@jmwa.demon.contraspam.yuk> wrote:

I read in sci.electronics.design that Mike Monett <no@spam.com> wrote
(in <4156F195.4DFA@spam.com&gt about 'Patents, Prior Art, Publication and
Usenet.', on Sun, 26 Sep 2004:

Do not send yourself a registered letter. This
doesn't work.

Why not? Because USPS will fail to deliver it?

Yep ;-) Anything critical I always send by FedEx.

No, it's been ruled in court that a self-addressed letter doesn't
prove anything.

Sorry.
Rich

 

On Sun, 26 Sep 2004 10:49:36 +0100, "R.Lewis" <h.lewis-not this
bit-@connect-2.co.uk> wrote:

If you bother to learn something about the subject you would not need to ask
such silly questions.

The statement above leads me to think that I did not explain myself

clearly. Here goes again:

Intent: We are trying to achieve maximum perceived brightness using a
plulsed LED, but using the least power consumption.

1) If we leave the LED on solid, without pulsing it, then we will use
up too much energy and we will not achieve a high brightness because
the LED can not handle hundreds of milliamps for a long time.

2) If we pulse the LED using a 1ms pulse, we will have to drive so
much current into the LED in order to achieve any brightness, that it
will be destroyed.

3) If we give the LED a strong 20ms pulse then we will achieve a
blinding flash without destroying the LED. Note however, that dumping
the spike from a fully charged inductor into an LED directly, puts
tremendous thermal stress on the die; so we should strive to shape the
waveform such that thermal cycling can take place more gently. Some
kind of pulse forming LC network would be good. I thought a radar
modulator type "simulated transmission line" energy storage network
might be interesting to try because it would avoid the spike, but
since we are not talking about huge power levels here, perhaps slowly
switching a transistor on and off might do the trick. Here is a simple
PWM soft start circuit for doing that:

In---1M--+--100K--1uF--+
| |
| |
+--|>o--------+--Out to driver stage
| 4584
|
1nF
|
GND

4) When I did a little personal experiment in my home lab and
delivered a 2 millijoule pulse of "energy" to a red LED, I quickly
found that a 10ms pulse appears much brighter than a 1ms pulse or a 1
second pulse. Furthermore, I found that if I operate the LED just
below the threshold of destruction then the 15ms pulse gave me the
most percieved brightness for the least ammount of energy.

Personally I draw it at apprix 15ms but that is my own judgement.
Some literature draws it at 10ms.


Draw the line where you like - just don't believe it means anything.


I think a lot of people would like to see the reference " Some literature
draws it at 10ms." - especially Ms Goodman at the CIE whose (Div 2) report
begins ...

Division 2. Physical measurement of light and radiation

UK Representative: Miss T M Goodman. Tel: 020 8943 6863.
e-mail:teresa.goodman@npl.co.uk

A major activity this year was the joint Division 1/Division 2 symposium on
ěTemporal and Spatial Aspects of Light and Colour Perception and
Measurementî, held in Hungary in August. This brought together a large
number of experts in the fields of vision, measurement, signalling and
imaging, to discuss issues relating to the perception and measurement of
light sources and images whose properties vary with time or space ........

........The symposium was followed by the annual meetings of CIE Divisions 1
and 2, commencing with a joint workshop session during which 4 topics of
common interest were reviewed: mesopic photometry; LEDs; colorimetry; and
measurement of flashing lights. ...... <snip

 

If you are interested in the subject see Schmidt-Clausens 'Historical
overview of Flashing Light Photometry' in the Report on the CIE
workshophotometry of Flashing Lights from here

http://physics.nist.gov/Divisions/Div844/facilities/photo/Publications/CIE_F
lash_Workshop.pdf

and follow the references through from the early days.

Blondel-Rey is still widely used/specified but it is not all that simple!

Darn, it's a dead link for me.

??