Driver to drive?

[vkj]

Thanks for all the helpful responses.

Yes, "frying bacon" sounds about right, tho its been a long time...

I forgot to mention that the switching rate is ~20Khz (50.2 us), and th
sample rate is 100.4 us.

The transformer is wound on a ETD59 core. I originally designed it usin
the usual design equations, (worked out to 53 prim. turns. turns and n=3.5
But this apparently saturated the core, resulting in blown MOSFETs even a
very light loads. I rewound with 140 T, n=3.5. That helped bring th
current upto 7.5A, tho the noise remained.

What Im really unable to understand is why does it work better in close
loop and fail in open loop?

Im thinking the crackling sound isnt responsible for the open loop failure
Probably the latter is due to the layout, as MooseFET points out. (I hav
mounted the transformer and choke off-board and wired up with twisted wire
<5".) But shielding the boards with alumimium sheeting didnt help.

How does one prevent conducted EMI? Im using 78xx regulated supplies wit
the usual 1uf tant. caps in parallel with hefty (2000uf) al. ones.

Thanks,

vkj

MooseFET wrote:

Sounds more like conducted EMI from the power section getting back into
the PIC. Layout, circuit architecture, hard to say without some pics. Of
course such interference can make the code execution go berserk, mess
with duty cycles and so on.

--
Regards, Joerg

http://www.analogconsultants.com/

"gmail" domain blocked because of excessive spam.
Use another domain or send PM.

 

[Ross Herbert]

On Fri, 25 Sep 2009 16:06:57 -0400, jeff_wisnia <jwisnia@dumpthisconversent.net>
wrote:

:
:My curious mind wants to learn the operating principle used in many
:imported automobile turn signal flashers, the kind which increase their
:flashing rate considerably when a turn signal bulb burns out. Their
:flashing rate is inversely proportional to the load. That seems like a
:good idea as it warns the driver that a bulb has gone s
uth.
:
:I had some Ss & Gs last night helping youngest son fix the turn signals
n his 95 Honda so he could pass state motor vehicle inspection. The
:right side turn signals, both front and back, were flashing way too fast
:and rather dimly too.
:
:The bulbs were the right spec and not burned out, so son soon reached
:the limit of his expertise and sought my help.
:
:The front turn signal bulbs were dual filament 1157s with the "bright"
:filament used for the turn signal and the "dimmer" one for the marker light.
:
:The problem turned out to be an open connection in the common (grounded)
:lead to the front right bulb socket.
:
:So, with the marker lamps off the load presented to the flasher from the
:right front lamp socket was the two filaments of that bulb in series,
:going to ground through the three paralleled marker lamp filaments on
:the remaibning three corners of his car.
:
:Fixing a corroded connection on the other end of the "bad" bulb socket's
:ground lead cured the problem.
:
:So, without my having to obtain and reverse engineer a flasher, what's
:inside it that makes its flashing rate inversely proportional to load?
:
:Thanks guys,
:
:Jeff


If you are referring to the older (but still very reliable) thermal-mechanical
type of flasher unit here is an explanation for its operation.
http://mgaguru.com/mgtech/electric/et104.htm

While this text states right at the end that if one bulb is blown the flasher
might not flash at all, this is not my experience. In all cases I have
encountered blowing one bulb simply causes a higher flash rate. The reason as
someone else has mentioned is, less current, less heat (but still sufficient to
flip the switch), and therefore less time to cool before the next heater cycle
starts, means faster flash rate.

 

[Speeders & Drunk Drivers]

"John Fields" <jfields@austininstruments.com> wrote in message news:6opvb5l27upk1u2ut4qpokhr586j3dlmdh@4ax.com...

On Sat, 26 Sep 2009 17:48:21 -0700, Archimedes' Lever
OneBigLever@InfiniteSeries.Org> wrote:

On Sat, 26 Sep 2009 15:51:08 -0700, "Speeders & Drunk Drivers are
MURDERERS" <xeton2001@yahoo.com> wrote:

BULLSHIT! My MOSFET's went even farther than this shit, yup mine are in sub NanoOhm. No heat, they blow my 36V 150watts light bulbs twice, no heat on the MOSFET, no death affect like your MOSFETs under constant current. A thumb size TO-220 can produce 1.2kw of switching power.



NXP claims world's first sub 1 milliOhm MOSFET in a Power S08 ...

Jul 8, 2009 ... NXP Semiconductors has unveiled the world's first n-channel sub 1 milliOhm 25 V MOSFET, PSMN1R2-25YL, and is claiming the lowest ever RDSon ...


YOUR MOSFETs (no apostrophe, idiot)?

What company do YOU make or design MOSFETs for?

Otherwise, it is you that is full of shit.

---
Indeed.

Just thinking about what he's proposing against what can actually be
done with ohmic material leads to the conclusion that he is, indeed,
full of shit.

Here are the proofs of why you jerks are real stupid:

1) You believe in something that you shouldn't be believing such as the hype of the new Chevy Volt 200 MPG, Even a light hybrid Honda/Toyota hybrid can't make it above 50mpg especially under your fat asses, you got to do some trick to go above 50mpg. Now a new heavy weight called Volt claiming to hit 200mpg, that's the real shit there.

2) What happens to your hype to send men to Mars in 2004 by your fucking BUSH? See, the whole thing is dead like I said back then.

3) I have tangible truth about everything I said here, it's your own problem for lacking education. You have nothing but bogus formulas, stupid beliefs in bogus things such as WMD in Iraq, Rosy economy, then the whole thing collapse. That's why I never care to give you respect. You judgments are so dirt low as usual. I would be stupid if I reveal anything new to you in technologies..



NOW FLUSH ALL OF YOU LOW-LIFE AMERICAN JERKS!!

 

[Archimedes' Lever]

On Mon, 28 Sep 2009 00:22:20 -0700, "Speeders & Drunk Drivers are
MURDERERS" <xeton2001@yahoo.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message news:6opvb5l27upk1u2ut4qpokhr586j3dlmdh@4ax.com...
On Sat, 26 Sep 2009 17:48:21 -0700, Archimedes' Lever
OneBigLever@InfiniteSeries.Org> wrote:

On Sat, 26 Sep 2009 15:51:08 -0700, "Speeders & Drunk Drivers are
MURDERERS" <xeton2001@yahoo.com> wrote:

BULLSHIT! My MOSFET's went even farther than this shit, yup mine are in sub NanoOhm. No heat, they blow my 36V 150watts light bulbs twice, no heat on the MOSFET, no death affect like your MOSFETs under constant current. A thumb size TO-220 can produce 1.2kw of switching power.



NXP claims world's first sub 1 milliOhm MOSFET in a Power S08 ...

Jul 8, 2009 ... NXP Semiconductors has unveiled the world's first n-channel sub 1 milliOhm 25 V MOSFET, PSMN1R2-25YL, and is claiming the lowest ever RDSon ...


YOUR MOSFETs (no apostrophe, idiot)?

What company do YOU make or design MOSFETs for?

Otherwise, it is you that is full of shit.

---
Indeed.

Just thinking about what he's proposing against what can actually be
done with ohmic material leads to the conclusion that he is, indeed,
full of shit.





Here are the proofs of why you jerks are real stupid:

1) You believe in something that you shouldn't be believing such as the hype of the new Chevy Volt 200 MPG, Even a light hybrid Honda/Toyota hybrid can't make it above 50mpg especially under your fat asses, you got to do some trick to go above 50mpg. Now a new heavy weight called Volt claiming to hit 200mpg, that's the real shit there.

2) What happens to your hype to send men to Mars in 2004 by your fucking BUSH? See, the whole thing is dead like I said back then.

3) I have tangible truth about everything I said here, it's your own problem for lacking education. You have nothing but bogus formulas, stupid beliefs in bogus things such as WMD in Iraq, Rosy economy, then the whole thing collapse. That's why I never care to give you respect. You judgments are so dirt low as usual. I would be stupid if I reveal anything new to you in technologies..



NOW FLUSH ALL OF YOU LOW-LIFE AMERICAN JERKS!!


Answer the question, Bozo.

 

[Fred Bartoli]

Jim Thompson a écrit :

On Sat, 26 Sep 2009 12:23:57 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

Jim Thompson wrote:
On Sat, 26 Sep 2009 11:09:43 GMT, nico@puntnl.niks (Nico Coesel)
wrote:

Bill Sloman <bill.sloman@ieee.org> wrote:

On Sep 25, 6:13=A0pm, Jim Thompson <To-Email-Use-The-Envelope-I...@My-
Web-Site.com> wrote:
Anyone have clever ideas for rectifying a 500MHz sine wave, amplitude
say 50mV to 500mV peak-to-peak?

Half wave is OK.

1mV accuracy is needed :-(

Process is X-Fab XB06.
Barrie Gilbert has had some ideas. His AD834

http://www.analog.com/static/imported-files/data_sheets/AD834.pdf

could be used to square your 500MHz signal, which automatically
rectifies it, though it leaves you with a lot of 1GHz ripple.

If you wanted to do something cuter, you could phase-lock a nominally
1GHz voltage-controlled logic level oscillator to the 500MHz signal,
and use it to generate two 500MHz signals mutually in quadrature -
nominally square waves, but at least with well-defined amplitudes, and
form in-phase and quadrature products.

In a second order phase-locked loop, the quadrature output is
integrated to control the VCO such that the quadrature output is
precisely in quadrature with the incoming signal while the in-phase
output can be used to drive another product detector (aka multiplier)
whch gives you your rectified output.
Of course, see my WVB receiver (on my website, SED page), dated 1974.

Just ducky when you have ample headroom (ą5V supplies). I have a
single supply, minimum operating at +2.7V

And Gilbert cells aren't all that accurate without lots of voltage an
on-chip trimming... I need accuracy at small signals.

How about a s&h, a 7 bit ADC, peak hold register and a 6 bit DAC?
Dream on ;-)

...Jim Thompson
I like the electrical substitution idea already suggested (two diodes,
drive one with DC to null out the signal from the other). How about
ping-ponging a couple of them (say 75% duty cycle each), and measuring
the offsets in between? You could measure the delta gain while they're
both on (25% of the time) and the offsets when one or the other is off.
With 75% duty cycle, they wouldn't ever be off together.

Cheers

Phil Hobbs

I'm sort of "ping-ponging" (diode current) to get chip (and external)
temperatures. At 500MHz capacitance screws up rectification accuracy
at low levels (BiCMOS process).

Uh... Why don't you get it simple?
Have your rectified level constant and a VCA in a feedback loop.


--
Thanks,
Fred.

 

[Bill Sloman]

On Sep 28, 2:23 am, John Larkin
<jjlar...@highNOTlandTHIStechnologyPART.com> wrote:

On Sun, 27 Sep 2009 16:37:43 -0700 (PDT),Bill Sloman





bill.slo...@ieee.org> wrote:
On Sep 27, 9:24 pm, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Sun, 27 Sep 2009 11:44:52 -0700 (PDT),Bill Sloman

bill.slo...@ieee.org> wrote:
On Sep 27, 6:29 pm, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Sun, 27 Sep 2009 03:55:25 -0700 (PDT),Bill Sloman

bill.slo...@ieee.org> wrote:
On Sep 27, 2:02 am, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Sat, 26 Sep 2009 15:54:37 -0700 (PDT),Bill Sloman

bill.slo...@ieee.org> wrote:
On Sep 26, 4:52 pm, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Sat, 26 Sep 2009 00:27:41 -0400, "Martin Riddle"

martin_...@verizon.net> wrote:
http://blog.heritage.org/2009/06/29/an-inconvenient-voice-dr-alan-car...

Cheers

How would a lawyer and community organizer know the real truth about
anything?

Listen to the best available advice? Dubbya was exposed to the same
quality of advice, but chose to ignore advice that he found
inconvenient or distasteful.

You have shown signs of a similar problem.

Idiot. You know nothing about my life except that I have a job and
design good electronics. I know nothing about your life except that
you don't, and you don't.

There you go. You know that I haven't got a job because I've told you.
You know very little about the electronics I've designed because
you've seen very little of it, but despite this you are willing to
claim that I don't design good electronics.

Post something and show us. Something not 20 years old.

Since I'm complaining that you don't draw logical conclusions from the
evidence available, it would be waste of time for me to present you
with evidence for a proposition that obviously wouldn't take your
fancy.

Convenient evasion. You'd rather talk about climate and economics,
untestable studies where you can cite other peoples' "peer reviewed"
work as evidence of your intelligence and fuel for insults. How
dreary.

And what's wrong with twenty year old circuits? You seem to boast
about developing the same kind of stuff I was doing thirty years ago -
since then the  bleeding edge of technology has moved on a bit so your
stuff goes a bit faster, but you don't - for instance - claim to be
using the sort of auto-calibration tricks that we were using back then

You conclude that we don't use autocal from the fact that I don't talk
much about autocal?

See any trimpots?

ftp://jjlarkin.lmi.net/DSC01786.JPG

The SO-8 under the eprom socket is a serial eeprom. It holds the
serial number, dash number, and the cal table, full of polynomials and
tempco factors and such. All this sort of stuff is obvious and
mandatory these days, not to mention tedious, so there's not a lot to
say about it.

That's not auto calibration, that's just replacing trim pots and screw
drivers with digital pots

none of them, either

I was using "digital pot" in th broad sense of a device with a
programmable impedance, in the same sense that "trim pots" in this
kind of context has to include trimming capacitors and moveable slugs
in inductors.

and an eprom programmer.

The eprom holds the code, same for all units. The cal factors and
serial number and options mask are in serial eeprom.

Autocalibration is
where the circuit monitors its own off-sets and delays and reprograms
the equivalent of your serial eprom every few minutes (or whenever).

Genuine calibration has to be tracable to - in the USA - NIST primary
standards.

So what. This sin't the kind of calibration that I was talking about.

No device can calibrate itself.

Why not? If it were to include a primary standard it could certainly
do just that.

Few devices can afford to
stop working whenever they feel like and re-zero or linearize
themselves; customers wouldn't like that, and we *do* have customers.

This obviously depends on application, and on how fast the re-
calibration can be done. I once put togheter a scheme where we should
have been able to measure all the 128 fine time delays we could
generate within one millisecond

Some things can get done quietly in background, like tempco tweaks,
but the intervention must not compromise signal quality. It's better
to design stuff that doesn't drift much, which isn't real hard these
days.

What's the non-temperature-sensitive equivalent of the MC100E195

http://www.onsemi.com/pub_link/Collateral/MC10E195-D.PDF

For the record, I did the concept, the architecture, the target specs,
schematic, the firmware, the cal procedure/firmware/PC software, and
the manual myself. I worked with two other people on the FPGA and the
pcb layout. One of my resolves in life is to never have to drive the
ghastly Xilinx software myself. No cuts, no jumpers, no breadboard, no
prototype: rev A works.

Sure. I've done all of that, and laid out a one or two printed circuit
boards as well. Am I supposed to be impressed?

I myself hate writing manuals, and know at least one guy who is
brilliant at it. At least he was brilliant at it when I knew him in
Cambridge, when I managed to get him the job of writing the manual
that my boss wanted me to write.

http://www.interface.co.uk/

I haven't written any software worth talking about since 1976, though
I've tinkered with other people's code once or twice since then, but I
don't have any problem with assembler and programming programmable
logic devices.

This arbitrary waveform generator also has BIST - note the relays -
the coding of which was pretty tedious. Hardly cocktail party
conversation.

Relays? Couldn't you use some kind of analog switch? Relays do have
their virtues, but they are big.

These aren't very big. Their on/off ratio can't be touched by any
semiconductor I know of. Zero failures so far, too.

The on-off ratios can be very good. The life-time is finite, but 10^7
operations is often enough, and there ae always mercury wetted reed
relays if you need 10^8.

I designed this dc/dc inverter for this project

ftp://jjlarkin.lmi.net/Inverter.jpg

which was fun because it's "real circuit design", not just plugging in
a commercial regulator chip. I did breadboard this bit.

Pretty crude. You use the +5V rail plus the Vbe of Q1 as your voltage
reference.

It's not crude, it's elegant.

A 5V rail is never an elegant voltage reference, and throwing in an
uncompensated Vbe doesn't improve it.

Max duty cycle is controlled by design,
it's dead stable, and load regulation and efficiency are excellent.
It's fine for its purpose, which is powering opamps.

Show us a switcher you've designed, and we'll grade its
sophistication.

That you think that the circuit you posted is "elegant" confirms my
comments about the self-gratifying nature of your "judgement". Your
conclusions about the sophistication of any circuit I might produce
are a little too predictable.

You could check out the switch-mode curent drive that I published in
Measurment Science and Technology back in 1996 - Meas. Sci. Technol. 7
(1996) 1653–1664 "A microcontroller-based driver to stabilize the
temperature of an optical stage to within 1 mK in the range 4–38 C,
using a Peltier heat pump
and a thermistor sensor" by A W Slomany, Paul Buggs, James Molloy and
Douglas Stewart.

The switched mode driver than can send up to 3A through the Peltier
junction has an element of sophistication.

What made it necessary to "design" this rather than finding a
commercial regulator chip?

Positive-to-negative inverters are rare, especially at 12 volts and
close to an amp. And I did it because I enjoyed it.

A rather perverse pleasure, considering the result.

--
Bill Sloman, Nijmegen

 

[John Fields]

On Mon, 28 Sep 2009 00:22:20 -0700, "Speeders & Drunk Drivers are
MURDERERS" <xeton2001@yahoo.com> wrote:

"John Fields" <jfields@austininstruments.com> wrote in message news:6opvb5l27upk1u2ut4qpokhr586j3dlmdh@4ax.com...
On Sat, 26 Sep 2009 17:48:21 -0700, Archimedes' Lever
OneBigLever@InfiniteSeries.Org> wrote:

On Sat, 26 Sep 2009 15:51:08 -0700, "Speeders & Drunk Drivers are
MURDERERS" <xeton2001@yahoo.com> wrote:

BULLSHIT! My MOSFET's went even farther than this shit, yup mine are in sub NanoOhm. No heat, they blow my 36V 150watts light bulbs twice, no heat on the MOSFET, no death affect like your MOSFETs under constant current. A thumb size TO-220 can produce 1.2kw of switching power.



NXP claims world's first sub 1 milliOhm MOSFET in a Power S08 ...

Jul 8, 2009 ... NXP Semiconductors has unveiled the world's first n-channel sub 1 milliOhm 25 V MOSFET, PSMN1R2-25YL, and is claiming the lowest ever RDSon ...


YOUR MOSFETs (no apostrophe, idiot)?

What company do YOU make or design MOSFETs for?

Otherwise, it is you that is full of shit.

---
Indeed.

Just thinking about what he's proposing against what can actually be
done with ohmic material leads to the conclusion that he is, indeed,
full of shit.





Here are the proofs of why you jerks are real stupid:

1) You believe in something that you shouldn't be believing such as the hype of the new Chevy Volt 200 MPG, Even a light hybrid Honda/Toyota hybrid can't make it above 50mpg especially under your fat asses, you got to do some trick to go above 50mpg. Now a new heavy weight called Volt claiming to hit 200mpg, that's the real shit there.

---
http://money.cnn.com/2009/08/11/autos/volt_mpg/
---

2) What happens to your hype to send men to Mars in 2004 by your fucking BUSH? See, the whole thing is dead like I said back then.

---
He overestimated our capabilities?

We've got the next best thing up there, though, while you can't even
sell generators on Ebay. Get your own shit in order before you start
criticizing others, asshole.
---

3) I have tangible truth about everything I said here, it's your own problem for lacking education.

---
Ok, then, explain this to me:

How long would a piece of #40AWG magnet wire have to be to measure 1e-9
ohm (that's one nano ohm) at 25C?
---

You have nothing but bogus formulas,

---
What do you think got us to the moon and allows you to post your insane
drivel to USENET?

Magic?
---

stupid beliefs in bogus things such as WMD in Iraq, Rosy economy, then the whole thing collapse.

---
We don't all believe that; in fact I don't believe _most_ of us do.
---

That's why I never care to give you respect.

---
What you're doing isn't showing a lack of respect, it's overcompensating
for your own inadequacies by attacking the group of people who point out
them out, undeniably.
---

You judgments are so dirt low as usual.

---
That, of course, lets you off the hook and allows you to think that our
criticism of you is invalid.
---

I would be stupid if I reveal anything new to you in technologies..

---
You're stupid anyway, and revealing anything new in technology wouldn't
make you any less stupid.

Besides, you don't have anything "new" to reveal, and never will, so
that's just more of your incessant bullshit.
---

NOW FLUSH ALL OF YOU LOW-LIFE AMERICAN JERKS!!

---
Geez, if you hate us so much, why don't you just leave and go somewhere
where you'll be happy?

Oh, I remember now, you blame your kids for not letting you leave...

That's typical of despicable people like you who refuse to take
responsibility for themselves and blame everyone else for their
failures.

 

[John Fields]

On Sun, 27 Sep 2009 16:41:23 -0700 (PDT), Bill Sloman
<bill.sloman@ieee.org> wrote:

On Sep 27, 11:23 pm, krw <k...@att.bizzzzzzzzzzz> wrote:
On Sun, 27 Sep 2009 12:24:39 -0700, John Larkin





jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Sun, 27 Sep 2009 11:44:52 -0700 (PDT),Bill Sloman
bill.slo...@ieee.org> wrote:

On Sep 27, 6:29 pm, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Sun, 27 Sep 2009 03:55:25 -0700 (PDT),Bill Sloman

bill.slo...@ieee.org> wrote:
On Sep 27, 2:02 am, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Sat, 26 Sep 2009 15:54:37 -0700 (PDT),Bill Sloman

bill.slo...@ieee.org> wrote:
On Sep 26, 4:52 pm, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Sat, 26 Sep 2009 00:27:41 -0400, "Martin Riddle"

martin_...@verizon.net> wrote:
http://blog.heritage.org/2009/06/29/an-inconvenient-voice-dr-alan-car...

Cheers

How would a lawyer and community organizer know the real truth about
anything?

Listen to the best available advice? Dubbya was exposed to the same
quality of advice, but chose to ignore advice that he found
inconvenient or distasteful.

You have shown signs of a similar problem.

Idiot. You know nothing about my life except that I have a job and
design good electronics. I know nothing about your life except that
you don't, and you don't.

There you go. You know that I haven't got a job because I've told you.
You know very little about the electronics I've designed because
you've seen very little of it, but despite this you are willing to
claim that I don't design good electronics.

Post something and show us. Something not 20 years old.

Since I'm complaining that you don't draw logical conclusions from the
evidence available, it would be waste of time for me to present you
with evidence for a proposition that obviously wouldn't take your
fancy.

Convenient evasion. You'd rather talk about climate and economics,
untestable studies where you can cite other peoples' "peer reviewed"
work as evidence of your intelligence and fuel for insults. How
dreary.

And what's wrong with twenty year old circuits? You seem to boast
about developing the same kind of stuff I was doing thirty years ago -
since then the  bleeding edge of technology has moved on a bit so your
stuff goes a bit faster, but you don't - for instance - claim to be
using the sort of auto-calibration tricks that we were using back then

You conclude that we don't use autocal from the fact that I don't talk
much about autocal?

In fact, you have talked some about it.  As usual, Slowman lies.

As usual, krw doesn't know what he is talking about. If I were to ask
him to produce evidence to support his claim he'd come up as empty as
he always does.

---
Instead of evasion and bullshit, why don't you just post something
clever you've designed, or STFU?

 

[Jim Thompson]

On Mon, 28 Sep 2009 08:38:30 -0500, John Fields
<jfields@austininstruments.com> wrote:

On Mon, 28 Sep 2009 00:22:20 -0700, "Speeders & Drunk Drivers are
MURDERERS" <xeton2001@yahoo.com> wrote:


"John Fields" <jfields@austininstruments.com> wrote in message news:6opvb5l27upk1u2ut4qpokhr586j3dlmdh@4ax.com...
On Sat, 26 Sep 2009 17:48:21 -0700, Archimedes' Lever
OneBigLever@InfiniteSeries.Org> wrote:

On Sat, 26 Sep 2009 15:51:08 -0700, "Speeders & Drunk Drivers are
MURDERERS" <xeton2001@yahoo.com> wrote:

BULLSHIT! My MOSFET's went even farther than this shit, yup mine are in sub NanoOhm. No heat, they blow my 36V 150watts light bulbs twice, no heat on the MOSFET, no death affect like your MOSFETs under constant current. A thumb size TO-220 can produce 1.2kw of switching power.



NXP claims world's first sub 1 milliOhm MOSFET in a Power S08 ...

Jul 8, 2009 ... NXP Semiconductors has unveiled the world's first n-channel sub 1 milliOhm 25 V MOSFET, PSMN1R2-25YL, and is claiming the lowest ever RDSon ...


YOUR MOSFETs (no apostrophe, idiot)?

What company do YOU make or design MOSFETs for?

Otherwise, it is you that is full of shit.

---
Indeed.

Just thinking about what he's proposing against what can actually be
done with ohmic material leads to the conclusion that he is, indeed,
full of shit.





Here are the proofs of why you jerks are real stupid:

1) You believe in something that you shouldn't be believing such as the hype of the new Chevy Volt 200 MPG, Even a light hybrid Honda/Toyota hybrid can't make it above 50mpg especially under your fat asses, you got to do some trick to go above 50mpg. Now a new heavy weight called Volt claiming to hit 200mpg, that's the real shit there.

---
http://money.cnn.com/2009/08/11/autos/volt_mpg/
---

2) What happens to your hype to send men to Mars in 2004 by your fucking BUSH? See, the whole thing is dead like I said back then.

---
He overestimated our capabilities?

We've got the next best thing up there, though, while you can't even
sell generators on Ebay. Get your own shit in order before you start
criticizing others, asshole.
---

3) I have tangible truth about everything I said here, it's your own problem for lacking education.

---
Ok, then, explain this to me:

How long would a piece of #40AWG magnet wire have to be to measure 1e-9
ohm (that's one nano ohm) at 25C?
---

You have nothing but bogus formulas,

---
What do you think got us to the moon and allows you to post your insane
drivel to USENET?

Magic?
---

stupid beliefs in bogus things such as WMD in Iraq, Rosy economy, then the whole thing collapse.

---
We don't all believe that; in fact I don't believe _most_ of us do.
---

That's why I never care to give you respect.

---
What you're doing isn't showing a lack of respect, it's overcompensating
for your own inadequacies by attacking the group of people who point out
them out, undeniably.
---

You judgments are so dirt low as usual.

---
That, of course, lets you off the hook and allows you to think that our
criticism of you is invalid.
---

I would be stupid if I reveal anything new to you in technologies..

---
You're stupid anyway, and revealing anything new in technology wouldn't
make you any less stupid.

Besides, you don't have anything "new" to reveal, and never will, so
that's just more of your incessant bullshit.
---

NOW FLUSH ALL OF YOU LOW-LIFE AMERICAN JERKS!!

---
Geez, if you hate us so much, why don't you just leave and go somewhere
where you'll be happy?

Oh, I remember now, you blame your kids for not letting you leave...

That's typical of despicable people like you who refuse to take
responsibility for themselves and blame everyone else for their
failures.

See SIG...

...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |

Postings via gmail, yahoo, hotmail, aioe, uar or googlegroups, and
trolls/feeders, are now automatically kill-filed using Agent v5.0

To be white-listed, send request via the E-mail icon on my website

 

[John Larkin]

On Mon, 28 Sep 2009 04:35:22 -0700 (PDT), Bill Sloman
<bill.sloman@ieee.org> wrote:

On Sep 28, 2:23 am, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Sun, 27 Sep 2009 16:37:43 -0700 (PDT),Bill Sloman





bill.slo...@ieee.org> wrote:
On Sep 27, 9:24 pm, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Sun, 27 Sep 2009 11:44:52 -0700 (PDT),Bill Sloman

bill.slo...@ieee.org> wrote:
On Sep 27, 6:29 pm, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Sun, 27 Sep 2009 03:55:25 -0700 (PDT),Bill Sloman

bill.slo...@ieee.org> wrote:
On Sep 27, 2:02 am, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Sat, 26 Sep 2009 15:54:37 -0700 (PDT),Bill Sloman

bill.slo...@ieee.org> wrote:
On Sep 26, 4:52 pm, John Larkin
jjlar...@highNOTlandTHIStechnologyPART.com> wrote:
On Sat, 26 Sep 2009 00:27:41 -0400, "Martin Riddle"

martin_...@verizon.net> wrote:
http://blog.heritage.org/2009/06/29/an-inconvenient-voice-dr-alan-car...

Cheers

How would a lawyer and community organizer know the real truth about
anything?

Listen to the best available advice? Dubbya was exposed to the same
quality of advice, but chose to ignore advice that he found
inconvenient or distasteful.

You have shown signs of a similar problem.

Idiot. You know nothing about my life except that I have a job and
design good electronics. I know nothing about your life except that
you don't, and you don't.

There you go. You know that I haven't got a job because I've told you.
You know very little about the electronics I've designed because
you've seen very little of it, but despite this you are willing to
claim that I don't design good electronics.

Post something and show us. Something not 20 years old.

Since I'm complaining that you don't draw logical conclusions from the
evidence available, it would be waste of time for me to present you
with evidence for a proposition that obviously wouldn't take your
fancy.

Convenient evasion. You'd rather talk about climate and economics,
untestable studies where you can cite other peoples' "peer reviewed"
work as evidence of your intelligence and fuel for insults. How
dreary.

And what's wrong with twenty year old circuits? You seem to boast
about developing the same kind of stuff I was doing thirty years ago -
since then the  bleeding edge of technology has moved on a bit so your
stuff goes a bit faster, but you don't - for instance - claim to be
using the sort of auto-calibration tricks that we were using back then

You conclude that we don't use autocal from the fact that I don't talk
much about autocal?

See any trimpots?

ftp://jjlarkin.lmi.net/DSC01786.JPG

The SO-8 under the eprom socket is a serial eeprom. It holds the
serial number, dash number, and the cal table, full of polynomials and
tempco factors and such. All this sort of stuff is obvious and
mandatory these days, not to mention tedious, so there's not a lot to
say about it.

That's not auto calibration, that's just replacing trim pots and screw
drivers with digital pots

none of them, either

I was using "digital pot" in th broad sense of a device with a
programmable impedance, in the same sense that "trim pots" in this
kind of context has to include trimming capacitors and moveable slugs
in inductors.

Don't use them on this design, rarely ever. Most cals are pure
digital, in the FPGA. Some analog offset type things use dacs. The
only "variable impedance" things we commonly use are varicaps.

I've been searching for a good wideband (true DC to a GHz or so)
programmable attenuator, but nothing wonderful so far.

and an eprom programmer.

The eprom holds the code, same for all units. The cal factors and
serial number and options mask are in serial eeprom.

Autocalibration is
where the circuit monitors its own off-sets and delays and reprograms
the equivalent of your serial eprom every few minutes (or whenever).

Genuine calibration has to be tracable to - in the USA - NIST primary
standards.

So what. This sin't the kind of calibration that I was talking about.

No device can calibrate itself.

Why not? If it were to include a primary standard it could certainly
do just that.

You've suggested that before. How do I add primary standards to a
20-square-inch board that sells for a few K$? Hell, I could sell that
part alone for $100K.

Few devices can afford to
stop working whenever they feel like and re-zero or linearize
themselves; customers wouldn't like that, and we *do* have customers.

This obviously depends on application, and on how fast the re-
calibration can be done. I once put togheter a scheme where we should
have been able to measure all the 128 fine time delays we could
generate within one millisecond

One millisecond timeout is planty enough to make a product useless, or
dangerous. One nanosecond could, ditto.

Some things can get done quietly in background, like tempco tweaks,
but the intervention must not compromise signal quality. It's better
to design stuff that doesn't drift much, which isn't real hard these
days.

What's the non-temperature-sensitive equivalent of the MC100E195

http://www.onsemi.com/pub_link/Collateral/MC10E195-D.PDF

The Micrel parts are much better, but still but have TCs that vary
with programmed delay. But the compensations have to be non-intrusive
on continuous signal processing... no timeouts, no tap switching
allowed.

For the record, I did the concept, the architecture, the target specs,
schematic, the firmware, the cal procedure/firmware/PC software, and
the manual myself. I worked with two other people on the FPGA and the
pcb layout. One of my resolves in life is to never have to drive the
ghastly Xilinx software myself. No cuts, no jumpers, no breadboard, no
prototype: rev A works.

Sure. I've done all of that, and laid out a one or two printed circuit
boards as well. Am I supposed to be impressed?

I myself hate writing manuals, and know at least one guy who is
brilliant at it. At least he was brilliant at it when I knew him in
Cambridge, when I managed to get him the job of writing the manual
that my boss wanted me to write.

http://www.interface.co.uk/

I haven't written any software worth talking about since 1976, though
I've tinkered with other people's code once or twice since then, but I
don't have any problem with assembler and programming programmable
logic devices.

This arbitrary waveform generator also has BIST - note the relays -
the coding of which was pretty tedious. Hardly cocktail party
conversation.

Relays? Couldn't you use some kind of analog switch? Relays do have
their virtues, but they are big.

These aren't very big. Their on/off ratio can't be touched by any
semiconductor I know of. Zero failures so far, too.

The on-off ratios can be very good. The life-time is finite, but 10^7
operations is often enough, and there ae always mercury wetted reed
relays if you need 10^8.

Mercury is illegal these days, and DPDT mercury relays were never
plentiful. Many were position sensitive. The little telecom relays are
small, cheap, and very reliable. The latching types have unmeasurable
thermal offsets; reeds are rotten thermally.

I designed this dc/dc inverter for this project

ftp://jjlarkin.lmi.net/Inverter.jpg

which was fun because it's "real circuit design", not just plugging in
a commercial regulator chip. I did breadboard this bit.

Pretty crude. You use the +5V rail plus the Vbe of Q1 as your voltage
reference.

It's not crude, it's elegant.

A 5V rail is never an elegant voltage reference, and throwing in an
uncompensated Vbe doesn't improve it.

How do you get to make statements like that?

Max duty cycle is controlled by design,
it's dead stable, and load regulation and efficiency are excellent.
It's fine for its purpose, which is powering opamps.

Show us a switcher you've designed, and we'll grade its
sophistication.

That you think that the circuit you posted is "elegant" confirms my
comments about the self-gratifying nature of your "judgement". Your
conclusions about the sophistication of any circuit I might produce
are a little too predictable.

Show us.

You could check out the switch-mode curent drive that I published in
Measurment Science and Technology back in 1996 - Meas. Sci. Technol. 7
(1996) 1653–1664 "A microcontroller-based driver to stabilize the
temperature of an optical stage to within 1 mK in the range 4–38 C,
using a Peltier heat pump
and a thermistor sensor" by A W Slomany, Paul Buggs, James Molloy and
Douglas Stewart.

Post it somewhere.

The switched mode driver than can send up to 3A through the Peltier
junction has an element of sophistication.

Gosh. 3 amps.

What made it necessary to "design" this rather than finding a
commercial regulator chip?

Positive-to-negative inverters are rare, especially at 12 volts and
close to an amp. And I did it because I enjoyed it.

A rather perverse pleasure, considering the result.

Do I have to give all the money back?

John

 

[Richard the Dreaded Liber]

On Sat, 26 Sep 2009 08:04:29 -0700, Bob Eld wrote:

"Jim Thompson" <To-Email-Use-The-Envelope-Icon@My-Web-Site.com> wrote in

He's using it as a ceiling fan.

How special, the teabagging republican nitwits are have a pud pulling circle
jerk over a lame racist joke. Oh, how clever! Are you rocket scientists down
to the short strokes yet?

And another socialist dupe pulls out the race card completely unprovoked.

Thanks for once again verifying the level of stupidity in your ranks.

Albeit I _do_ find it interesting that JT, dyed-in-the-wool neocon, is so
eager to buy into the socialist security system, _especially_ when he has
the means to pay his own damn bills!

Cheers!
Rich

 

[Richard the Dreaded Liber]

On Sun, 27 Sep 2009 09:17:15 -0700, John Larkin wrote:

On Sat, 26 Sep 2009 11:17:02 -0700 (PDT), dagmargoodboat@yahoo.com
On Sep 26, 10:52 am, John Larkin
On Sat, 26 Sep 2009 00:27:41 -0400, "Martin Riddle"

martin_...@verizon.net> wrote:
http://blog.heritage.org/2009/06/29/an-inconvenient-voice-dr-alan-car...

How would a lawyer and community organizer know the real truth about
anything?

During the election campaign I went to ACORN's website. They were
still touting their ability to get you an affordable mortgage whether
you qualified or not. They were pretty blunt about it, and
shameless. Might've saved a snapshot somewhere...

Where are all tne investigative reporters? On vacation? Hiding under
beds?

Well, there's Steven Greenhut, but he's only going to Sacramento.
http://www.ocregister.com/ocregister/sections/opinion/columns/stevegreenhut/

But hey! One is infinitely more than zero!

Cheers!
Rich

 

[Rich Grise]

On Sat, 26 Sep 2009 07:50:43 -0700, John Larkin wrote:

On Sat, 26 Sep 2009 18:24:05 +1000, "David L. Jones"

A PC based digital logic analyser. Combined LA's in digital oscilloscopes
can be handy, but USB ones offer better bang-per-buck.

I've never used a logic analyzer. A digital scope can spot the obvious
glitch-type errors, and all a LA does after that is force you to do
the thinking you should have done in the first place. They take so
much time to connect and use, it's a lot quicker and easier to just
think.

One can be indispensable if you're trouble-shooting somebody _else_'s
design. And if I'm getting paid by the hour, what do I care how long it
takes to hook up? ;-)

But I'm only a tech, what do I know? ;-)

When I was interviewing for the video game/pinball/jukebox repair job,
I told the guy, "Well, when a game gets fixed, it has to be tested, and
where else would I be able to play games for free? ;-)"

I got the job.

Cheers!
Rich

 

[Rich Grise]

On Fri, 25 Sep 2009 17:23:09 -0700, John Larkin wrote:

On Fri, 25 Sep 2009 16:58:08 -0700 (PDT), Too_Many_Tools

If you were going to equipt a home test bench today for both analog
and digital work, what test equipment would you choose and why?

TMT

Something like this:

ftp://jjlarkin.lmi.net/DSC01371.JPG

Wow! Paper towels _and_ Kimwipes!

Lah-di-dah!

BTW, do you buy the "select-a-size" towels?

Cheers!
Rich

 

[Richard the Dreaded Liber]

On Fri, 25 Sep 2009 22:33:03 -0400, Les Cargill wrote:

Richard the Dreaded Libertarian wrote:
http://www.dilbert.com/fast/2009-09-25/

Stupid has no political affiliation. If you made a
scatter plot out of it, the correlation would not support
the hypothesis.

Stupid is far too universal to respect such narrow categories.
Stupid has Bandwidth. it is palpable.

My parents are liberals. And they are mostly smart folks,

Well, I will grant you, at one point in time "liberal" had something
to do with "Liberty". But it seems that these days it means "socialist".

Remember the "bleeding hearts"? They wanted to take care of _everybody_,
the unfortunate as well as the lazy and negligent, using _your_ money.

That's not for me, thanks.

Cheers!
Rich

 

[Nico Coesel]

Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:

John Larkin wrote:
On Sat, 26 Sep 2009 16:17:44 -0400, Phil Hobbs
pcdhSpamMeSenseless@electrooptical.net> wrote:

John Larkin wrote:
On Sat, 26 Sep 2009 14:05:08 -0400, Rich Webb
bbew.ar@mapson.nozirev.ten> wrote:

On Sat, 26 Sep 2009 07:50:43 -0700, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:
logic and such.

John


I used to do most of my funky timing things with a little box containing
a 24-pin narrow DIP socket and a bunch of SMB connectors. I'd draw the
timing, burn a 22V10, and press on to the next problem. Orcad PLD V for
DOS--good medicine.

I'll have to see if I can find a decent programmer (preferably
dac-per-pin) for cheapish. My old one was an Advin Pilot. Any suggestions?

The Galep4 or 5 from Conitec (www.conitec.de). These programmers will
program anything! And they have excellent support. I think my Galep3
is close to 15 years old but it is still supported by their software
today.

--
Failure does not prove something is impossible, failure simply
indicates you are not using the right tools...
"If it doesn't fit, use a bigger hammer!"
--------------------------------------------------------------

 

[Jamie]

Rich Grise wrote:

On Fri, 25 Sep 2009 17:23:09 -0700, John Larkin wrote:

On Fri, 25 Sep 2009 16:58:08 -0700 (PDT), Too_Many_Tools


If you were going to equipt a home test bench today for both analog
and digital work, what test equipment would you choose and why?

TMT

Something like this:

ftp://jjlarkin.lmi.net/DSC01371.JPG


Wow! Paper towels _and_ Kimwipes!

Lah-di-dah!

BTW, do you buy the "select-a-size" towels?

Cheers!
Rich

Now I don't feel so bad that I got a 47x boom scope for the

bench!..

 

[Ouroboros Rex]

Jim Thompson wrote:

Latest version of the board game, Monopoly...

http://www.analog-innovations.com/SED/Bamopoly.jpg

Yep. Thanks, republicans!

 

[John Larkin]

On Sat, 26 Sep 2009 17:58:27 -0700, Archimedes' Lever
<OneBigLever@InfiniteSeries.Org> wrote:

On Sat, 26 Sep 2009 16:52:40 -0700, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:

On Sat, 26 Sep 2009 17:28:50 -0400, "Michael A. Terrell"
mike.terrell@earthlink.net> wrote:


John Larkin wrote:

There's the slideback technique: drive a comparator with RF on one
side, DC feedback on the other. Tease the DC appropriately.

I once made a slideback sampling oscilloscope, using tunnel diodes, as
my EE senior project. I won an award and had to attend a dreadful IEEE
chapter banquet and repeat it to a bunch of old-fart power engineers
who didn't understand a word I said. I described the slideback
sampling scope in this ng some years back and a certain party loved
the idea so much he later decided that he'd invented it himself.


http://store.americanmicrosemiconductor.com/diodes-tunnel-diodes.html

TDs are insanely expensive nowadays, ballpark $100. I used to get them
for a couple bucks from Allied. The fabrication process is insane, and
nobody ever modernized it.

There are some more modern planar germanium back diodes, essentially
low Ip tunnel diodes, but they're RF detectors, useless for switching.
Pity, I used to like tunnel diodes.

http://aeroflex.com/AMS/Metelics/pdfiles/MBD_Series_Planar_Back_Tunnel_Diodes.pdf

John


Try PiN diodes then.

For what? Certainly not switching, amplifying, oscillating, detection,
or mixing.

There was a single-TD circuit that was an RF amp, a local oscillator,
a mixer, and an IF amp. One TD and a couple of passives would make an
FM transmitter.

The beefier td's would make a voltage step with a 22 picosecond rise
time... in 1964.

John

 

[John Larkin]

On Sat, 26 Sep 2009 18:01:12 -0700, Archimedes' Lever
<OneBigLever@InfiniteSeries.Org> wrote:

On Sat, 26 Sep 2009 17:26:03 -0700, John Larkin
jjlarkin@highNOTlandTHIStechnologyPART.com> wrote:


Corian. Great stuff.


Not for electronic PCB work, dumbfuck.

Suitable for HV work, but NOT for ANY of the kind of stuff you claim to
make.

Your grasp of the things that matter always seems to ignore those
things that you were never smart enough to grasp the depth of. How
convenient for you. How sad for your customers.

You probably do not even know what the term 'infant mortality' means.

We see no evidence of a bathtub curve these days. Field failure rates
are low, far below MIL-217 or Bellcore calcs, and failures seem to be
pretty uniform over time. Most failures are because of some sort of
abuse.

John