Initializing a Flip-Flop on Power-up

[Jim Thompson]

On Fri, 17 Feb 2006 14:40:53 -0700, the renowned Jim Thompson
[snip]

I prefer a level detect with hysteresis AND delay... easy to do if the
chip design includes my bandgap reference ;-)

...Jim Thompson

How does your bandgap compare with published single/double bandgap
references? Curvature correction PTAT term added?

Of course. I've been designing bandgaps since BEFORE Widlar... just
didn't have the sense to publish... and my first OpAmp design is still
selling.

Last weeks version included a separate PTAT output used for measuring
temperature of the environment that the chip is in.

...Jim Thompson

 

[Joerg]

Hello Rich,

If you want to be persnickety about it, then Dan could see if there's a
spare gate in his 4093

Nothing persnickety about it. An RC slope on a 4013 input is not a good
idea. If it's the garage stereo and an occasional malfunction is
acceptable, then ok. If it was our living room stereo my wife would not
be enthused about that. "Now since you've tinkered with it last time is
often doesn't....".

Or, better yet, put the R/C on one of the 4093 inputs - I'd have to see
the existing circuit to see if that's doable.

That would do but most likely needs some diode 'poor man's logic'. Might
as well do the suggested transistor trick then, same cost.

Regards, Joerg

 

[Jim Thompson]

Hello Jim,


Makes me drool. Often I envy you guys, maybe I should get into chip
design some day. The few that I was involved in were lots of fun. But
the SW tools we used were freaking expensive and had a steep learning
curve even though someone else did the layout in all cases.

There was always that adrenaline rush during fab time. Will it work?

Had one last week. Customer verified my design on his own tool-set
(non-PSpice)... came out with wrong TC... likely culprit, bad models
:-(

What if the data input turns out to be deaf?
Naaaah!

What if we pushed the
design rules too far this time?

I NEVER do that.

Tossing and turning at night.

I've done a lot of that.

Luckily
they did work. Whew.

Regards, Joerg

...Jim Thompson

 

[Joerg]

Hello Jim,

I NEVER do that.

We had to, no choice there. The stuff had to go into a teeny catheter
tip and still be able to generate pulse power. Just imagine: Five chips
that have to be mounted on a flex circuit and rolled up into a tube that
is under 1.2mm in diameter and just a few millimeters long. Oh, and each
chip has over 30 reflow bump contacts and every one of them has to work,
on all five of them, or the whole thing has to be booked as production
scrap.

The only way to get that done is make them really small and push hard on
the design rules. The good thing is that the device is disposable and
usually not run more than an hour or so in a typical clinical setting.
Still, in the lab we ran some for years.

Look at a penny. The section of the rolled flex with the five chips in
there is about the size of the word "LIBERTY" on the coin. It
multiplexes 64 elements in synthetic aperture fashion, generates the
transmit pulses, amplifies the receive signals, does the T/R switching
and so on.

Regards, Joerg

 

[Rich Grise]

"Rich Grise" <[email protected]> schreef in bericht ....

No, what was it?

I quoted it, but you snipped it just to snipe at me.

Good-Bye.

 

[Mac]

Yeah, and the H-bridge was in charge of keeping the sattelite in orbit.

Gravity usually does a pretty good job of keeping satellites in orbit.
Some day we will have to go up there and de-orbit all the crap that has
accumulated over the years.

--Mac

 

[Frank Bemelman]

IIRC coffee is Douwe Egbert's mainstream product. But Frank would know
better, it's been two decades since I lived in the Netherlands. And I
always liked the other brand better, Kanis&Gunninck or something like

that.

Yes, coffee it is. 5 years ago Philips & DE dvelopped the Senseo
coffee maker. Absolutely brilliant product, makes a perfect cup of
coffee in less than 2 minutes, and the next one in less than a
minute.

http://www.senseo.com

 

[Spehro Pefhany]

that.

Yes, coffee it is. 5 years ago Philips & DE dvelopped the Senseo
coffee maker. Absolutely brilliant product, makes a perfect cup of
coffee in less than 2 minutes, and the next one in less than a
minute.

http://www.senseo.com

We got the Braun equivalent- "Tassimo" with the bar codes on the
so-called pods. It's a cool concept. The espresso is not quite as good
as using a real machine, but it's pretty good for how easy it is to
make. I do object to the "inkjet printer" aspect, where you are stuck
into buying their licensed cartridges.

http://www.tassimodirect.com/Tassimo/discover/the_works.aspx

My full size machine makes better espresso, automatically, and for a
fraction of the cost per cup, but it's probably cost 10-20 times as
much.

 

[Spehro Pefhany]

that.

Yes, coffee it is. 5 years ago Philips & DE dvelopped the Senseo
coffee maker. Absolutely brilliant product, makes a perfect cup of
coffee in less than 2 minutes, and the next one in less than a
minute.

http://www.senseo.com

As an aside here, why do web pages often have images such as the above
coffee maker broken up into more than one image? The coffee maker
image is split horizontally just below the cups.

Image 1: http://www.senseo.com/content/images/ph_kza1.gif
Image 2: http://www.senseo.com/content/images/ph_kza2.gif



Best regards,
Spehro Pefhany

 

[Frank Bemelman]

We got the Braun equivalent- "Tassimo" with the bar codes on the
so-called pods. It's a cool concept. The espresso is not quite as good
as using a real machine, but it's pretty good for how easy it is to
make. I do object to the "inkjet printer" aspect, where you are stuck
into buying their licensed cartridges.

Here in the Netherlands we can buy pods from other brands too, and
these are about 30% cheaper, but have the same quality of coffee
inside. But in Belgium you can only by DE brand pods.

http://www.tassimodirect.com/Tassimo/discover/the_works.aspx

My full size machine makes better espresso, automatically, and for a
fraction of the cost per cup, but it's probably cost 10-20 times as
much.

True, but these machines require a bit more work/maintance, and
take more space. I don't know how long my Senseo will last, it
is two years old now, and starts to make a bit more noise, after
an estimated 2500 cups of coffee. But I'd buy a new one in a
heartbeat.

 

[Fred Bloggs]

after
an estimated 2500 cups of coffee...

Your adrenal glands must be the size of a pea by now

 

[Rich Grise]

Hello Jim,

We had to, no choice there. The stuff had to go into a teeny catheter
tip and still be able to generate pulse power. Just imagine: Five chips
that have to be mounted on a flex circuit and rolled up into a tube that
is under 1.2mm in diameter and just a few millimeters long. Oh, and each
chip has over 30 reflow bump contacts and every one of them has to work,
on all five of them, or the whole thing has to be booked as production
scrap.

The only way to get that done is make them really small and push hard on
the design rules. The good thing is that the device is disposable and
usually not run more than an hour or so in a typical clinical setting.
Still, in the lab we ran some for years.

Look at a penny. The section of the rolled flex with the five chips in
there is about the size of the word "LIBERTY" on the coin. It
multiplexes 64 elements in synthetic aperture fashion, generates the
transmit pulses, amplifies the receive signals, does the T/R switching
and so on.

That's not _breaking_ the design rules, that's _writing new_ ones! ;-)

Cheers!
Rich

 

[Jim Thompson]

Hello Jim,


We had to, no choice there. The stuff had to go into a teeny catheter
tip and still be able to generate pulse power. Just imagine: Five chips
that have to be mounted on a flex circuit and rolled up into a tube that
is under 1.2mm in diameter and just a few millimeters long. Oh, and each
chip has over 30 reflow bump contacts and every one of them has to work,
on all five of them, or the whole thing has to be booked as production
scrap.

The only way to get that done is make them really small and push hard on
the design rules. The good thing is that the device is disposable and
usually not run more than an hour or so in a typical clinical setting.
Still, in the lab we ran some for years.

Look at a penny. The section of the rolled flex with the five chips in
there is about the size of the word "LIBERTY" on the coin. It
multiplexes 64 elements in synthetic aperture fashion, generates the
transmit pulses, amplifies the receive signals, does the T/R switching
and so on.

Regards, Joerg

You're talking pushing the PCB design rules. I was talking CHIP.

...Jim Thompson

 

[Jim Thompson]

As an aside here, why do web pages often have images such as the above
coffee maker broken up into more than one image? The coffee maker
image is split horizontally just below the cups.

Image 1: http://www.senseo.com/content/images/ph_kza1.gif
Image 2: http://www.senseo.com/content/images/ph_kza2.gif



Best regards,
Spehro Pefhany

Senseo is crap, doesn't hold up to heavy use... plastic exposed to
steam.

We now have a Keurig (K-cup) machine... pump is a little noisy, but it
makes good coffee, seems mechanically sound, and I can order a
multiplicity of teas and coffees from several web sources.

For Espresso I have a Krups machine.

...Jim Thompson

 

[Frank Bemelman]

Your adrenal glands must be the size of a pea by now

About 4 cups of the Senseo machine per day. In the evening
the wife makes a pot of coffee, so there's another 2 for me.
A total of 6 per day, all very reasonable.

You're not wanting me to dehydrate, I hope

 

[Fred Bloggs]

About 4 cups of the Senseo machine per day. In the evening
the wife makes a pot of coffee, so there's another 2 for me.
A total of 6 per day, all very reasonable.

I checked the web site and they located a K-Mart 1.8 miles from me that
carries the machine, and a grocery 1.0 miles away that carries the
re-supply materials. Do you think it's competitive with my 12-cup Mr.
Coffee?

You're not wanting me to dehydrate, I hope

Coffee is a diuretic so it does indeed dehydrate you. The rule is you
need 8oz water intake for each cup of coffee consumed. And who on Earth
drinks a pot of coffee before bed time.

 

[Frank Bemelman]

I checked the web site and they located a K-Mart 1.8 miles from me that
carries the machine, and a grocery 1.0 miles away that carries the
re-supply materials. Do you think it's competitive with my 12-cup Mr.
Coffee?

I think it is twice as expensive compared with a normal
coffeemaker. That doesn't worry me at all.

Coffee is a diuretic so it does indeed dehydrate you. The rule is you
need 8oz water intake for each cup of coffee consumed. And who on Earth
drinks a pot of coffee before bed time.

I drink milk and juice also, and cold tap water. We have fantastic
tap water here. At ~20:30 a cup of coffee and another one at ~21:00.
Then some water, wine, juice, beer perhaps, depending on what is my
mood. Bedtime varies between 01:00 and 02:00. Last glas of water
after brushing my teeth. I sleep like a rock. Now you know everything

 

[Spehro Pefhany]

I checked the web site and they located a K-Mart 1.8 miles from me that
carries the machine, and a grocery 1.0 miles away that carries the
re-supply materials. Do you think it's competitive with my 12-cup Mr.
Coffee?


Coffee is a diuretic so it does indeed dehydrate you. The rule is you
need 8oz water intake for each cup of coffee consumed. And who on Earth
drinks a pot of coffee before bed time.

Addicts who don't want to wake up with a headache often have a cup or
two in the hours before beddy-bye.


Best regards,
Spehro Pefhany

 

[Fred Bloggs]

Addicts who don't want to wake up with a headache often have a cup or
two in the hours before beddy-bye.

Sometimes if I'm slightly sluggish after arriving home in early
evening, after 12 hours at work, I'll drink a cup or two before I do a
hard cycle exercise for about 3/4-1 hour. This offsets the caffeine -
have no problem sleeping, and wake up feeling like Superman.

 

[Fred Bloggs]

I think it is twice as expensive compared with a normal
coffeemaker.

Twice as expensive and it only makes two cups at a time? Well, forget that.

That doesn't worry me at all.

You should be worried about the fact you're not worried.

I drink milk and juice also, and cold tap water. We have fantastic
tap water here. At ~20:30 a cup of coffee and another one at ~21:00.
Then some water, wine, juice, beer perhaps, depending on what is my
mood. Bedtime varies between 01:00 and 02:00. Last glas of water
after brushing my teeth. I sleep like a rock. Now you know everything

Okay- I'll put that in your dossier...