4-20mA Precision Source Ideas

Yep, Larkin is cracking :-)

Is it time to start the next round of "insults" ?:-) ...Jim Thompson

You are getting cross, and going dotty on us.

John

Toothless old gits don't have anything to say about electronics any more. They should stop littering s.e.d. and move over to twitter to post their mutual admirations.

John

Talk about 4-20 mA circuits, if you dare. Your fixation with dots is preposterous.

John

It's been going on for two days. Maybe you should learn to pay attention. If you can't keep up, take notes.

"A wise man is never insulted, because the truth will increase his wisdom, and an untruth is not worthy of note." -- author unknown

Hope This Helps! Rich

Because the housework was all that Mom asked me to do, and not ever having been a diaper-changer, the smell would pretty much incapacitate me, even while helping Mom put the sheets into the washer.

Thanks, Rich

You can pick your friends, and you can pick your nose, but you can't pick your friend's nose.

Hope This Helps! Rich

When you get to a fourth- or fifth-generation diazo, the dot can get a little bit obscure. That's where the "R" for the decimal point came from.

Cheers! Rich

Diazo? Blast from the past!

Actually, I still have and occasionally use a blueline machine, since I like to draw original schematics on vellum. But bluelines were seldom used n-th generation, since you can't actually copy a blueline to a blueline. You need a "sepia" for that.

But if you're losing connection dots, you're going to be in big trouble on everything else.

Again, ancient history. All our official schematics are cad, and print on laser printers, if at all. The schematic is just a reference drawing, and the thing that matters is the netlist.

Does anybody else here still do diazo copies?

John

Know of any rad-hard ones? I need one to read anything DimBulb writes.

Sure it is. It's just different. Doing both is the best of both worlds. I wouldn't even mind a little firmware thrown in the mix, if I don't have to deal with anything as horrible as C. ;-)

Having a kid quickly hardens one to that sort of thing. He would probably rather your mother did it anyway. In my mother's last year she wouldn't let any of us anywhere near her in similar conditions. She had either a nurse or one of her daughters-in-law help.

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They have to be *really* sloppy not to catch such things in DRC or netlist checks. Yes, I have worked with some of them ("DRC? What's that?" or "Oh, that's too much work.").

We have one that's been killing us. We've fixed it at least a dozen times and it still comes back. The only thing we can figure is that the boards are different depending on who we use for fab.

I had that problem with Xilinx Virtex and Virtex-E parts. Same thing; cap on CCLK fixed it. Never found out why, but it worked. Found the fix by scopeing it long enough to get through a complete config (probe capacitance was enough for it to work).

It's not a rule, so they're not "rulebound"; just idiots.

"Have ran it", AlwaysWrong?

Your grasp of the English language is right up there with your grasp of everything else, AlwaysWrong.

If you're too stupid to check... Sure, guns are dangerous.

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Ditto. Spartan 3. A fet probe didn't matter, but a regular probe fixed it.

I think the newer Xilinx parts have Schmitt triggers on their CCLK inputs.

John

You're illiterate, too, AlwaysWrong. That's what *you* are reduced to.

Your "contribution" is always wrong, AlwaysWrong.

WTF are you yammering on about now, AlwaysWrong?

I am not AlwaysWrong, either, AlwaysWrong.

If company B can't read dots, they need to invest in a pair of glasses or get out of the business. In your case, you should get out of SED.

WRONG, ALWAYS WRONG! It is *NOT* a rule. Only a complete idiot would make such silly "rules".

...unless there is a CONNECTION DOT. What a stupid twit, you are, AlwaysWrong.

WRONG!

Wrong, AlwaysWrong.

Good grief, you're stupid!

Any "instructions" you could possible give would be wrong, AlwaysWrong.

I have no problem with that paragraph. You're AlwaysWrong.

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Odd that Altera doesn't seem to have had that problem and Xilinx has had it for a decade. The Altera FAE looked at me like I'd grown another head when I asked if there was anything special, like the cap, I needed to know about configuration.