OT: The flame has been lit, I hope

I have some ocean beach property in Yuma I'd like to sell you >:-} ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142     Skype: skypeanalog  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.

e:

e, but might suffice for some jobs.

it would indeed be a gamble. Used as above at low current with low temp ri se it isn't.

range there.

gh the thing and it's not going to get hot enough to do that

eatly.

an be kept down trivially.

near enough.

c:

I'll build it & try it at some point. Thread bookmarked.

NT

Yeah, I did have a smiley face. Jim, I don't know you much at all, but to me you seem like a big teddy bear, (I trust this won't offensive.) It's not at all hard to rub you the right way, and you'll share what you know.

From my perspective, (somewhat selfish) it would be totally awesome (and fun) for you to put some of your circuits together into a book with comments!

George H.

Yep. That's me ;-)

Ask my grandkids.

...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142     Skype: skypeanalog  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.

I think Larkin posted that circuit here as a LED (indicator) driver. Probably why Jim doesn't like it :)

(just a joke, don't start you two or I'll have to split you up).

--

John Devereux

I don't see Larkin's posts. Only occasionally do I see follow-ups to his posts... I have a pretty robust filtering system to minimize aggravations >:-} ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142     Skype: skypeanalog  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.

Your circuit analysis technique seems like alchemy because a lot of things are intuitive to you, and you probably can't imagine how to explain it, or even that it would need to be explained.

When you explain something to someone, you have to articulate your thoughts like never before. That will happen when you get to the point where you are explaining circuit analysis to that kid. Then I hope you'll say, "Hey, I could write that down."

The future of the nation depends on it Jim!

You've put your finger right on it... that is indeed the problem.

I sometimes think circuit design is like a foreign language. Last night I was literally dreaming in circuit schematic language of how to model digital parts in the Analog domain. This morning the dream proved to be correct... I can take information from the datasheet and parameterize:

.SUBCKT Buffer_Config A Y VP VN PARAMS:

• CL=50pF

• VDD=4.5V

• IOH=4mA

• IOL=4mA

• TRF=7ns

• VOH=4.32V

• VOL=0.15V

• TPROP=9ns | (Undisclosed cleverness :-) | |

(74HC parameters)

Matches the datasheet perfectly.

Last night, whilst sipping a glass of Francis Ford Coppola Pinot Grigio, I sketched out a scheme to behavioral model the output stage of an OpAmp such that it properly reflects load current to the proper supply, using only one G-source and one E-source:

I'll now incorporate that into my universal OpAmp model that I've been working for several months... 16 or so specifications from datasheet as input, model performance matches everything: GBW, excess phase, slew-rate (different plus/minus), recovery from railing, input-referred noise, bounded outputs, current limiting (different plus/minus), etc... all done with less than 10 lines of code (before encryption >:-}

;-) ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142     Skype: skypeanalog  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.

Just think about what you will say to your grand kid when he wants to know about analysis. You'll find a way to explain some of it.

e in

ht

es

f the

se

I've not built & tested it yet, so will save any certainties till then. Jim said the Early effect would be a problem, but I don't see it. The slope of Vce versus Ic depends on Early voltage & Ic, and at Ic very low relative t o Icmax, the slope is close to flat enough to make a useful constant curren t device. But as I said, Jim does have a lot more experience than me so I'l l wait until its built & tested.

NT

It seems inevitable. Digital logic gates are after all analogue circuits that we treat in a digital manner. Relays excepted :)

NT

Absolutely true... a digital gate, at the device-level, is Analog. In

1997 I redesigned most of ON Semi's 74HCxxx line to fit the process of a new fab facility (Chartered Semiconductor). A wee bit tricky to maintain the (relatively) slow speed of 74HC using a high-speed process ;-)

The hardest part in the line-up was the 74HCU04... the _unbuffered_ inverter... carefully tweaking the gain-bandwidth product... since the

74HCU04 is used a lot in crystal oscillators. ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142     Skype: skypeanalog  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.

Jim-out-of-touch-with-reality-Thompson works hard at insulating himself from stuff that doesn't make him feel good.

--
Bill Sloman, Sydney

I do not understand the reason for your post. Everyone who reads SED knows the kind of things that Jim Thompson posts and has an opinion about Jims personality. So your post did not help to inform anyone.

And they also know the kind of things you post. So your post did not help people with understanding you.

Maybe I missed something. Feel free to explain why you made this post.

Dan

It's easier to understand without the load resistor.

V+ -+- | [R1] | .----+ | | [R2] | | |

lol :)

NT

We get newbies from time to time. They do have to be brought up to speed.

That's a relief.

I hadn't used the line "Jim-out-of-touch-with-reality-Thompson" recently, and saw a space where it would fit.

Feel free to explain why you made your post.

This isn't sci.design.amateur_psychology

--
Bill Sloman, Sydney