Re: Are TS555's really supposed to suck this much?

On Thu, 21 Jan 2010 16:15:53 -0800 (PST), Bill Sloman

> > wrote: > >> >> On Wed, 20 Jan 2010 21:18:43 -0800, John Larkin

Snip . . . .

>It's more that John Larkin is good at electronic design, and has > >recognised precisely how useful the 555 is - which is to say, not a > >useful device in most applications. > > Why then is it STILL one of the most widely used chips in existence? >Legacy design. It worked for specifc applications, back in 1971 when > Hans Camenzind designed it, and people have been copying these > circuits ever since. Not because there isn't a better alternative - > there almost always is - but because finding out what the better > alternative is, qualifying the new component and explaining to the > boss why you've wasted your time solving a non-problem all take time, > and while the time is usually well-spent, in the long term, lots of > people have more immediate short-term concerns.

Snip some more ....

Hans R Camenzind has some interesting information on IC design for those that would like to try their hand at it. Search for the article "Redesigning the old 555" by Hans Camenzind. It was published in the IEEE Spectrum Volume 34 Issue 9, Sept. 1997. IEEE Explore has a copy of the article.

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Google might have a link to a free copy of the IEEE Spectrum article.

A short article on Hans Camenzind and the 555 design history is available at

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The text and audio recordings of an interview with Hans on the design of the

555 and PLLs are available at
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It covers most of the info in the IEEE Spectrum article. There are however more detail and diagrams on the 555 design in the IEEE article.

I consider my self lucky to have experienced the days of BIG IC mask drawings and peeling Rubylift.

Enjoy the weekend

Gerhard van den Berg CSIR

Reply to
Gerhard
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[snip]

Yep. I used to do my own layouts and cut and peel the Rubylith myself.

Maybe a hundred transistors maximum. Now my chip designs number in the tens of thousands of transistors ;-) ...Jim Thompson

-- | James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

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| 1962 | I love to cook with wine. Sometimes I even put it in the food.

Reply to
Jim Thompson

The article seems to have gotten itself into Hans Camenzind's 2004 book "Designing Analog Chips" ISBN 978-1-58939-718-7

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I saw his in action back in my first industrial job at Plessey Pacific in Melbourne around 1970.

My colleagues used to cut Rubylith and ship it off to Plessey Researh at Swindon in England to be converted into silicon. A couple of weeks later, back would come a working analogue integrated circuit. Impressive.

I can remember them being deeply envious of Bob Widlar's super-beta transistors, as used in the LM108.

-- Bill Sloman, Nijmegen

Reply to
Bill Sloman

I read somewhere that the rubylith IC layout guys decided that 1 mil =

25 microns, to simplify their lives.

I used to make pcb power and ground planes by cutting rubylith, with x-actos for the straight stuff and dividers to score circles. I am not the slightest bit nostalgic about hand-taping PC boards; it was a huge pain.

Does anybody remember Lorry Ray?

John

Reply to
John Larkin

article.http://ieeexplore.ieee.org/iel3/6/13487/00619384.pdf?arnumber=619384

We can all tell, however, that you were nothing more than an overpaid stander by.

You were probably promoted beyond your level of competency then as well.

That is also probably why you are unemployable now.

The 555 is fine, and you and your reputation (not that you had one) are shit in this group, boy.

Reply to
Archimedes' Lever

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I was doing a different job - surveying unconventional high speed printers for a miliary digital fax machine. This involved odd stuff, like predicting the failure rate of the framing system as a function of the noise level on the fax link, but no integrated circuit design.

It was more or less the same kind of work that I ended up doing throughout my career - we can't find a specialist in the area so throw in someone who looks as if he can learn it from scratch.

Guess again.

re

Two propositions that only an idiot - or to give John Fields his meagre due, someone with a severe incapacity to learn about new devices - would endorse, but that's no surprise.

-- Bill Sloman, Nijmegen

Reply to
Bill Sloman

--
Since finding a solution to a problem and thus determining that it's a
non-problem is part and parcel of the design process, it's no wonder
that by glossing over what you considered to be non-problems and
refusing to spend the time required to evaluate them properly, those
"non-problems" wound up coming back around biting you on the ass,
eventually causing your "career" to nose-dive into oblivion, as attested
to by your never-ending series of anecdotes blaming the failure of your
projects on everyone and everything but yourself.
Reply to
John Fields

One of my college jobs was as a pcb layout artist. I got pretty good at it, if I do say so myself.

First job out of college was an RF lab where (believe it or not) they forced us to use rubylith at 60 MHz. instead of black tape and donuts. Took me at LEAST 10 times longer to do the layout and nowhere NEAR as neat as with the regular stuff.

I didn't stick around too long at that place.

Jim

Reply to
RST Engineering

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I don't recall that my career ever nose-dived at any point. Transplanting myself to the Netherlands didn't help, but nobody ever complained about my technical competence.

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Mastering one field doesn't say anything about one's capacity to master another. Master several, and you probably can master several more. In 1978 and 1979 my name appeared on a couple of patents on diagnostic ultrasound. In 1984 it appears on a patent for a scheme for charged particle deflection in electron microscopy.

Dream on.

) are

Do try to make your claims credible. I'm not going to be bothered wasting time watching some video clip from U-tube, and if you could learn about more modern devices, you wouldn't still be fixated on the

555.

-- Bill Sloman, Nijmegen

Reply to
Bill Sloman

--
Well, at least you take the responsibility for that move...
Reply to
John Fields

article.http://ieeexplore.ieee.org/iel3/6/13487/00619384.pdf?arnumber=619384

Billy Slobman thinks his own thumb up his ass means that _he_ is a proctologist :-) I'm always pleased to note that I'm the highest standard for Slowman's disdain, but please don't feed the jerk. Let him die that most unpleasant of deaths... alone ;-)

-- ...Jim Thompson

| James E.Thompson, CTO | mens | | Analog Innovations, Inc. | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | Phoenix, Arizona 85048 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

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| 1962 |

Reply to
Jim Thompson

article.http://ieeexplore.ieee.org/iel3/6/13487/00619384.pdf?arnumber=619384

You are familiar with the phrase "broken record"? Your remarks, your jokes, you stabs at humor... virtually everything you say is as old as the hills.

It is you that is truly alone.

Reply to
Archimedes' Lever

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  1. > >>> >> IEEE Explore has a copy of the article.http://ieeexplore.ieee.org/=iel3/6/13487/00619384.pdf?arnumber=3D619384

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And Jim-way-out-of-touch-with-reality-Thompson thinks his sense of humour deserves a wider audience.

-- Bill Sloman, Nijmegen

Reply to
Bill Sloman

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John Fields enjoys his little fantasies.

nd

Your idea of documenting an achievement is to post something on U- tube. Getting one's name on a patent is a little more difficult. It doesn't necessarily imply mastery of a field - krw has boasted about his patent here, which he wouldn't have done if he had mastered his field - but it does imply a certain measure of accomplishment.

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You do have an unfortuate capacity for self-delusion. It makes you look more of nitwit than is strictly necessary.

,

More self-delusion.

And so would John Larkin and Tim Williams. Lets face it - your devotion to the 555 is pathological. One can only imagine that you suffered serious brain trauma shortly after the device was introduced, and lost your capacity to remember anything about any more recent device.

You claim to have used 100k ECL but I've never seen you post a word that might suggest that you are aware that a track on a printed circuit board might have a characteristic impedance, and 100k is fast enough - unlike 10k - that you do have to keep that in mind while using it.

-- Bill Sloman, Nijmegen

Reply to
Bill Sloman

--
Well, even if he only had an audience of one who thought he had a sense
of humor, the quotient of the ratio of his audience to yours would be
infinite. :-)

JF
Reply to
John Fields

Since you can be relied on to brown-nose Jim at every available opportunity, this will be perceived as just another example of your abject ass-licking.

-- Bill Sloman, Nijmegen

Reply to
Bill Sloman

--
BTDT: US Patent #4,937,519.

Have you documented anything on YouTube?
Reply to
John Fields

What a sick loser, Slowman! I "boasted" about my patentS (eight, BTW) because YOU specifically ASKED ME if I had and patents, implying that I did not and therefore you were somehow a superior being.

You are a liar, Slowman! I wouldn't have said anything about them if

*YOU* hadn't specifically asked.

I suppose people who haven't mastered their field have all sorts of patents in said field. What a moron, Slowman!

Ignore the asshole, John. He's like DimBulb, he thrives on abuse.

Reply to
krw

Billy Bob Slobman thrives on ATTENTION. He probably was an unwanted child. Ignore him completely and he'll go away. ...Jim Thompson

--
| James E.Thompson, CTO                            |    mens     |
| Analog Innovations, Inc.                         |     et      |
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
| Phoenix, Arizona  85048    Skype: Contacts Only  |             |
| 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.
Reply to
Jim Thompson

--
It might seem like my seeing the humor in Jim's post(s) is ass-licking
when comparing his posts to yours, but that's only because the only
thing to laugh at in your posts is the author.

As far as brown-nosing goes, when I think Jim's right I agree with him,
and when I think he's wrong I disagree with him.

What's brown-nosing about that?  

JF
Reply to
John Fields

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