Synchronous Switchers

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That's why it needs a current-steering network to square it up.

A couple fast shottkies and an offset would trim off front knee and square the overshoot (not the ring, if it's real).

.---, / i1 \ \ / '---' | V V | .--+--. V1 .-- | | --- | D1 V V D2 | .------ | .---' .---' R1 | / | | | |

-' >-----' '-------+------> ---' | R2 | === GND

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James

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all > >> >ROW to him - he probably doesn't recognise this as a valid excus e.

f his favourite adjectives. The fact that he hasn't got a clue how it works or why it might produce a sine wave with a low harmonic content doesn't st op him from applying it to a project that he knows absolutely nothing about .

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In this context "peer" just means somebody as well- or better-informed than the author - I've refereed occasional papers for peer-reviewed journals, a nd slung out more than I've "rubber-stamped".

If you knew anything about the subject, you'd know that nothing gets "rubbe r-stamped", and that the evidence for anthropogenic global warming isn't ac tually BS, but you are what the Dutch call a vaakidiot, who knows everythin g about his own area, and very little about anything else."Vaak" translates as trade or profession - expertise comes close, but doesn't capture the po int that you make your living from your "vaak".

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Not in my products! That spike messed up the front-end of opamps clear across the board, parts that, to look at the schematic, weren't even connected to the switcher.

LM3102. Not recommended.

his favourite adjectives. The fact that he hasn't got a clue how it works or why it might produce a sine wave with a low harmonic content doesn't stop him from applying it to a project that he knows absolutely nothing about.

author - I've refereed occasional papers for peer-reviewed journals, and slung out more than I've "rubber-stamped".

"rubber-stamped", and that the evidence for anthropogenic global warming isn't actually BS, but you are what the Dutch call a vaakidiot, who knows everything about his own area, and very little about anything else."Vaak" translates as trade or profession - expertise comes close, but doesn't capture the point that you make your living from your "vaak".

You need to hurry. Statistically I figure to be entering my last decade. At the rate you're going, I'll never see your "peer" review

...Jim Thompson

han the author - I've refereed occasional papers for peer-reviewed journals , and slung out more than I've "rubber-stamped".

bber-stamped", and that the evidence for anthropogenic global warming isn't actually BS, but you are what the Dutch call a vaakidiot, who knows everyt hing about his own area, and very little about anything else."Vaak" transla tes as trade or profession - expertise comes close, but doesn't capture the point that you make your living from your "vaak".

I've got pressure closer to home. I've spent about $2000 on parts - a signi ficant portion of it on getting two sets of the transformer and inductor wo und, and my wife wants to see them turned into something that does somethin g.

And you wouldn't get to see any peer reviews. The referees write them, and they are seen by just the editor, the author(s) and - sometimes - the other referees. Nobody else.

Much too nice for Sloman to pollute. St. Petersburg, Fl. has some nice historical sites, as well. I hear that tarpon Springs is nice, too. All three are close to each other.

publication here. You may eventually get some work from somebody who wants an integrated circuit version.

The loser has no clue that discrete circuits don't translate directly into ICs.

No one will see it. Where will he ever find peers?

precludes publication here. You may eventually get some work from somebody who wants an integrated circuit version.

I wonder what Mike Terrell thought that I had in mind? Not that it matters. Mike's fantasy world has even less connection to reality than Disneyland, and isn't remotely as well engineered.

You are certainly no one's peer.

How's that jaw?

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That's the proof--it could be a jammer, 'fer instance. Or a (very) poor-man's TDR.

I'll have to get some for my SRD collection.

"The House of Peers, throughout the war, Did nothing in particular, And did it very well" (W.S. Gilbert)

Yep. We did St. Pete in the early '80's in between design reviews with a foundry in West Palm Beach (MCE, now defunct).

And the world's best pina colada's >:-} ...Jim Thompson

the author - I've refereed occasional papers for peer-reviewed journals, and slung out more than I've "rubber-stamped".

"rubber-stamped", and that the evidence for anthropogenic global warming isn't actually BS, but you are what the Dutch call a vaakidiot, who knows everything about his own area, and very little about anything else."Vaak" translates as trade or profession - expertise comes close, but doesn't capture the point that you make your living from your "vaak".

significant portion of it on getting two sets of the transformer and inductor wound, and my wife wants to see them turned into something that does something.

are seen by just the editor, the author(s) and - sometimes - the other referees.

Aka "declared working" by Larkinesque village idiots ?:-} ...Jim Thompson

{>:-}

BTW, I am an intense fan of G&S! ...Jim Thompson

-- | James E.Thompson | mens | | Analog Innovations | 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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I tried something like that recently. I had a 40 ps, 0.8 volt step I wanted to speed up into a 20 ps, lower amplitude step, with a current steering network like that. Turns out that the parasitic capacitances of the diodes killed the idea. Any packaged diode that I can buy has a bad tradeoff between series resistance and shunt capacitance. I could do better buying chips and wire bonding, too much work.

I could do what I want with a fast AND gate, for about $600.

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I'm actually waiting for a potential customer to get serious. It's interesting but not something to spend a lot of effort on yet. I play with a lot of ideas without being really serious; some get serious later, some don't.

The TDR circuit in a Tek SD24 is very like the thing James drew, SRD and current steering diodes. There's a Tek patent and the inventor is Agoston Agoston. You could look it up if you were interested, but of course you aren't.

The actual hardware is here:

Overall sampling head

and TDR step generator

A) I doubt he'd be competent to work in this speed domain and

B) I do know semiconductor people who will work with me on this who, unlike Jim, understand picosecond stuff and aren't assholes.