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Cockroft-Walton question.

Why must you behave in such a boorish and rude fashion? "Wrong" is a fair comment. "Silly" is an insult. I have been around for a while and I have never seen the specific configuration we were discussing (A Cockroft-Walton multiplier that drives an inverter that drives a second Cockroft-Walton multiplier). I have seen many different kinds of voltage multipliers and have never seen that particular configuration ever used.You claim that that particular configuration is used, which was a surprise to me. There is nothing "silly" about not knowing about a particular rarely-used configuration.

People sometimes make mistakes. I appear to have done so out of lack of knowledge in this case, and I acknowledged my error as soon as I saw your post claiming that the configuration in question is indeed used, without commenting on your use of the term "silly." Seeing that I didn't rise to the bait, you repeated it after I said that I was wrong. What is the point in being a flaming asshole, Winfield? Why turn what could be a learning experience into an adversarial relationship? Do you really think that flaming a well-meaning person who made an error and then acknowledged it is acceptable behavior?

I think you are a better person than the one I am seeing in your posts.

Reply to
Guy Macon
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Multiplication by an integer is equivalent to adding an integer number of times. The "multiplier" terminology refers to adding n times where n is the number of CW stages- the output is n*Vin.

Nope- the second stage produces 3V and not 4V. The 10 stages gets 11V and not 20V- each stage increments by 1V.

Doesn't seem that anyone has hit on that method yet.

Reply to
Fred Bloggs

Guy Macon wrote in news: snipped-for-privacy@corp.supernews.com:

This fellow is going to accidentally kill himself one day.

--
---
Chip

"Oderint dum metuant."
     - Lucius Accius
Reply to
Chip Anderson

See, for example...

Newsgroups: alt.binaries.schematics.electronic Subject: Charge Pump (from S.E.D) - ChargePump-4X-Example.pdf Message-ID:

...Jim Thompson

--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
|  Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
|  Phoenix, Arizona            Voice:(480)460-2350  |             |
|  E-mail Address at Website     Fax:(480)460-2142  |  Brass Rat  |
|       http://www.analog-innovations.com           |    1962     |
             
I love to cook with wine.      Sometimes I even put it in the food.
Reply to
Jim Thompson

Yes, that should have been 3V not 4V.

Bob Clark

Reply to
rgregoryclark

Correction: with the usual circuit adding another stage takes it from

2V to 3V, not 4V.

Bob Clark

Reply to
rgregoryclark

Google didn't pull that one up, since Google doesn't archive binaries. Do you have another source for that?

Bob Clark

Reply to
rgregoryclark

Use a good news server. Doesn't your ISP have a news server?

I designed it ;-) It's now on the S.E.D/Schematics page of my website.

...Jim Thompson

--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
|  Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
|  Phoenix, Arizona            Voice:(480)460-2350  |             |
|  E-mail Address at Website     Fax:(480)460-2142  |  Brass Rat  |
|       http://www.analog-innovations.com           |    1962     |
             
I love to cook with wine.      Sometimes I even put it in the food.
Reply to
Jim Thompson

How many times does it multiply the input voltage?

Bob Clark

Reply to
rgregoryclark

"ChargePump-4X-Example.pdf" 4X ?:-)

...Jim Thompson

--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
|  Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
|  Phoenix, Arizona            Voice:(480)460-2350  |             |
|  E-mail Address at Website     Fax:(480)460-2142  |  Brass Rat  |
|       http://www.analog-innovations.com           |    1962     |
             
I love to cook with wine.      Sometimes I even put it in the food.
Reply to
Jim Thompson

This thread is setting some sort of record for "least coherent."

John

Reply to
John Larkin

This is true. Rational people could explain the OP's issue using the terms "AC" and "DC," but we can't use those terms here anymore..............................

Reply to
BFoelsch

What's the puzzle? The ac swing you have available to work with and stack up, is always V, that's not doubled, or tripled, etc., at any point. That'd be nice, but how would it be?

--
 Thanks,
    - Win
Reply to
Winfield Hill

well i meant to say 3000 V not 3000 Kv or should have said 3Kv on the input. and that is on the input side of the pie xformer. the output of the pie is around 12k..18k volts. one of the vessels is around some where in the neighborhood of

40 or so feet long. 
--
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5
Reply to
Jamie

from what i have seen in here from some, it may not be an accident! :)

--
Real Programmers Do things like this.
http://webpages.charter.net/jamie_5
Reply to
Jamie

Cockroft-Walker multipliers with fewer components can multiply voltage

8 times:

Cockroft Walton Voltage Multipliers

formatting link

Are saying your circuit has the advantage of being able to be staged to *multiply* by 4 each time?

Bob Clark

Reply to
rgregoryclark

"Charge pump" is a catch-all term that is also applied to Cockroft-Walton multipliers. Are you sure the type you're thinking of can be staged to *multiply* by the same factor at each stage?

Bob Clark

Reply to
rgregoryclark

Read more carefully, it multiplies 8X the PEAK, or 4X the Peak-to-Peak; mine does the same, just in a fashion that allows monolithic implementation without forward biasing wells and creating latch-up, etc.

Diodes can't be implemented in monolithic form, as in your example, because all kinds of bad parasitic things happen.

You've got a hair up your butt about "staged".

"Staged" doesn't happen. The output is DC. The only way would be to add a switching device at the end of a 4X and you have no power to run it.

...Jim Thompson

--
|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
|  Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    |
|  Phoenix, Arizona            Voice:(480)460-2350  |             |
|  E-mail Address at Website     Fax:(480)460-2142  |  Brass Rat  |
|       http://www.analog-innovations.com           |    1962     |
             
I love to cook with wine.      Sometimes I even put it in the food.
Reply to
Jim Thompson

The circuit that I described as a theoretical possibility that isn't used, only to discover that someone was using it, actuall does multiply.

Consider a bog-standard Cockroft-Walton voltage multiplier that has a DC-to-AC inverter on the front end, and enough levels to get a nice

10X increase from the DC in to the DC out. 10X increase from start to finish.

Now take that 10X DC out and use it to feed another bog-standard Cockroft-Walton voltage multiplier that has a DC-to-AC inverter on the front end, and enough levels to get a nice 10X increase from the DC in to the DC out.

100X increase from start to finish. Add another, it's 1000X increase from start to finish.

The downside is that doing this throws away the main advantage of the Cockroft-Walton configuration; that no component is subjected to more than a small fraction of the output voltage. A regular Cockroft-Walton can go as high as you want.

(I am still amazed that anyone would do it that way given the many alternative topologies that seem, on the face of things, to be better choices.)

Reply to
Guy Macon

You can't read what is not there. You ONLY said it multiplies "4 times". The Cockroft-Walton circuit page specifically says 8 times peak. You're post is also misleading in that it was in response to the post by "cnctut" who suggested "charge pumps" could multiply at each additional stage. I don't know if this is accurate or not.

Bob Clark

Reply to
rgregoryclark

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