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Building Coaxial transmission line on PCB?

Discussion in 'Electronic Design' started by Geronimo Stempovski, Feb 12, 2007.

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  1. John_H

    John_H Guest

    Read up on the Cuk converter. Slobodan Cuk's topology.

    Without the proper balance, you may get ripple. I've also seen one opinion
    that the Cuk topology *can't* regulate with a stable feedback but I haven't
    seen reason for this myself. Simulations with "ideal transformers" back in
    '89 had input and output currents both going dead-flat solid after the

    (posting to the newsgroup I know John Larkin visits, cross-posts removed to
    the newsgroup I visit)
  2. John Larkin

    John Larkin Guest

    Right. You'd buy them charged, guaranted to run for 200K miles.

  3. msg

    msg Guest

  4. MassiveProng

    MassiveProng Guest

    Are they fooly regulated?
  5. MassiveProng

    MassiveProng Guest

    You ain't real bright. You must have been daydreaming about
    perpetual motion when the instructor covered this subject.
  6. MassiveProng

    MassiveProng Guest


    The last supply I designed with our engineering group was for a CAT
    scanner, and it was EXACTLY 1500 volts, regulated to within one volt,
    and it had 2mV of ripple. That was AT the switching frequency of
    17kHz at the full 250 Watts output.

    That took a half year and two iterations to achieve.

    We also made an xray supply that made 4kV at 1.5uA, and that had
    only 2mV of ripple at rated loading.

    Linear OR switcher, under full rated load, there IS going to be
    ripple voltages present. Period.

    You cannot look at a supply with no load on it, and declare it to be
    ripple free. You are compiling errant data if you do.

    Try again, Vlad.
  7. I don't beleive you didn't understand what is the previous quoting about.
    It could be done better then that.
    Good for you. Although very slow.
    1.5uA is not much.
    You don't have to preach that 2 + 2 = 4.
    I don't care. It is not my problem.

  8. MassiveProng

    MassiveProng Guest

    Not in the package constraints we had. We bettered the competitor's
    product as well. They were unable to achieve the spec.

    Do you even know what that ripple figure represents?

    That's 0.000001333 % ripple.

    You won't be getting lower than that any time soon in the chassis we
    did it in at 250 Watts loading.

    I don't think you are aware of what is or is not "being done".

    You're just spittin' out words to see where they splatter.
  9. MassiveProng

    MassiveProng Guest

    Nope. It was dual audio amps feeding a center tapped transformer and
    multiplier stage. We found the right frequency for the application
    with the hardware topology we used.
  10. MassiveProng

    MassiveProng Guest

    You don't know much about X-ray flux, or the generation thereof.
  11. MassiveProng

    MassiveProng Guest

    Aren't you the dolt that claimed that zero ripple supplies are easy
    to make?
  12. MassiveProng

    MassiveProng Guest

    Why are you even in the fucking thread then, dipshit?
  13. Yes, I do know that very well, since I do work on the audio and
    measurement equipment.
    This is -117dB. No doubts it is a decent result, although it is not a
    world record by any means.
    I can't understand. Are you trying to scare a porcupine by showing him a
    naked butt?

  14. Dude, do you read the words which I didn't wrote?
    Please find a quote or go take your pills.

  15. And this is not your problem.

  16. Sorry, dude. At one time I was working with the X-ray crystallograph.
    The tube was typically operating at 40...50kV, draining the current
    about 10..15mA. So here we go.

  17. MassiveProng

    MassiveProng Guest

    For a power supply?

    You're nuts. ESPECIALLY at 1500 volts.
  18. MassiveProng

    MassiveProng Guest

    And you can **** off.
  19. MassiveProng

    MassiveProng Guest

    I got a pill for your ass, fuckhead.
  20. MassiveProng

    MassiveProng Guest

    And THAT supply ALSO had a pretty low ripple figure, I'll guarantee

    The whole idea behind clean DC for the X-ray tube is that the X-ray
    flux is clean and pure. THAT yields the best contrast ratio in the

    The supply I mentioned feeds a small device meant for looking at gas
    pipes in city streets.

    I also made a supply that was 50kV at 250Watts That's only 5mA.

    So your supplies were leaning toward a kW, eh? That must have been
    some X-ray flux.

    Still, you should have known that the ripple figure I gave for the
    CAT supply was exceedingly low. By ALL standards.
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