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Thread: News - NASA scientists have created 460GHz vacuum tubes

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    News - NASA scientists have created 460GHz vacuum tubes

    Because solid state transistors seem to be reaching their limits.
    Read more.

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    Re: News - NASA scientists have created 460GHz vacuum tubes

    So our CPU's of the future could be the size of power supplies?
    ...as long as we can overclock 'em

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    Re: News - NASA scientists have created 460GHz vacuum tubes

    Well, not thermionic devices, although when transistors were first developed, it was never thought possible that they would switch at more than a few MHz And for very high power (MWatts at RF frequencies,) thermionic devices are still top dog - for now.

    But, interesting developments to take 'conventional' switching technology to higher speeds - and I use the term conventional to differentiate from alternatives like quantum computing.
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    Re: News - NASA scientists have created 460GHz vacuum tubes

    When you consider that ONE valve = ONE maybe TWO transistors ....

    You're gonna need a power station just to run DOS.

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    Re: News - NASA scientists have created 460GHz vacuum tubes

    Yes, but they aren't really vacuum tubes. No heated cathodes and the current will be tiny, so the heat generation that you got from the kinetic energy of the electrons hitting the anodes at sped won't be there as the transition distance is so small.
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    Re: News - NASA scientists have created 460GHz vacuum tubes

    well they rely on helium. Another good reason the US government needs to stop selling it off for tupence.

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    Re: News - NASA scientists have created 460GHz vacuum tubes

    I just hope it won't have the problem of loosing vacuum over the years, as vacuum tubes have.

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    Re: News - NASA scientists have created 460GHz vacuum tubes

    That's all well and good, but can I toast wienies on these newfangled devices, like I do on the 6L6-es of my audio amp. If I can't, then where's the progress?

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    Re: News - NASA scientists have created 460GHz vacuum tubes

    What next? back to cogs, gears, pulleys & mechanical timing chains etc!
    I think they can be etched onto silicon!

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    Re: News - NASA scientists have created 460GHz vacuum tubes

    Quote Originally Posted by tfosorcim View Post
    That's all well and good, but can I toast wienies on these newfangled devices, like I do on the 6L6-es of my audio amp. If I can't, then where's the progress?
    Don't worry, you can still use a P4!
    Quote Originally Posted by theleader View Post
    What next? back to cogs, gears, pulleys & mechanical timing chains etc!
    I think they can be etched onto silicon!
    You jest, but nanoscale Babbage-style mechanical computing engines have some niche applications in high-radiation environments. And MEMs systems are ALREADY mechanical devices on chips, used for things like IMUs, pressure transducers, DMDs (DLP projection), piezoactuation, antenna tuning, oscillators (tiny pendulums!), biochemical analysis (coupled with microfluidics: tiny plumbing!) etc.

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    Re: News - NASA scientists have created 460GHz vacuum tubes

    Quote Originally Posted by edzieba View Post
    Don't worry, you can still use a P4!
    You jest, but nanoscale Babbage-style mechanical computing engines have some niche applications in high-radiation environments. And MEMs systems are ALREADY mechanical devices on chips, used for things like IMUs, pressure transducers, DMDs (DLP projection), piezoactuation, antenna tuning, oscillators (tiny pendulums!), biochemical analysis (coupled with microfluidics: tiny plumbing!) etc.
    Yes, nanotech is a fascinating thing. Saw some amazing videos of little cogs and mechanisms at sub-microscopic scales, but can't for the life of me think where.

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    Re: News - NASA scientists have created 460GHz vacuum tubes

    Researchers who aren't 'positive and optimistic about progress' are unlikely to attract funding. Sounds like a difficult trick to pull off to me.

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    Re: News - NASA scientists have created 460GHz vacuum tubes

    Quote Originally Posted by maxit View Post
    Researchers who aren't 'positive and optimistic about progress' are unlikely to attract funding. Sounds like a difficult trick to pull off to me.
    In lab testing the NASA scientists have managed to achieve operating frequencies of up to 460GHz for these vacuum-channel transistors – that's 10 times faster than graphene transistors have achieved so far.
    They've demonstrated it. It's fact.

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    Re: News - NASA scientists have created 460GHz vacuum tubes

    Quote Originally Posted by ik9000 View Post
    Yes, nanotech is a fascinating thing. Saw some amazing videos of little cogs and mechanisms at sub-microscopic scales, but can't for the life of me think where.
    https://www.youtube.com/watch?v=CNmk-SeM0ZI


    Less mechanical, but quite interesting (first 3' 30")

    https://www.youtube.com/watch?v=mEH6tDLKcVU
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    Re: News - NASA scientists have created 460GHz vacuum tubes

    Quote Originally Posted by ik9000 View Post
    They've demonstrated it. It's fact.
    I meant a difficult trick to pull of in commercially viable production

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