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Future Phones May Use Vacuum Tube Chips As Silicon Hits Moore's Law Extremes (inverse.com)

An anonymous reader writes: A team of researchers want to replace transistors with vacuum tubes. Vacuum tubes are nothing new, however the ones in development at Caltech's Nanofabrication Group are a million times smaller than the ones in use 100 years ago. "Computer technologies seem to work in cycles," Alan Huang, a former electrical engineer for Bell Laboratories, told the New York Times. "Some of the same algorithms that were developed for the last generation can sometimes be used for the next generation." Dr. Axel Scherer, head of the Nanofabrication Group, said to the New York Times on Sunday, "Ten years ago, silicon transistors could meet all our demands. In the next decade, that will no longer be true." He argues silicon transistors can only take us so far. Vacuum tubes, for comparison, use tiny metal tubes that can control the flow of electricity. They're especially intriguing to researchers as they can provide a better solution to silicon transistors as they can consume less power and take-up a much smaller footprint. The report mentions they have the potential to bring an end to Moore's Law, even if silicon transistors show no signs of disappearing. For example, Lockheed Martin published new cooling methods in March that could help cool chips with tiny drops of water. With that said, Boeing has invested in researching vacuum tube chips. They may appear in the aviation industry before 2020, but it's unlikely we'll see Caltech's research appear in smartphones anytime soon.

9 of 147 comments (clear)

  1. Way tinier than silicon transisters, wow. by Impy+the+Impiuos+Imp · · Score: 5, Funny

    Hmmmmmmmm. Or should I say "hummmmmmmm..."

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    (-1: Post disagrees with my already-settled worldview) is not a valid mod option.
    1. Re:Way tinier than silicon transisters, wow. by BlueStrat · · Score: 5, Informative

      Time for new filter caps?

      Likely so.. Getting a good filter cap that's gong to work at 800 Volts is going to be fun though. Electrolytic's don't like over voltage about as much as reverse voltage... KAPOW...

      Vacuum tube amplifier tech here with 40+ years experience.

      Here's a 25uF @ 800V/900V-surge "firecracker" style.

      https://www.tubesandmore.com/p...

      More stuff here.

      https://www.tubesandmore.com/

      Even more here.

      http://www.fliptops.net/

      Another option is to series-connect two 450V or 500V capacitors to meet the 800V minimum rating requirement. I recommend placing a 100K Ohm 1-watt metal-film resistor across each of the two series-connected capacitors to make sure the voltage across each capacitor divides equally, as the ESR (effective resistance) of individual capacitors varies slightly from unit to unit and causes the voltage to divide unequally without the resistors which could possibly result in one of the capacitors "seeing" excess voltage. Usually not a problem, but why take a chance with a shortcut?.

      The resistors also act as a safety feature as "bleeder" resistors to prevent accidental shock from a stored charge long after power has been removed by slowly discharging ("bleeding") the capacitors after power is removed.

      As a safety tip, *always* keep one hand in your pants-pocket when performing tests/adjustments on live circuits to prevent completing a path to ground through one's chest. Human hearts don't take kindly to high voltage passing through them.

      Be careful and good luck!

      Strat

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      Progressivism (aka US 'Liberalism'): Ideas so good they need a police/surveillance-state to enforce.
  2. What are they talking about? by avandesande · · Score: 5, Funny

    "but it's unlikely we'll see Caltech's research appear in smartphones anytime soon."

    I am reading on a phone right now you insensitive clod!

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    love is just extroverted narcissism
  3. EMP resistance by Firethorn · · Score: 4, Informative

    No, they wouldn't be as resistant on average, because yes, the biggest factor is size.

    That being said, EMP resistance gets 'complicated', and it's easier to stick a small chip inside a faraday cage than a room sized monster.

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    I don't read AC A human right
  4. Re: Better idea by Desler · · Score: 4, Insightful

    If it was censored, how would you be able to see it?

  5. Call me a geek by Tx · · Score: 5, Interesting

    Call me a geek if you like, but I really enjoy watching this video of a guy hand-making triode valves (AKA vacuum tubes), it's somehow very therapeutic. Yep, only vaguely on topic, but what the hell, we're talking about vacuum tubes.

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    Oh no... it's the future.
  6. Steam Punk by Tablizer · · Score: 4, Insightful

    Don't tell me, steam will also make a comeback.

    That's gonna be so cool: switch it on and you hear:

    Chug......chug...chug, chug, chug as puffy white smoke billows out.

    And then Microsoft will tell you, "640 gallons of water oughtta be enough for anyone!"

    1. Re:Steam Punk by Anonymous Coward · · Score: 5, Informative

      Steam never went away. Power plants that use heat (e.g., nuclear or gas) generally heat water to make steam and pass it through a turbine. Yeah, it's not the same thing as the huge piston steam engines with brass fittings that you're thinking of; but it's still steam.

  7. Looking forward to this by Waffle+Iron · · Score: 5, Funny

    I find that the results from numerical computations on today's transistor-based CPUs often have an undesirable "harshness".

    Vacuum tube CPUs will hopefully yield richer, more mellow computational results.