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Susan Rambo
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When will my gadgets be untethered?
Susan Rambo   8/6/2014 3:06:51 PM
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Thanks for the article. Very interesting. What in your opinion is the best option for my cell phone to become untethered? Some kinda of passive energy harvesting?

 

rene-elfrink
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Re: When will my gadgets be untethered?
rene-elfrink   8/14/2014 9:43:48 AM
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The issue with cell phones today is that they consume more power than can be generated with energy harvesters. In my opinion the best option would solar. However, most users don't keep there phone in direct light. And indoor solar cells also generate not enough power yet.

mhrackin
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Alternative proposal
mhrackin   8/15/2014 4:04:09 PM
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I have a great idea that combines several hot topics: energy harvesting, wearables, alternative energy sources, and reduction of emissions contributing to climate change.  It uses fuel cell technology to convert methane from natural sources into electricity.  The tie-in to wearables is the use of the methane produced by the human digestive tract, so this would be embedded in undergarments of the appropriate type.  Of course, like nearly all such "harvestable" alternative energy sources, it tends to be intermittently available and therefore would have to work with a more or less conventional rechargeable battery for supporting sustained loads.  Suggestions for a suitable marketing name for this product/technology are actively solicited!



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As data rates begin to move beyond 25 Gbps channels, new problems arise. Getting to 50 Gbps channels might not be possible with the traditional NRZ (2-level) signaling. PAM4 lets data rates double with only a small increase in channel bandwidth by sending two bits per symbol. But, it brings new measurement and analysis problems. Signal integrity sage Ransom Stephens will explain how PAM4 differs from NRZ and what to expect in design, measurement, and signal analysis.

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