QUANTA

Wednesday, May 4, 2011

Breakthrough Will Make Smartphones Smarter about Energy Use

If you own a highly capable smartphone that can play high-definition movies and games, take photos, and connect you to the global positioning system with a flick of the wrist, then congratulations. You also own a power-hungry device that needs constant recharging. All that capability is part of the problem. Even though you can only use one app at a time on the iPhone, your device is doing a lot processing you don’t see, such as storing videos, dialoging with servers, and hooking up with satellites, and it’s doing all that all the time.

Wonyoung Kim, a Harvard University graduate student, has developed a tiny DC-DC power converter to help the chips in your so-called smartphone use energy with a bit more intelligence. Kim’s multi-core voltage regulator (MCVR) would work to keep each chip in the device from drawing too much power when not in use, and then draw power quickly during instances of user demand.

“Including the MCVR on a chip would add about 10% to the manufacturing cost, but with the potential for 20% or more in power savings,” says Kim.

Source: http://www.wfs.org/


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