| ||Thread Tools|
|2nd November 2012, 07:21||#1|
Join Date: May 2010
Better power amplifiers could double mobile battery life
Power drain on future mobile devices could be reduced by half using a more efficient power amplifier which is being developed by an MIT spin-ff company, Eta Devices.
At the moment, mobile phone chips that turn electricity into radio signals are rather wasteful, providing only around 35 percent efficiency. This means that the majority of energy used to send information is lost to heat, draining battery at a swift pace.
According to TechnologyReview, MIT researchers at Eta Devices say that they have solved the problem by more intelligently determining the need to increase the power needed to send a signal.
At the moment, power amplifiers use transistors that operate at two levels - standby, and output signal mode for when sending a signal. However, the standby mode voltage is generally kept high, as big jumps from low to high power can distort the radio signal, and this creates large demands on power, depleting battery life.
The advance is essentially a "blazingly fast gearbox", the researchers say, and is able to choose among different voltages that can be sent across a transistor used in the chip. This is done up to 20 million times a second, selecting the voltage that minimises power drain.
This method, called asymmetric multilevel outphasing, will help even when receiving a call, or downloading a video on smartphone for example, as the amplifier is busy even at this point, sending out receipts of packets.
Overall this could help double the efficiency of the power amplifier from the 35 percent achieved in most handsets.
The technology is still at the lab stage, but commercialisation, starting with LTE base stations, is expected to begin in 2013.
|Thread||Thread Starter||Forum||Replies||Last Post|
|Ubuntu 13.04 will be called Raring Ringtail, emphasize mobile and battery life||Stefan Mileschin||WebNews||0||19th October 2012 08:20|
|HTC One X gets unofficial power management fix, boosts battery life 10 to 20 percent||Stefan Mileschin||WebNews||0||16th April 2012 08:03|
|Tested: Battery Life on the new iPad||Stefan Mileschin||WebNews||0||20th March 2012 09:31|
|iOS 5.0.1 Released to Fix Battery Life Issues||Stefan Mileschin||WebNews||0||11th November 2011 12:19|
|AMD vs. Intel: Battery Life Investigated||jmke||WebNews||0||6th August 2009 14:45|
|Netbook Battery Life Comparison||jmke||WebNews||2||12th April 2009 11:35|
|Battery Life: How Long Does a Battery Need to Last?||jmke||WebNews||1||14th November 2008 09:43|
|How To Extend Notebook battery Life||jmke||WebNews||1||5th February 2005 07:14|