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Improving Radio-Chip Efficiencies

Category: Science & Technology
Posted: 07:53AM
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Efficiency is important for just about all electronics, and that is not going to change any time soon. In fact if we do see the Internet of Things become a reality, efficiency is going to be key to connecting all of our various devices and appliances. To that end, researchers at MIT have developed a way to significantly improve the efficiency of radio chips by reducing off-state leakage.

Semiconductors are interesting electronic materials as they possess both conductive and insulating properties, which can be switched on and off. Because they are not perfect insulators, the transistors made of them can leak some energy when they are in their off-state. To improve the insulating properties, the researchers push a negative charge into a wire running across the transistor, as this stops the electrons that would otherwise leak out. A charge pump is used to create the negative charge.

As you may have guessed, this negative charge does take some power to produce, but at the cost of 20 picowatts, some 10,000 pW can be saved. If devices are going to start having sensors and transmitters built in to build an Internet of things, such efficiency will practically be a necessity.

Source: MIT



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