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It’s often said that supercapacitors are the future of energy storage, but for that statement to become reality, supercapacitor performance needs to increase greatly, and that is just what researchers at MIT have been working on. In a newly released study, researchers from MIT and a few other institutions have developed a novel class of liquids that could revolutionize how supercapacitors perform by increasing capacity by four or five times, improve reliability, and could reduce the risk o ...
  Previous blogs:   Experimenting with MOSFETS: Total Gate Charge Experimenting with MOSFETs: Transfer Characteristic   Introduction   More experimenting with MOSFETs. In the last blog I looked at the transfer characteristics but it wasn't very easy to see from the graph I plotted where the threshold was. The threshold is measured at a drain current of 250uA and that is down in the noise for the current probe I was using. So this is a different approach to finding the ...
By 2050, nearly half of the world’s electricity will be supplied by solar and wind, effectively putting an end to energy created by coal and gas. Owners of EVs will also be able to hook up their automobile to a power grid, transferring energy back and forth between cars and houses, allowing car owners to carry renewable energy wherever they go.   However, it requires storage battery systems. Switching from a system that supplies energy through power plants running on fossil fuels to ...
This is a short follow-up to Experimenting with MOSFETS: Total Gate Charge where I looked at 'total gate charge' for an IRF730, an n-channel power MOSFET.   Since I still had the test board wired up, I thought it might be interesting to see if could get a quick plot of the transfer characteristic - the way that the drain current varies with gate voltage.   I've taken the previous circuit, bypassed the constant current generator in the drain and then plotted the drain current against ...
Introduction   More experimenting, this time with MOSFETs.   If you've ever designed with a MOSFET, I'm sure you've seen the kind of curves that are usually present in the datasheet showing the relationship between the total gate charge and the gate voltage. Here's one such graph from a datasheet for a Vishay IRF730 device:   They always have the same sort of shape to the curve, though the position of the plateau, halfway up, varies in both voltage and the amount of charge to ...