Electronics & Semiconductors
Imagine a thin, digital display so flexible that you can wrap it around your wrist, fold it in any direction, or curve it over your car's steering wheel. Researchers at the Pritzker School of Molecular Engineering (PME) at ...
Apr 13, 2023
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90
Electronics & Semiconductors
Scientists from Sandia National Laboratories have announced a tiny, electronic device that can shunt excess electricity within a few billionths of a second while operating at a record-breaking 6,400 volts—a significant ...
Mar 15, 2022
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547
Energy & Green Tech
Along with bitterly cold temperatures, winter usually brings dry air and the occasional zap of static electricity. Those shocks might be annoying, but researchers are working to harness that otherwise wasted energy with triboelectric ...
Nov 21, 2022
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38
Energy & Green Tech
Back in May, Steven Shankland in CNET said that, for the lighting business, "the next technology is coming: OLED (organic light-emitting diode) lighting. It replaces the small, bright dots of LEDs with sheets of light that ...
Energy & Green Tech
When someone thinks about knitting, they usually don't conjure up an image of sweaters and scarves made of yarn that can power watches and lights. But that's just what one group is reporting in ACS Nano. They have developed ...
Mar 28, 2018
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Engineering
The latest development in textiles and fibers is a kind of soft hardware that you can wear: cloth that has electronic devices built right into it.
Aug 8, 2018
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293
Electronics & Semiconductors
A team of South Korean scientists led by Professor KIM Dae-Hyeong of the Center for Nanoparticle Research within the Institute for Basic Science has pioneered a novel approach to stretchable displays. The team announced the ...
Apr 15, 2024
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Consumer & Gadgets
Anyone following tech stories from month to month will recognize LG Display as those tech people focused on "bendy" and "rollable" displays, bolstered by the company's aggressive attention toward novel organic light-emitting ...
Electronics & Semiconductors
Silicon (Si) semiconductors are ubiquitous in electrical appliances and play an essential role in our daily lives. However, in high-temperature environments exceeding 300°C, such as underground resource drilling, space exploration, ...
Jul 20, 2023
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Electronics & Semiconductors
Climate change and its consequences are becoming increasingly obvious, and solar cells that convert the sun's energy into electricity will play a key role in the world's future energy supply.
Oct 26, 2021
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532
In electronics, a diode is a two-terminal device (thermionic diodes may also have one or two ancillary terminals for a heater).
Diodes have two active electrodes between which the signal of interest may flow, and most are used for their unidirectional electric current property. The varicap diode is used as an electrically adjustable capacitor.
The unidirectionality most diodes exhibit is sometimes generically called the rectifying property. The most common function of a diode is to allow an electric current in one direction (called the forward biased condition) and to block the current in the opposite direction (the reverse biased condition). Thus, the diode can be thought of as an electronic version of a check valve.
Real diodes do not display such a perfect on-off directionality but have a more complex non-linear electrical characteristic, which depends on the particular type of diode technology. Diodes also have many other functions in which they are not designed to operate in this on-off manner.
Early diodes included “cat’s whisker” crystals and vacuum tube devices (also called thermionic valves). Today most diodes are made of silicon, but other semiconductors such a germanium are sometimes used.
This text uses material from Wikipedia, licensed under CC BY-SA
