High electron mobility transistors reduce power supply size thanks to a special make-up that eliminates sources of energy loss. Andrea Bricconi | Wei Deng, Infineon Technologies AG It is an exciting time for power supply designers. We are learning how devices based on wide bandgap (WBG) materials such as silicon carbide (SiC) and gallium nitride-on-silicon […]
Power supply designers take a hard look at soft magnetics
The promise of high efficiency and small size brought by super-fast switching power supplies could be delayed by a lack of magnetic materials that are up to the task. Leland Teschler | Executive Editor Eyeball the schedule for APEC, considered the premier technical conference for power electronics, and you’ll notice a number of sessions devoted […]
Measuring Ethernet and WiFi transmissions
The Ethernet computer networking protocol is used in local area networks, metropolitan area networks and wide area networks. While the term is often used to distinguish wired data transmissions from Wi-Fi, both use parallel protocol details, notably 48-bit MAC address and Ethernet frame format. Actually, Wi-Fi is Ethernet over a different medium. There are a […]
Linear vs. switching power supplies: Not always an easy choice
There are some uses that demand the low noise and fast response only available through traditional linear supplies. ALEX KARAPETIAN | ACOPIAN TECHNICAL CO. ASK almost any engineer about linear power supplies and the likely instinctive reaction will be, “Sorry, I can’t use them — they’re too inefficient.” Any possibility of using a linear supply […]
DIY Artificial Intelligence
Machines are now faster and more accurate than humans at identifying information in images. Machines don’t get bored looking for flaws in widgets for hours at a time without a break. There’s been a lot of talk in the news about how Artificial Intelligence (AI) will replace jobs. The industrial revolution displaced thousands of people […]
Optical amplifiers, Part 2: Basic implementations
Part 1 of this FAQ began an overview into the arcane world of all-optical amplifiers including where and why they are needed. Part 2 will briefly describe the four types and identify the two most commonly used for optical-fiber link signal boosting. Q: How “accurate” will this presentation be? A: Frankly, it will have large-scale […]
Thermal Electric Generators, Part 2: Applications
Part 1 of this FAQ looked at the principles and components of a basic TEG system. Part 2 looks at some applications ranging from very small to large, and from scavenged auxiliary to primary power. Q: It seems like TEGs are costly and complicated, despite the simple principle of operation. Is this the case? A: […]
The difference between spontaneous emissions and stimulated emissions
The terms spontaneous emission and stimulated emission sometimes get confused. The term thermal emission sometimes gets thrown into the mix as well. Here are the basic definitions to help sort things out and the procedures for measuring these parameters. When we speak of spontaneous or stimulated emissions we are referring to atoms whose electrons are […]
Thermal electric generators, Part 1: Principles and implementation
TEGs – thermal electric generators – are used for energy harvesting and enhanced efficiency, as well as stand-alone primary power sources for both mundane and highly advanced situations. Every application needs a source of energy which can be “drawn down” to provide power for the system. Obviously, the easier and cheaper it is to get […]
Optical amplifiers, Part 1: Applications and considerations
We can now amplify electronic signals from low frequencies to the multi-GHz range without too much difficulty, but amplifying a stream of photons such as in an optical fiber has a very different meaning and is a challenge with no single or easy solution – but it is being done. Electronic and optics technologies are […]
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