Electrical/Electronics

Fibre Channel All-Flash Arrays

AccelStor (Taipei, Taiwan) announced the new NeoSapphire 3605 and NeoSapphire 3611, a pair of dedicated all-flash arrays with dual-port 16G Fibre Channel interfaces and sustained 360K IOPS for 4KB random writes. NeoSapphire 3605 offers 5TB usable capacity while NeoSapphire 3611 provides 11TB in a very compact 1U rack-mount form factor. The low latency and high reliability of Fibre Channel makes these new arrays ideal for demanding, time-critical applications including banking, finance, and media production. Reliability is further enhanced by hot-swappable drives and redundant power supplies.

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Posted in: Products, Electronics & Computers
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Teaching Computers to Understand Human Languages

Researchers at the University of Liverpool have developed a set of algorithms that will help teach computers to process and understand human languages.

While mastering natural language is easy for humans, it is something that computers have not yet been able to achieve. Humans understand language through a variety of ways – for example this might be through looking up words in a dictionary, or by associating it with words in the same sentence in a meaningful way. The algorithms will enable a computer to act in much the same way as a human would it encounters an unknown word. When the computer encounters a word it doesn’t recognize or understand, the algorithms mean it will look up the word in a dictionary (such as the WordNet), and try to guess what other words should appear with this unknown word in the text.

Posted in: Articles, Electronics & Computers
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High-Efficiency Power Amplifier Could Bring 5G Cell Phones

A new highly efficient power amplifier for electronics could help make possible next-generation cell phones, low-cost collision-avoidance radar for cars and lightweight microsatellites for communications. Fifth-generation, or 5G, mobile devices expected around 2019 will require improved power amplifiers operating at very high frequencies. The new phones will be designed to download and transmit data and videos faster than today's phones, provide better coverage, consume less power and meet the needs of an emerging "Internet of things" in which everyday objects have network connectivity, allowing them to send and receive data.

Posted in: Articles, Electronics & Computers
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Fast, Stretchy Circuits Could Yield New Wearable Electronics

The consumer marketplace is flooded with a lively assortment of smart wearable electronics that do everything from monitor vital signs, fitness or sun exposure to play music, charge other electronics or even purify the air around you — all wirelessly. Now, a team of University of Wisconsin—Madison engineers led by Zhenqiang “Jack” Ma, the Lynn H. Matthias Professor in Engineering and Vilas Distinguished Achievement Professor in electrical and computer engineering, has created the world’s fastest stretchable, wearable integrated circuits, an advance that could drive the Internet of Things and a much more connected, high-speed wireless world.

Posted in: Articles, Electronics & Computers
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Integrated Circuit for Radio Astronomy Correlators Supporting Large Arrays of Antennas

NASA’s Jet Propulsion Laboratory, Pasadena, California

Radio telescopes that employ arrays of many antennas are in operation, and ever-larger ones are being designed and proposed. Signals from the antennas are combined by cross-correlation. While the cost of most components of the telescope is proportional to the number of antennas, N, the cost and power consumption of cross-correlation are proportional to N2, and dominate at sufficiently large N. As radio telescopes get larger, there is a need to provide digital-signal-processing electronics that are smaller and less power-hungry than would be implied by the extrapolation of existing designs.

Posted in: Briefs, Electronics & Computers, Software, Antennas, Integrated circuits, Radio equipment, Antennas, Integrated circuits, Radio equipment
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Fabrication of Silicon-Leg Isolated Bi-Cr Thermopiles

Goddard Space Flight Center, Greenbelt, Maryland

The objective of this innovation was to develop a methodology of fabricating thermopile detectors using standard semiconductor fabrication techniques. The goal was to develop a fabrication process that minimized the roughening of the Si legs during patterning of the metallic couples, and to enable delineation of the Si legs without the use of highly toxic or carcinogenic chemicals. Another key requirement was at least 50% optical absorbance across the spectral band.

Posted in: Briefs, Electronics & Computers, Optics, Optics, Fabrication, Semiconductors, Silicon alloys
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Current Source Logic Gate

John H. Glenn Research Center, Cleveland, Ohio

High-temperature electronic integrated circuits have been demonstrated in silicon carbide (SiC) depletion mode MESFETs. This process is only capable of producing depletion mode n-channel MESFET transistors. With only this type of transistor, designing a logic gate is a challenge. A previous logic gate design that can be constructed in the current process has performed well. This invention improves upon the previous design by increasing output voltage range and decreasing the physical layout size of a logic gate. This logic gate circuit consists of depletion mode MESFET/JFET transistors and resistors that can be constructed with SiC depletion mode n-channel MESFETs.

Posted in: Briefs, Electronics & Computers, Integrated circuits, Switches, Transistors, Integrated circuits, Switches, Transistors
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Design of Double Layer Rectenna Array for Fault Isolation of Schottky Diode in Operation Beyond V-Band Frequencies

Langley Research Center, Hampton, Virginia

Microwave power transmission using rectenna technology has attracted a strong interest in conjunction with wireless electric power delivery to infrastructure and subjects located at a remote place. A typical rectenna, which is a major component of the wireless power transmission technology, consists of an antenna, a Schottky diode, and low-pass filters for low-frequency electromagnetic wave isolation in the device. To obtain high efficiency, an electromagnetic wave is collected through a high-resonance antenna, and the AC mode of coupled wave energy is delivered to a Schottky diode that rectifies AC power into DC power. By connecting rectennas in series or parallel, or in mixed way — as well as enlarging the receiving area — the rectenna array can capture microwave energy into a desirable mode of high power.

Posted in: Briefs, Electronics & Computers, Antennas, Capacitors, Antennas, Capacitors
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High-Bandwidth, Wide Field-of-View, Ultra-Sensitive, Radiation-Hardened, Short-Wave Infrared (SWIR) Receiver

Goddard Space Flight Center, Greenbelt, Maryland

Every LiDAR design faces the classic balancing act of signal versus noise. In order to maximize the range of a LiDAR, a receiver must amplify fractions of a micro-amp of photo current into a usable range for signal processing to occur, but without adding significant amounts of noise. Additionally, LiDAR receiver designs must exhibit very wide dynamic ranges because of the uncertainty in return signal amplitude. Meeting all these requirements in a small size, weight, and power form factor while keeping costs low is a major challenge.

Posted in: Briefs, Electronics, Electronics & Computers, Amplifiers, Lidar, Amplifiers, Lidar, Noise, Noise
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Magnetometer for Vectorized Field Sensing via Zero-Field, Spin-Dependent Recombination in Silicon Carbide Microelectronics

This self-calibrating, solid-state-based magnetometer is intended for miniaturized applications in high-temperature and high-radiation environments.

NASA’s Jet Propulsion Laboratory, Pasadena, California

The proposed technology involves the sensitive detection of magnetic fields using the zero-field, spin-dependent recombination (SDR) phenomenon that naturally arises from atomic-scale, deep-level defects intrinsic to silicon carbide (SiC) microelectronics. The SDR phenomenon enables the fabrication of SiC-based magnetic field sensing diodes that are ideal for the development of miniaturized and purely electrical-based magnetometers.

Posted in: Briefs, Electronics, Electronics & Computers, Microelectricmechanical device, Microelectromechanical devices, Microelectricmechanical device, Microelectromechanical devices, Magnetic materials, Test equipment and instrumentation
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