Electronics & Computers

Scientists Demonstrate Electrical Properties of Topological Insulators

Scientists at the U.S. Naval Research Laboratory (NRL) have demonstrated for the first time that one can electrically access the remarkable properties predicted for a topological insulator (TI). They used a ferromagnetic metal/tunnel barrier contact as a voltage probe to detect the spin polarization created in the topologically protected surface states when an unpolarized bias current is applied. This accomplishment identifies a successful electrical approach that provides direct access to the TI surface state spin system, significantly advances our fundamental understanding of this new quantum state, and enables utilization of the remarkable properties these materials offer for future technological applications.

Posted in: Electronics & Computers, Electronic Components, Board-Level Electronics, Power Management, Semiconductors & ICs, News

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Engineers Design Software Tools to Secure Tactical Smartphones

Suraj Kothari's talk of smartphone security quickly took a turn toward sabotage and worst-case scenarios. What happens, he asked, if a soldier's smartphone is hacked for its GPS data? What happens if an attacker drains the battery in a general's phone and essential communication is cut off? Or, what happens if a hacked phone provides false information during a military mission?

Posted in: Electronics & Computers, PCs/Portable Computers, Software, Defense, News

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Performance Characteristics of Digital Frequency Discriminators

Digital frequency discriminators are key components of instantaneous frequency measurement (IFM) receiver systems as well as many other complex electronic warfare (EW) systems. However, to obtain optimum results it is essential to match DFD performance levels to a specific application. DFDs are integral components of IFM receiver systems; they may also be imbedded into a wide range of military systems such as radar warning receivers (RWRs), electronic countermeasures (ECM) systems, and electronic support measures (ESM) platforms, where they help provide instantaneous frequency measurement capability.

Posted in: Electronics & Computers, White Papers

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Smartphones Become "Eye-Phones" to Capture Images of the Eye

Two inexpensive adapters enable a smartphone to capture high-quality images of the front and back of the eye, enabling users to share them securely with other health practitioners or store it in a patient's electronic record. The researchers see this technology as an opportunity to increase access to eye-care services as well as to improve the ability to advise on patient care remotely.

Posted in: Electronics & Computers, PCs/Portable Computers, Imaging, Medical, Patient Monitoring, Diagnostics, News

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Bending Light with a Tiny Chip

Imagine that you are in a meeting with coworkers or at a gathering of friends. You pull out your cell phone to show a presentation or a video on YouTube. But you don't use the tiny screen; your phone projects a bright, clear image onto a wall or a big screen. Such a technology may be on its way, thanks to a new light-bending silicon chip developed by researchers at Caltech.

Posted in: Electronics & Computers, Electronic Components, Board-Level Electronics, Photonics, Optics, Optical Components, Semiconductors & ICs, News

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Dual-Channel Electromechanical Shutter Driver (ESD)

This device controls the electromechanical shutter in a digital or photographic camera. This electronic device is designed to provide optimal control of an electromagnetically actuated shutter used on a digital or photographic camera. The SD36B1 Electromechanical Shutter Driver is designed to provide the drive pulses for opening and closing an electromagnetically actuated shutter. Electromechanical shutters are used when the exposure period for an electronic camera needs to be controlled outside of the range of electronic shuttering capabilities offered by the camera itself.

Posted in: Electronics & Computers, Briefs, TSP

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Sub-Nanosecond, Compact, Low-Power Time-Interval Measurement

This innovation is a sub-nanosecond time-interval measurement that is compact and inexpensive, implemented in a field-programmable gate array (FPGA). Currently, high-speed count ers or semi-custom or custom ASICs (application specific integrated circuits) are used for time-interval measurements. They are not nearly as powerful for automatic delay control for the environment (manufacturing, temperature, voltage, aging, and radiation).

Posted in: Electronics & Computers, Semiconductors & ICs, Briefs, TSP

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