Electronics & Computers

AC Coupled Interconnect for Low-Power Spaceborne Electronics

An AC coupled interconnect (ACCI) has been developed that could be used to create multiple solutions to contactless chip-to-chip communications. Assembly and testing of a 0.18 um bulk CMOS chip containing multiple circuit experiments were performed. Figure 1 shows the chip floorplan, chip layout for the wire bonded experiments, and a microscope photograph of the die. The experiments tested in this phase of measurements were located around the periphery of the die in the band designated in the die photo of Figure 1.

Posted in: Briefs, Electronics & Computers, Architecture, Integrated circuits, Wireless communication systems, Spacecraft
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Fuzzy System for Fault Diagnostics in Power Electronics-Based Brake-by-Wire System

Research in fuzzy diagnostics of brake-by-wire systems focuses on the power electronics switches, since they are often considered to be the weakest link in the system. The objective of fault diagnostics in the power electronics of the brake-by-wire system is to accurately locate any faults within the circuit as soon as they occur.

Posted in: Briefs, Electronics & Computers
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High-Voltage, High-Temperature Power Electronics Capacitor

A novel high- temperature, high- voltage power electronics capacitor incorporates materials of construction and electrical components that have been initially designed as a segment of an integral electronics component, package, or system to be subjected to harsh or high- temperature environments. The capacitor can withstand operating temperatures in excess of 300°C, while maintaining a capacitance between a fraction of 1 to several μFs.

Posted in: Briefs, Electronics & Computers
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Deciphering the New SUMIT™ Specification

The new SUMIT specification is managed by the Small Form Factor Special Interest Group (SFF-SIG). SFF-SIG is a newly formed, non-profit industry group that develops, promotes, and supports small form factor circuit board specifications and related technologies. The group embraces the latest technologies, but also has a philosophy of maintaining legacy compatibility and enabling smooth transitions to next-generation interfaces.

Posted in: Articles, Articles, Embedded Technology, Board-Level Electronics, Electronics & Computers, Computer software / hardware, People and personalities, Terminology
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Applying Cognitive Memory to Pattern Recognition

Whether you are involved in robotics or other domains, pattern recognition is essential to progress. A new device, called the CogniMem chip, offers a hardware solution to this problem. CogniMem can be considered a true Artificial Intelligence device because it has been designed specifically for the purpose of learning, memorizing and recognizing.

Posted in: Articles, Articles, Embedded Technology, Board-Level Electronics, Electronics & Computers, Artificial intelligence, Electronic equipment, Neural networks
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Direct Spray Liquid Cooling Systems

For decades military platforms have included electronics for avionics, vehicle controls, radios, radar, sonar and fire control. From a computational standpoint most of these systems could be accomplished with relatively low power devices. There have always been higher performance electronics for applications such as radar processing, Intelligence, Surveillance, and Re - connaissance (ISR) processing, and mission computing; however, high performance electronics were relegated to stationary, benign environments. Due to bandwidth limitations of secure communications between command centers and front line troops, trends to include these computationally intense applications on vehicles and aircraft exist. From airborne platforms such as U-2 Dragon Lady and Global Hawk operating up to 70,000 feet and -65°C, to a surface-to-air missile launcher mounted on a 5-ton truck called Medium Extended Air Defense System (MEADS) in a scorching +60°C desert, the military is deploying incredible performance in harsh environments. To fit on these military vehicles, the size, weight and power (SWaP) of the electronic systems are minimized to extend the range of airborne platforms or allow ground vehicle transport with a wider range of operation. Direct spray cooling systems are enabling these programs with minimal SWaP budgets and harsh environmental requirements to use lower cost, high performance embedded electronics.

Posted in: Articles, Articles, Embedded Technology, Board-Level Electronics, Electronics & Computers, Electronic equipment, Cooling, Durability, Reliability
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Optical Microwave-Signal-Channelization Technique Analyzed

In a recent study, a proposed technique for optical frequency-band channelization of a microwave signal or other wide-band radio signal in a receiver was analyzed and compared with prior electronic and acousto-optical techniques. In frequency-band channelization, which is commonly used in wide-band radio receivers, a received signal is divided into narrow frequency bands (channels) and the signal in each channel is detected by a relatively narrow-band sub-receiver. In principle, frequency-band channelization offers benefits of reduced noise bandwidth and processing gain in the narrowband sub-receivers, leading to increased sensitivity, such that the wide-receiver could have a sensitivity approaching that of a narrow-band receiver. The quality of the channelization ultimately determines the performance of the receiver.

Posted in: Briefs, Electronics & Computers
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High-Cycle Life Testing of RF MEMS Switches

The electromechanical, RF, and charging properties of an "air-gap" capacitive switch enable it to be utilized in high-cycle life testing. Monitoring both high-speed and low-speed switching characteristics provides insight into quantifying the lifetime properties of the switch, and enable estimation of switching lifetime under a variety of operating conditions.

Posted in: Briefs, Electronics & Computers
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Emerging Power and Energy Technologies for Portable Electronics

A report discusses data obtained for the Navy's Special Operations Command (SOCOM), which seeks a portable power/energy source capable of providing sufficient power and energy for complex missions at a minimal weight penalty. The report focuses on the specific energy of systems, defining the weight of the power/energy system that must be carried by the soldier.

Posted in: Briefs, Electronics & Computers
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VME NAS RAID Blade

ACT/Technico (Warminster, PA) now offers the VME RAIDStor, a single-slot 6U network attached storage (NAS) blade that provides the same automatic, transparent data replication and re-sync of traditional box-level RAID storage modules in a more compact footprint. With network access for up to 18 slots (up to 1/2 terabyte per slot) in a 19" chassis, the SATA-based VME RAIDStor is suitable for use throughout many industries in a number of high availability, data intensive applications including message processing, network- centric military environments, redundant self-hosted Web servers or storage repositories, as well as transaction processing and logging.

Posted in: Products, Products, Electronics & Computers
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