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Bellows Assembly

Servometer® – PMG, LLC (Cedar Grove, NJ) has introduced an athermalization, or “atherm,” temperature-sensitive bellows assembly. The lightweight assemblies have thin-walled, electrodeposited nickel soldered to custom end pieces. The end pieces are filled with a working fluid and then sealed.

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DC/DC Converters

The QMJ Series of DC/DC converters from Contech (Concord, CA), a division of Calex, offers up to 20 Watts of fully regulated output power. The series offers a 4:1 input range with nominal input voltages of 24 VDC and 48 VDC. Single outputs offered are 3.3, 5, 12, and 15 VDC. Dual outputs are ±12 and ±15 VDC.

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MIL-STD-1553 PMC Card

The BU-65596F/M, a MIL-STD-1553 PMC card from Data Device Corporation (Bohemia, NY), uses DDC’s Enhanced Mini-ACE® ASIC core. The BU- 65596F/M incorporates Total-ACE® integrated terminals and includes over 62 million hours of in-service history. The high-MTBF, DO-254-certifiable card has up to 4 MIL-STD-1553 channels and 16 avionics discrete I/O, and is VITA 47 Class V3 rated for rugged environments.

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Digital Oscilloscope

Rigol Technologies (Oakwood Village, OH) has introduced the DS6000 series digital oscilloscope, featuring up to 1 GHz bandwidth, 1.5 GHz bandwidth differential, and single-ended active probes. The digital oscilloscopes use advanced waveform search, visualization, and replay to detect signal and device characteristics.

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Event-Driven Processor Programming

Almost since computers were invented, interrupts have been a common programming method to deal with real-time tasks. An interrupt causes a processor to stop the running task, and to execute an interrupt handler instead. The interrupt handler determines the cause of the interrupt, responds to the interrupt, whereupon control is restored to the original task. A simple example is an interrupt from a UART (a serial port) stating that a character has been received, and the interrupt handler will take the character from the UART and store it in a queue in memory for use by the main task.

Posted in: Articles, Articles, Electronics & Computers
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Extensible Processing Platforms: Giving Designers the Best of Both Worlds

Creating a new field programmable gate array is no small feat. FPGA vendors spend tens-of-thousands of man-hours simply researching markets to determine the feature set a given device will require and the silicon process that they will use to manufacture the device. This starts years before they embark on the ever more difficult task of actually designing the IC and the software to allow users to program it.

Posted in: Articles, Articles, Electronics & Computers, Design processes, Integrated circuits
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Rad-Hard FPGAs

The rad-hard and rad-tolerant reprogrammable Virtex®- 5QV FPGA from Xilinx (San Jose, CA) supports specified Total Ionizing Dose (TID) and characterized Single-Event Effects (SEE). The space-grade field programmable gate arrays are also optimized with embedded MPUs, embedded DSP elements, built-in Ethernet MAC blocks, and high-speed serial connectivity.

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Graphics Processor

AMD (Sunnyvale, CA) has introduced the AMD Radeon™ E6460 discrete graphics processor. With support for up to four simultaneous displays, the E6460 GPU enables an immersive experience with desktop-level 3D graphics and multimedia features. A 3D graphics engine and programmable shader architecture support Microsoft DirectX® 11 tech nology for graphics rendering. The unified video decoder also provides dual HD decode of H.264, VC-1, MPEG4, and MPEG2 compressed video streams.

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Spectrally Compliant Waveforms for Wideband Radar

Modern radars often require the use of wideband waveforms to perform high-resolution target imaging. In microwave systems, the bandwidth can be on the order of 1.5 GHz, while in UHF systems that typically operate between 200 and 500 MHz, the waveform bandwidth might exceed 200 MHz. A major issue in the operation of such systems is that they often overlap the spectrum used by other radars, and even the spectrum allocated for other types of systems such as communications and navigation devices.

Posted in: Application Briefs, Radar, Waveguides, Noise
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Multifunctional Vehicle Structural Health Monitoring with Piezoelectric Wafer Active Sensors

A novel structural health monitoring (SHM) concept of embedded nondestructive evaluation with piezoelectric wafer active sensors (PWAS) has been developed. PWAS can be structurally embedded as both individual probes and phased arrays. They can be placed inside closed cavities during fabrication/ overhaul (such as wing structures), and then be left in place for the life of the structure. The embedded nondestructive evaluation (NDE) concept opens new horizons for performing insitu damage detection and structural health monitoring of a multitude of thin-wall structures.

Posted in: Briefs, Physical Sciences, On-board diagnostics, Vehicle health management, Product development, Non-destructive tests
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