Electronics & Software

Here are innovative solutions for your biggest challenges in Electronics and Software - Power Supplies and Management, Board-Level Electronics, Components and Batteries. You’ll find applications essential to military, aviation, medical and automotive design engineering.

Briefs : Electronics & Computers
Fabrication of Thinned QWIP Arrays for Improved Performance

Focal-plane-array (FPA) hybrids of quantum-well infrared photodetectors (QWIPs) thinned to the membrane level are undergoing development. The developmental QWIPs in question are of the kind that exploit bound-to-quasi-bound absorption, as described, for example, in "Bound-to-Quasi-Bound...

Briefs : Electronics & Computers
Engine Monitoring Based on Normalized Vibration Spectra

An electronic engine-health-monitoring system is based on (1) computation of frequency-phase-normalized (FPN) spectra from the digitized outputs of vibration sensors and (2) the use of these spectra as feature vectors, which are presented to an artificial neural network for recognition of...

Briefs : Electronics & Computers
Embedded CMOS A/D Converters for High-Speed Operation

Sarnoff Corporation has announced the development of four new analog-to-digital (A/D) converter macro cells for embedding in CMOS designs in which high-precision, high-speed operation at low power is important. The 8-bit, 10-bit, 12-bit, and dual 6-bit designs are available for licensing by...

Briefs : Electronics & Computers
Parallel-Processing CDMA Detector With Neural Network

A proposed improved code-division multiple-access (CDMA) detector would achieve high resistance to jamming of weak ("far") received signals by strong ("near") ones. The problem of such jamming is called the "near/far problem," and resistance to such jamming is called "near/far resistance."...

Briefs : Electronics & Computers
Bound-to-Quasi-Bound Quantum-Well Infrared Photodetectors

Multiple-quantum-well AlxGa1 - xAs photodetectors that exploit transitions of electrons from quantum-well bound states to quasi-bound states are undergoing development for use at wavelengths from 6 to 25 µm. These photodetectors are intended to provide detectivities...

Briefs : Electronics & Computers
Sensor Combines Technologies to Achieve Application Versatility

By combining patented digital Silver-in-Glass® and analog conductive plastic technologies in a single environmentally sealed unibody package, Spectrol Electronics' DigiSense™ provides thousands of application-specific multifunction outputs (Figure 1). The conductive plastic...

Briefs : Electronics & Computers
"Smart" Camera for Precise Mapping and Targeting

A "smart" video camera, called the "GI-Eye," generates digital image data that are automatically tagged with georegistration meta-data to indicate the precise position and attitude of the camera when the image was taken. This automatic georegistration streamlines the processing of the digital...

Briefs : Electronics & Computers
Signal Preprocessor for Determining Time of Arrival

A proposed analog/digital circuit would improve the accuracy of determining the time of occurrence of a peak in an analog waveform. In the past, the time of occurrence of the peak was determined by comparing the magnitude of digital data samples. The time or clock pulse associated with the peak...

Briefs : Software
Simulation by Logical Modeling of Costs

The Simulation by Logical Modeling of Costs (SIBYL/COST) software subsystem is used by logistical and financial analysts to develop cost projections of labor and hardware requirements for preparation of space shuttle main engine (SSME) spares proposals, SSME program operating plans (POPs), and special...

Briefs : Electronics & Computers
Photochromic Image-Plane Filter Extends Dynamic Range of CCD

A simple technique for extending the dynamic range of a charge-coupled-device (CCD) video camera involves the use of photochromic material — the same material used in self-adjusting sunglasses. The dynamic range of an image is the ratio between the maximum and minimum brightness...

Briefs : Electronics & Computers
"Smart" Optoelectronic Sensor System for Recognizing Targets

The Viewing Imager/Gimballed Instrumentation Laboratory and Analog Neural Three-Dimensional Processing Experiment (VIGILANTE) is a "smart" optoelectronic sensor system that features ultrafast processing of image information for recognition and tracking of targets. VIGILANTE serves as...

Briefs : Electronics & Computers
Laser Doppler Velocimeter System for Use on Gas Turbines

A laser Doppler velocimeter (LDV) system has been developed for use on practical gas-turbine engines. The system has been used to measure inlet and exhaust velocities on an F-100 EMD engine from an F-15 airplane (see Figure 1). To perform this work successfully, it was necessary to...

Briefs : Electronics & Computers
Self-Checking Circuitry for Detecting Single-Event Latchups

High-performance electronic circuits would incorporate self-checking features for detection of radiation-induced single-event latchups (SELs), according to a proposal. The basic SEL-detection scheme calls for redundant circuitry and a current-voting scheme similar to voting schemes...

Briefs : Electronics & Computers
TRL Fixture for Cryogenic Testing of Microwave Components

A single-block fixture enables the rapid and accurate electrical characterization of planar microwave electronic components, by use of the through-reflect-line (TRL) technique, in air or in a vacuum at any temperature from ambient down to cryogenic temperatures. Heretofore, the TRL...

Briefs : Electronics & Computers
Stable Breakdown Obtained in Silicon Carbide Rectifiers

Experiments have revealed that stable breakdown-voltage characteristics can be achieved in silicon carbide rectifiers. Stable breakdown-voltage characteristics are essential to the ability to withstand overvoltage transients and are therefore necessary for reliability in high-power...

Briefs : Electronics & Computers
Single-Event Latchup Protection of Integrated Circuits

Many commercially available advanced-technology CMOS and bipolar integrated circuits are susceptible to single-event latchup (SEL) effects caused by heavy ions or protons from cosmic rays or solar flares, making them unsuitable for satellite applications. Remanufacturing the integrated...

Briefs : Electronics & Computers
Inverse Rectennas for Two-Way Wireless Power Transmission

The term "inverse rectenna" may seem like an oxymoron at first glance. However, preliminary experiments have demonstrated that a rectenna of suitable design can be made to operate in an inverse mode, in which radio-frequency (RF) power is generated in the rectenna rectifier circuits and...

Briefs : Electronics & Computers
Heat Pipes for Temperature Control in Electronics

As electronic circuits become more densely packaged and higher in power, maintaining them within permissible temperature ranges becomes a major issue. This is especially true in the case of such portable devices as laptop computers, cellular telephones, and other hand-held units. Cooling by a...

Briefs : Electronics & Computers
SQUID-Based Asymmetric Planar Gradiometer

Berkeley Laboratory researchers have demonstrated a novel superconducting gradiometer that helps to reduce ambient magnetic field noise generated by relatively distant sources in favor of tiny magnetic signals generated by a local source. This is another step toward the operation of SQUID-based...

Briefs : Electronics & Computers
GPS Drives Interactive Map Showing Position of Test Airplane

An electronic system that comprises airborne and ground-based subsystems generates data for a global real-time interactive map (GRIM) that displays the current position and velocity of the NASA F-18 Systems Research Aircraft (SRA). This system utilizes the Global Positioning System...

Briefs : Electronics & Computers
Training Neural Networks With Fewer Quantization Bits

A method for reducing the number of bits of quantization of synaptic weights during training of an artificial neural network involves the use of the cascade back-propagation learning algorithm. The development of neural networks of adequate synaptic-weight resolution in very-large-scale...

Briefs : Electronics & Computers
Terrestrial Portable Spacecraft-Mission-Support Stations

A data-communication and -processing network of compact, laptop-computer-based portable stations communicating via the World Wide Web (WWW) has been proposed as a relatively inexpensive end-to-end ground support system for future spacecraft missions. At present, end-to-end ground support...

Briefs : Electronics & Computers
Improved Two-Wavelength Focal-Plane Array of QWIPs

A focal-plane array (FPA) of GaAs-based quantum-well infrared photodetectors (QWIPs) that would detect images in two wavelength bands simultaneously is undergoing development. From ratios between image intensities at the two wavelengths, one can calculate the temperatures of imaged objects by...

Briefs : Electronics & Computers
Delta-Doped CCDs for Measuring Energies of Positive Ions

Research closely related to that reported in the preceding article has shown that δ-doped charge-coupled devices (CCDs) could be used to detect incident protons and perhaps other positive ions, and to measure the kinetic energies of the ions, down to about 1.25 keV. Prior to the...

Briefs : Electronics & Computers
Delta-Doped CCDs as Low-Energy-Particle Detectors

Charge-coupled devices (CCDs) of a type developed previously for imaging in ultraviolet light have been found to be useful as detectors of electrons and other charged particles with kinetic energies as low as about 100 eV. Heretofore, solid-state electronic devices have generally not been useful...

Briefs : Information Technology
Automated System for Acting on Findings From Inspections

The Automated Nonconformance System, based at Stennis Space Center, is a computer network dedicated to administration of inspections and repairs of rocket engines. This automated system was developed to replace a manual system in which paper documents were used to document the steps of...

Briefs : Information Technology
Computer Network for Management of Inspection Data

The Nondestructive Inspection and Evaluation Management System (NIMS), based at Stennis Space Center, is a computer network dedicated to administration of a large data base pertaining to nondestructive inspections of rocket-engine components. The NIMS serves as both an electronic archive of...

Briefs : Information Technology
Wavelet Processing for Aeroservoelastic-Stability Analysis

A wavelet-based modal-parameter-extraction procedure has been developed to augment wavelet filtering and thereby produce more-realistic, robust aeroservoelastic-stability margins. The procedure is intended for use in processing data from aircraft flight tests.

Briefs : Electronics & Computers
Hardware-Command-Decoding ASIC

A hardware-command-decoding application-specific integrated circuit (HCD ASIC) is designed to decode digital command signals transmitted from a ground station to a spacecraft (uplink commands). Implemented in the ASIC is a portion of the spacecraft uplinkprotocol specified in the widely used Consultative Committee...

Briefs : Electronics & Computers
Instrument Records Electric Fields Generated by Lightning

A portable, self-contained, compact instrument measures and records transient electric fields generated by nearby lightning strikes. This instrument complements, and in many respects is similar to, the one described in "Instrument Records Magnetic Fields Generated by Lightning"...

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