New technologies in power supplies and management, board-level electronics, electronics and computers, and battery systems provide wide-ranging applications essential to military, aviation, medical, and automotive.

"Free-Space Optical Communications Analysis Software" (FOCAS) is the name of a spreadsheet computer program for analysis of direct-detection (as distinguished from...

Briefs: Electronics & Computers
Ferroelectric Electronic Scan Antennas

Most current radar scanning antennas utilize mechanical scanning, relying on a gimbal, motor, and gear arrangements to physically rotate/elevate the antenna. This technique is slow, gravity-sensitive,...

A technique for adjusting the resonance frequency of a single-mode round cylindrical microwave cavity has been proposed to maximize the transfer of power from a magnetron to one or...

Sponsored by a NASA Small Business Innovation Research (SBIR) Phase II contract, MetroLaser, Inc., has developed a novel, compact and low-cost laser Doppler vibrometer (LDV) under...

Briefs: Electronics & Computers
Micromachined Photodiode/Bolometer Arrays

Micromachined planar arrays of detectors that could operate either as photodiodes or as bolometers have been proposed for use in detecting photons in applications in which broad spectral responses are required. The availability of either of the two modes would enable operation throughout the spectrum,...

The term "space cube" denotes a scheme for three-dimensional stacking and interconnection of electronic-circuit modules. [This scheme should not be confused with a related one...

Briefs: Electronics & Computers
Improved Electron-Tunneling Magnetometer

Efforts are underway to develop an electron-tunneling magnetometer with a "planarized" (as explained below) design. Older designs of electron-tunneling magnetometers are more three-dimensional in...

Multiple-beam transmission has been proposed to reduce the deleterious effects of atmospheric turbulence on free-space laser communications - especially on uplinks from ground stations to...

An application-specific integrated circuit (ASIC) has been developed as a prototype of neuroprocessors for real-time diagnosis and control of automotive engines. The application of...

Briefs: Electronics & Computers
Development of Circuitry for Wristband Radio Transponders

A document proposes the development of several alternative types of electronic circuits for wristband transponders for the system described in "Person-Locator System Based on Wristband Radio Transponders" (NPO-19280) NASA Tech Briefs, Vol. 19, No. 12 (December 1995), page 40. To...

Briefs: Electronics & Computers
Active-Pixel Sensors With "Winner-Take-All" Mode

Circuits to generate the intensity reading and the coordinates of the brightest pixel in each image would be added to imaging photodetector arrays of the active-pixel-sensor (APS) type,...

A program to demonstrate the feasibility of GaAs-based Kₐ-band power amplifiers has generated a number of technological advances. The goals of the program included (1) capability of...

The figure shows a complementary metal oxide/semiconductor (CMOS) integrated circuit that contains all of the electronic circuitry of a programmable active-pixel-sensor digital camera....

Circuits to generate analog or digital representations of the coordinates of the centers of mass of images would be added to imaging photodetector arrays of the active-pixel-sensor...

The Production Support Flight Control Computers (PSFCCs) are flight-control computers that are being developed by NASA in conjunction with the United States Navy. These computers...

A developmental electronic system that includes Global Positioning System (GPS) receivers is designed to track the relative position and velocity to two airplanes in real time. In...

A concept for optimizing the designs of two-wavelength GaAs-based quantum-well infrared photodetectors (QWIPs) could make it practical to use focal-plane arrays of QWIPs as image sensors...

Modules of electronic circuitry that perform the amplitude- and phase-control and the status-monitoring functions for eight-element (2 ×4) subarrays of K-band phased-array antennas...

An information-reduced carrier-synchronization (IRCS) system has been proposed for use in a coded binary-phase-shift-keying (BPSK) radio-communication receiver...

Briefs: Electronics & Computers
Micromachined Magnetostatic Switches

Magnetostatic switches — switches that open or close in response to magnetic fields — are being developed and fabricated using micromachining (MEMS) technology. These switches operate similarly to...

The figure illustrates aspects of a proposed switching protocol for optical packet data communication that would serve as an alternative to the older store-and-forward and header-first...

Briefs: Electronics & Computers
Automated Cargo-Tracking Transponders

Credit-card-sized electronic transponders have been proposed for use in tracking cargo anywhere on Earth. A transponder would be carried on a cargo container, where it would act as a "smart tag." The...

The figure schematically illustrates an optoelectronic apparatus that generates both an optical output and an electronic output (typically at frequencies in the range from hundreds...

A process being developed for ultrathin packaging of multiple integrated-circuit chips and associated microelectromechanical components makes it possible to fabricate a minimally...

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...

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...

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...

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...

Multiple-quantum-well AlxGa1 - xAs photodetectors that exploit transitions of electrons from quantum-well bound states to quasi-bound states are undergoing...

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