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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 415 records · Page 23

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NASA NTRS2004

Spiral Chip Implantable Radiator and Printed Loop External Receptor for RF Telemetry in Bio-Sensor Systems

The paper describes the operation of a patented wireless RF telemetry system, consisting of a bio-MEMS implantable sensor and an external hand held unit, operating over the frequency range of few hundreds of MHz. A MEMS capacitive pressure sensor integrated with a miniature inductor/antenna together constitute the implantable sensor. Signal processing circuits collocated with a printed loop antenna together form the hand held unit, capable of inductively powering and also receiving the telemetry signals from the sensor. The paper in addition, demonstrates a technique to enhance the quality factor and inductance of the inductor in the presence of a lower ground plane and also presents the radiation characteristics of the loop antenna.

Simons, Rainee N.↗

NASA NTRS2005

MEMS Direct Chip Attach Packaging Methodologies and Apparatuses for Harsh Environments

Methods of bulk manufacturing high temperature sensor sub-assembly packages are disclosed and claimed. Sensors are sandwiched between a top cover and a bottom cover so as to enable the peripheries of the top covers, sensors and bottom covers to be sealed and bound securely together are disclosed and claimed. Sensors are placed on the bottom covers leaving the periphery of the bottom cover exposed. Likewise, top covers are placed on the sensors leaving the periphery of the sensor exposed. Individual sensor sub- assemblies are inserted into final packaging elements which are also disclosed and claimed. Methods of directly attach- ing wires or pins to contact pads on the sensors are disclosed and claimed. Sensors, such as pressure sensors and accelerometers, and headers made out of silicon carbide and aluminum nitride are disclosed and claimed. Reference cavities are formed in some embodiments disclosed and claimed herein where top covers are not employed.

Okojie, Robert S.↗

NASA NTRS2004

Real time on-chip sequential adaptive principal component analysis for data feature extraction and image compression

In this paper, we present a new, simple, and optimized hardware architecture sequential learning technique for adaptive Principle Component Analysis (PCA) which will help optimize the hardware implementation in VLSI and to overcome the difficulties of the traditional gradient descent in learning convergence and hardware implementation.

PCA feature extraction image compression real time↗

NASA NTRS2003

From chips to (space)ships: status of solid-state LO sources for THz receivers

An overview of the current state-of-the-art of the local oscillator technology will be presented along with highlighting future trends and challenges.

Schottky diode multipliers↗

NASA NTRS2001

Study of catastrophic latchup in the DSP2100 signal processor chip for MLS

This report summarizes the results of a series of tests to characterize catastrophic radiation-induced latchup in the DSP2100, which is used in three different applications on MLS.

latchup heavy ion↗

NASA NTRS2001

Update on JPL-led CSP/SIP activities (chip scale package/systems-in-a-package)

Explore the source record for details and available documents.

chipscale package solder joint reliability area ar↗

NASA NTRS2001

Temperature Remote I/O (TRIO) chip and TRIO Assembly Slice (TAS)

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TRIO TAS Temperature Remote I/O↗

NASA NTRS1999

Microscope-on-Chip Using Micro-Channel and Solid State

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microscope micro-channel image sensor optical micr↗

NASA NTRS1996

Gas Sensor Test Chip

The use of organic polymers to detect gasses has been known for several years to be an effective means for gas detection via conductivity changes. These chemoresistors offer significant advantages over other gas detectors in that they operate near room temperature and thus can be used in compact, low-power applications.

organic polymers sheet resistance conduction aniso↗

NASA NTRS1996

Chip-Sized Radiation Monitor

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Nuclear medicine and industry Clementine mission↗

NASA NTRS1995

Apacecraft Uplink, Downlink, and Intercommunications in a Space-Qualified ASIC Chip Set

This paper describes the functionality of four application specific integrated circuits (ASICs) developed for the Cassini spacecraft.

application specific integrated circuits (ASICs) u↗

NASA NTRS1994

Low Power Analog Neurosynapse Chips for a 3-D 'Sugarcube' Neuroprocessor

Object discrimination and patttern recognition are computationally intensive and for many defense and commercial applications, speed is of the essence.

3-D VLSI architecture reconfigurable multilayer pe↗

NASA NTRS2001

NASA's system on a chip technology program

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silicon on insulator SOI↗

NASA NTRS1999

A Smart CMOS Imager with On-Chip High Speed Windowed Controiding Capability

Low-power, high-speed, accurate computation of centroid from a pre-defined window in the image plane is important for a number of space-based and commercial applications.

active pixel sensor APS CMOS centroiding passive c↗

NASA NTRS1999

MMIC Power Amplifier Chip Set Developed for 70-115 GHz

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MMIC power amplifier THz range HEMT process↗

NASA NTRS1999

Evolution of CMOS Circuits in Simulations and Directly in Hardware on a Programmable Chip

The paper introduces an approach to automated synthesis of CMOS circuits, based on evolution on a Programmable Transistor Array (PTA).

evolvable hardware reconfigurable hardware genetic↗

NASA NTRS1999

A Low-Power digital Camera-On-A-Chip Implemented in CMOS Active Pixel Approach

For more than three decades now, CMOS technology has been the backbone behind the phenomenal advances in low-cost, low-power, reliable, highly integrated and miniaturized system development.

Electronic Shutter CMOS Imager APS↗

NASA NTRS1993

Learning to Classify Map Data with Cascaded VLSI Neural Network Building Block Chips

Paper maps are an important but unwieldy data format. To increase its utility, copious amounts of map data have been scanned into a digital map knowledge base. The next task in this knowledge base is to reduce this data to its underlying feature form suitable for analysis.

VLSI Neural Network Map Data↗