34 research outputs found
Time interleaved counter analog to digital converters
The work explores extending time interleaving in A/D converters, by
applying a high-level of parallelism to one of the slowest and simplest types of
data-converters, the counter ADC. The motivation for the work is to realise
high-performance re-configurable A/D converters for use in multi-standard and
multi-PHY communication receivers with signal bandwidths in the 10s to 100s of
MHz. The counter ADC requires only a comparator, a ramp signal, and a
digital counter, where the comparator compares the sampled input against all
possible quantisation levels sequentially. This work explores arranging counter
ADCs in large time-interleaved arrays, building a Time Interleaved Counter
(TIC) ADC. The key to realising a TIC ADC is distributed sampling and a
global multi-phase ramp generator realised with a novel figure-of-8 rotating
resistor ring. Furthermore Counter ADCs allow for re-configurability between
effective sampling rate and resolution due to their sequential comparison of
reference levels in conversion. A prototype TIC ADC of 128-channels was
fabricated and measured in 0.13μm CMOS technology, where the same block can
be configured to operate as a 7-bit 1GS/s, 8-bit 500MS/s, or 9-bit 250MS/s dataconverter.
The ADC achieves a sub 400fJ/step FOM in all modes of
configuration
Silicon Integrated Arrays: From Microwave to IR
Integrated chips have enabled realization and mass production of complex systems in a small form factor. Through process miniaturization many novel applications in silicon photonics and electronic systems have been enabled. In this thesis I have provided several examples of innovations that are only enabled by integration. I have also demonstrated how electronics and photonics circuits can complement each other to achieve a system with superior performance.</p
3rd International Workshop on Instrumentation for Planetary Missions : October 24–27, 2016, Pasadena, California
The purpose of this workshop is to provide a forum for collaboration, exchange of ideas and information, and discussions in the area of the instruments, subsystems, and other payload-related technologies needed to address planetary science questions. The agenda will compose a broad survey of the current state-of-the-art and emerging capabilities in instrumentation available for future planetary missions.Universities Space Research Association (USRA); Lunar and Planetary Institute (LPI); Jet Propulsion Laboratory (JPL)Conveners: Sabrina Feldman, Jet Propulsion Laboratory, David Beaty, Jet Propulsion Laboratory ; Science Organizing Committee: Carlton Allen, Johnson Space Center (retired) [and 12 others
NASA Tech Briefs, April 1990
Topics: New Product Ideas; NASA TU Services; Electronic Components and Circuits; Electronic Systems; Physical Sciences; Materials; Computer Programs; Mechanics; Machinery; Fabrication Technology; Mathematics and Information Sciences
Topical Workshop on Electronics for Particle Physics
The purpose of the workshop was to present results and original concepts for electronics research and development relevant to particle physics experiments as well as accelerator and beam instrumentation at future facilities; to review the status of electronics for the LHC experiments; to identify and encourage common efforts for the development of electronics; and to promote information exchange and collaboration in the relevant engineering and physics communities
NASA Tech Briefs, December 1990
Topics: New Product Ideas; NASA TU Services; Electronic Components and Circuits; Electronic Systems; Physical Sciences; Materials; Computer Programs; Mechanics; Machinery; Fabrication Technology; Mathematics and Information Sciences; Life Sciences
Design of Front End Electronics and a Full Scale 4k Pixel Readout ASIC for the DSSC X-ray Detector at the European XFEL
The goal of this thesis was to design a large scale readout ASIC for the 1-Mega pixel DEPFET Sensor
with Signal Compression (DSSC) detector system which is being developed by an international
collaboration for the European XFEL (EuXFEL). Requirements for the DSSC detector include single
photon detection down to 0.5 keV combined with a large dynamic range of up to 10000 photons
at frame rates of up to 4.5 MHz. The detector core concepts include full parallel readout, signal
compression on the sensor or ASIC level, filtering, immediate digitization and local storage within the
pixel. The DSSC is a hybrid pixel detector, each sensor pixel mates to a dedicated ASIC pixel, which
includes the entire specified signal processing chain along with auxiliary circuits. One ASIC comprises
4096 pixels and a full periphery including biasing and digital control. This thesis presents the design
of the ASIC, its components and integration are decribed in detail. Emphasis is put on the design of
the analog front-end. The first full format ASIC (F1) has been fabricated within the scope of this
thesis along with numerous test chips. Furthermore, the EuXFEL and the DSSC detector system are
presented to create the context for the ASIC, which is the core topic of this thesis
Cumulative index to NASA Tech Briefs, 1986-1990, volumes 10-14
Tech Briefs are short announcements of new technology derived from the R&D activities of the National Aeronautics and Space Administration. These briefs emphasize information considered likely to be transferrable across industrial, regional, or disciplinary lines and are issued to encourage commercial application. This cumulative index of Tech Briefs contains abstracts and four indexes (subject, personal author, originating center, and Tech Brief number) and covers the period 1986 to 1990. The abstract section is organized by the following subject categories: electronic components and circuits, electronic systems, physical sciences, materials, computer programs, life sciences, mechanics, machinery, fabrication technology, and mathematics and information sciences
NASA Tech Briefs, December 1988
This month's technical section includes forecasts for 1989 and beyond by NASA experts in the following fields: Integrated Circuits; Communications; Computational Fluid Dynamics; Ceramics; Image Processing; Sensors; Dynamic Power; Superconductivity; Artificial Intelligence; and Flow Cytometry. The quotes provide a brief overview of emerging trends, and describe inventions and innovations being developed by NASA, other government agencies, and private industry that could make a significant impact in coming years. A second bonus feature in this month's issue is the expanded subject index that begins on page 98. The index contains cross-referenced listings for all technical briefs appearing in NASA Tech Briefs during 1988
Design/cost tradeoff studies. Appendix A. Supporting analyses and tradeoffs, book 1. Earth Observatory Satellite system definition study (EOS)
A listing of the Earth Observatory Satellite (EOS) candidate missions is presented for use as a baseline in describing the EOS payloads. The missions are identified in terms of first, second, and third generation payloads. The specific applications of the EOS satellites are defined. The subjects considered are: (1) orbit analysis, (2) space shuttle interfaces, (3) thematic mapping subsystem, (4) high resolution pointable imager subsystem, (5) the data collection system, (6) the synthetic aperture radar, (7) the passive multichannel microwave radiometer, and (8) the wideband communications and handling equipment. Illustrations of the satellite and launch vehicle configurations are provided. Block diagrams of the electronic circuits are included