A5006898910- Radiation Effects in Electronics
- VLSI and Analog Circuit Testing
- Advanced Adaptive Filtering Techniques
- Digital Filter Design and Implementation
- Analog and Mixed-Signal Circuit Design
- Low-power high-performance VLSI design
- Structural Health Monitoring Techniques
- Microwave Engineering and Waveguides
- Distributed systems and fault tolerance
- Speech and Audio Processing
- Semiconductor materials and devices
- Advanced Power Amplifier Design
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Analysis
- Embedded Systems Design Techniques
- Advanced Wireless Communication Techniques
- Radio Frequency Integrated Circuit Design
- Advanced Data Compression Techniques
Sandia National Laboratories California
2021
University of California, Davis
1996-2015
Hewlett-Packard (United States)
2003
Recent studies have highlighted the rise in violence and criminal activities primarilyinvolving firearms. In response to growing demand for effective firearm detec-tion systems public safety applications, this paper explores advancements real-time object detection using Transformer-based models. Building on RT-DETRarchitecture its latest version, RT-DETR v2, we introduce improvements such asthe Bidirectional Feature Pyramid Network (BiFPN) enhanced small de-tection dynamic batch processing...
As technology trends keep pushing cell dimensions in semiconductors to smaller geometries and higher densities, modern digital systems are increasingly becoming more vulnerable reliability issues originated by soft errors. Various techniques used detect errors accomplished incorporating redundancy into the hardware or software, but penalty associated with added can be measured high cost of extra degradation performance for software-added redundancy. We proposing a technique that compromise...
Integration-technology feature shrink increases computing-system susceptibility to single-event effects (SEE). While modeling SEE faults will be critical, an integrated processor's scope makes physically correct computationally intractable. Without useful models, presilicon evaluation of fault-tolerance approaches becomes impossible. To incorporate accurate transistor-level at a system scope, we present multiscale simulation framework. Charge collection the 1) device level determines 2)...
An adaptive filter capable of tracking, eliminating, and enhancing narrow band signals is described. The system relies on the property Switched-Capacitors (SC) having pole frequencies proportional to sampling rate its switches. tracks peak spectral density function input signal by adapting clock switched-capacitors. A prototype was built using discrete components but it can also be realized in a CMOS integrated circuit.
Adaptive algorithms often involve the use of divide and square operations. Rather than implementing generic dividers multipliers in adaptive section for sample rate notch filter, authors have developed prototype architectures. They present a technique optimizing an implementation squarer. In reciprocal circuit presented, they show how numerator (scaling) can be easily incorporated into its design to achieve general purpose divider. Both realizations been demonstrated filter using Xilinx...
be used to drive cross-layer radiation hardening by design. We demonstrate the capabilities of this model with two case studies. First, we determine a D flip-flop’s sensitivity at transistor level on 14-nm FinFet technology, validating against published cross sections. Second, track and estimate faults in microprocessor without interlocked pipelined stages (MIPS) processor for Adams 90% worst environment an isotropic space environment.
Adaptive sample rate filtering has been shown to be effective in notch filter realization for removing narrowband push-to-talk interference. A prototype architecture is proposed application adaptive which capable of being reconfigured real-time. This features field programmable gate array (FPGA) devices and ROM, demonstrated on audio signals using an XC4000 BORG prototyping board. comparison made between the computational complexity that traditional techniques update coefficients. The...
A high-range switched-capacitor (SC) filter capable of tracking sinusoid signals without the need a reference is presented. The tracks sinusoids by adapting sampling clock switched-capacitors. An important feature this its ability to track in cases where frequency signal and center are off several octaves. This particularly useful applications were range frequencies very wide.
In future computer systems, we will need to increase the utilization ratio of existing hardware and software modules achieve desired efficiency maximum speed, minimum power usage, improved reliability. typical modules, once inputs system are ready, final values outputs become available after a certain amount time (called execution in delay hardware). While module is computing output values, it often considered as black box do not have access intermediate results produced by module. this...
As technology trends keep pushing transistor dimensions to smaller geometries and higher densities, the gains in reliability over past decades have started reverse due gradual increase soft error rates. Consumer applications that cannot afford hardware redundancy solutions reduce effects of errors, can find a cost effective alternative using time redundancy. The memory requirements needed for redundant execution system be minimized without compromising detection by signatures. proposed...
This paper presents a Butler Matrix with 8 input ports and output ports. It uses 3 dB branch line couplers, phase shifters, TNC coaxial connectors, all of them linked by means U-shape TEM transmission lines. The design is focused in high power (220 watts) application, low PIMP multipaction free criteria being used. Finally, optimization the mass figure also key goal. An Engineering Qualification Model was manufactured subjected to RF, environmental testing. Details as well test results are presented.
A 1.4-2.7 GHz monolithic vector modulator with continuous amplitude and phase control has been developed. Each state within a full 3600 range dynamic greater than 13 dB is generated by combining two from among three vectors variable 120° apart. The in for the performed sets of MESFETs working as dual-gate shift these obtained through LC filters over band. circuit will be used node Crossbar Beam Forming Network (CBFN).