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High-level synthesis (HLS) is well capable of generating control and computation circuits for FPGA accelerators, but still requires sufficient human effort to tackle the challenge of memory and communication bottlenecks. One important approach for improving data locality is to apply loop tiling on memory-intensive loops. Loop tiling is a well-known compiler technique that partitions the iteration...
Identifying the technology trends, key patents to be aware of, the key players active in the field, the product areas that are heavily patented or scarcely addressed, and the focus of a company's competitors represent crucial aspects of developing a successful strategic plan, determining a company's freedom to make and sell their product, and focusing future research & product development efforts...
Mode division multiplexing is a promising technique that enables highly parallel and compact on-chip optical communications, but its scalability has been hampered by the crosstalk so far. By exploiting supermodes in closely packed waveguide arrays, low crosstalk between waveguides can be achieved when phase mismatch condition is met. This paper considers two techniques to achieve phase mismatch: waveguide...
Matrix multiplication is one of the most widely used computational kernels in scientific computing and machine learning. Using dedicated circuit for matrix multiplication can reduce the computational time and energy consumption. Traditional matrix multipliers always adopt linear array architecture, which works inefficiently when the size of matrix sub-block is much smaller than the array length. Using...
The authors stress the importance of photovoltaic module output difference in mega solar photovoltaic systems. The authors first describe modelling of the various types of the crystalline silicon photovoltaic modules and the maximum tracking point operation of the power conditioning system based on the experimental data. Then, the authors discuss the frequency of reverse current and voltage occurrence...
The Differential Absorption Hard X-ray (DAHX) spectrometer has been developed to diagnose photon energies above 80 keV and provides a time-resolved measurement of the x-ray spectrum from the plasma driven by Z. The DAHX spectrometer is a revitalization of the Hard X-Ray Spectrometer (HXRS) fielded on Z prior to refurbishment1. DAHX consists of an array of seven collimated silicon PIN diodes with varying...
We developed a flexible and penetrating microelecrode arrays (FPMA) and interconnection cables for neuronal signal recording. For successful implantation of FPMAs into various locations of the nervous system, FPMAs in different dimensions were fabricated using established fabrication process protocols in previous studies. Also, the interconnection cables based on parylene-C were designed and fabricated...
We present the low-cost microfabrication of three-dimensional Au nanotip pyramidal electrode array by selective and anisotropic etching η-type Si in tetramethylammonium hydroxide (TMAH) solution. The influence of the TMAH etchant concentration and bath temperature on the on lithographically patterned Si etch rate was investigated. Using buffer oxidize etching technique of thermal oxide, sputtered...
We have successfully integrated an amperometric ion sensor array on an Si chip which simultaneously detects potassium ion (K+) and sodium ion (Na+). The sensor array has two kinds of selective electrodes which exhibit high sensitivity for K+ over Na+ (K+-selective electrode) and for Na+ over K+ (Na+-selective electrode), respectively. Ion transfer voltammetry method was adopted for the detection of...
Nanowires (NWs) solar cells have the potential to outperform the thin-film counterparts in terms of optical absorptance. In this study a novel silicon nanowire (SiNW) array structure that has near-unity absorption spectrum is proposed. The design of the new SiNW array is based on inclusion of diverse radius nanowires with proper geometrical distribution in the array. The distribution of the NWs in...
Photodetectors based on organic semiconductors offer excellent sensitivity already with active layer thicknesses in the submicron range. High absorption coefficients together with processing temperatures below 150°C open possibilities for new form factors (e.g. flexible foil substrates) and integration on top of readout backplanes. In this work, we describe organic photodetectors (OPDs) with polymer...
Approximate computing has emerged as a circuit design technique that can reduce system power without significantly sacrificing the output quality in error-resilient applications. However, there are few approaches for systematically and efficiently determining the error introduced by approximate hardware units. This paper focuses on the development of error analysis techniques for approximate multipliers,...
The maximum power point tracking (MPPT) controller is a key part of the photovoltaic (PV) power generation systems, which has an important impact on the conversion efficiency of solar energy into electrical energy. Compared with silicon (Si) power device, silicon carbide (SiC) power device has the characteristics of low switching losses and high working frequency, which can realize the miniaturization...
A low cost 3-element sectorial fermi taper slot antenna configuration with sin-corrugation is designed at 28GHz. The elements can be illuminated individually based on the direction of the transmitter. In the proposed antenna structure each element produces a high gain of 15dB, a wide impedance bandwidth, a side-lobe levels less than -12.5dB, and an overall line of sight beam-width of +45 degrees....
This paper reviews our recent work on Si and SiGe THz sources that generate high-power coherent radiation. Our design approach blends the optimization of device operation near or above fmax with unconventional circuit topologies and energy-efficient electromagnetic structures. Using a 130-nm SiGe HBT process (fmax=3D280 GHz), our 320-GHz transmitter produces a record radiated power (3.3 mW) and DC-to-THz...
Through-silicon via (TSV) based 3-D ICs provide a promising solution for miniaturizing chips. However, thermal issue in 3-D ICs cannot be ignored. In this paper, we proposed a method based on 3-D transmission line matrix (3-D TLM) method to calculate heat generation in the lossy silicon substrate caused by TSV induced electrical field. Pseudo random bit sequences (PRBS) at different bit rates are...
In this paper an algorithm is described for obtaining the response of Power Distribution Networks (PDN) arising in chip, package or pcb during an early design phase. Results are provided for power grids arising in silicon interposers to validate the approach.
In this work, an efficient method is proposed to calculate the miniband structure and density of states for well-ordered Ge/Si-nanodisk array. Within the envelop-function framework, our approach surmounts theoretical approximations of the multi-dimensional Kronig-Penney method and provides a guideline for three-dimensional quantum dots design by simulating the effect of the interdot space on miniband...
We describe the most important aspects of Smart Antenna Array design and functionality and give details of the operational Smart Antenna breadboard designed at the Moscow National Research University of Electronic Technology (MIET) for spatial interference reduction, including a description and some experimental results from beamformed pattern measurements.
In this work, an efficient method is applied to calculate the miniband structure and density of states for well-ordered Ge/Si quantum dot (QD) array fabricated by combining the self-assemble bio-template and damage-free neutral beam etching. Within the envelop-function framework, this computational model surmounts theoretical approximations of the multi-dimensional Kronig-Penney method and the numerical...
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