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We demonstrate a frequency-domain modulation spectroscopy system in the terahertz (THz) range based on the self-heterodyne technique to enhance the sensitivity of the small spectral change measurement. To evaluate the effectiveness of our system, we measured absorption of the THz wave caused by photo-induced free carriers generated in a high-resistive (4000 Ωcm) Si substrate. The 400-μm-thick Si substrate...
We review our recent development of germanium on silicon avalanche photodiodes (Ge/Si APDs). Our Ge/Si APDs, manufactured by a standard CMOS commercial foundry, satisfy the requirements of various optical communication systems from 10Gb/s to 25Gb/s.
Due to the recent 3He shortage, numerous alternative neutron conversion materials have emerged as potential 3He replacements. One such material is lithium-borosilicate aerogel which, unlike substrates coated with a neutron conversion material, is composed of the neutron conversion materials (Li and B) which are contained within the aerogel structural matrix. Additionally, silica-based aerogels can...
Microstructured semiconductor neutron detectors (MSNDs) represent a compact, low-cost, high-efficiency means of solid-state thermal neutron detection. Trenches are etched into a 1-cm2 or 4-cm2 active area pn-junction diode and backfilled with 6LiF neutron converting material. Charged-particle reaction products produced from neutron capture within the conversion material can be measured to indicate...
PET is the most sensitive imaging technique in the field of nuclear medicine. However, the singles count rate is typically 10 times higher than the coincidence count rate even for positron emitters. This means that there are a lot of pairs of undetected annihilation photons. For single gamma imaging, Compton imaging is known as the only method to obtain directional information of an incoming gamma...
Inadequate voltage control occurs when the controlling variable and controlled voltage of a control device are inversely related (i.e., not related in the usual way), potentially adversely affecting the system voltage level. This special situation can be identified by analyzing the elements of a sensitivity matrix constructed to show the relationship between the system control variables. Analysis...
The results of optimization of magnetically sensitive element Field Hall sensor based on the MIS structure formed on a "silicon-on-insulator" (SOI LSF) parameters was presented. Main characteristics of device structure were defined using the results of Silvaco software simulation.
Bayesian Networks have various applications including medical and technical diagnosis, financial scoring, and target behavior/pattern recognition. Bayesian Classification Networks fuse evidence from heterogeneous and homogeneous sources and calculate classification results. For many reasons, pieces of evidence from different sources can carry apparently contradicting information and in these cases...
Several cases differences SEL sensitivity in IC's with same crystals marking are presented and discussed. The crystals are compared visually and identical crystal markings confirmed
In this paper, we designed a group of horizontal Hall sensors in 0.35 µm BCD (bipolar/CMOS/DMOS) technology. Compared with the existing Hall devices, the design has improvement in parts such as Hall cell parameter set and layout design under BCD technology. And then the Hall chip is taped out. The results from the precise experiment of the Hall cell verify the optimization method which can be used...
In this paper, fundamental theories in developing piezoresistive pressure sensor will be discussed and our work on designing a foot plantar measurement system as the application will be explained. The mathematical equations and design procedures will be elaborate while the practical application will be investigate, experimented and analyzed. Simulation results from design theory will also be included...
Biosensors become a main attraction nowadays due to its importance towards human health. Its allow rapid and label-free detection that provides low cost clinical sampling. A FET device was fabricated from silicon-on-insulator (SOI) type of wafer with titanium dioxide (TiO2) thin film as a sensing medium. TiO2 was deposited by using sol-gel solution, spin coated on the device, patterned and anneal...
A systematic design procedure suited to integrate rigid body and aeroelastic control objectives within the mixed sensitivity framework is proposed for a two-degrees-of-freedom control configuration. It is based on a modal representation and combines stability augmentation, structural mode control and maneuver demand in a single linear parameter-varying (LPV) controller. To demonstrate applicability,...
In this paper, we present a generalized mixed-sensitivity multivariable framework for linear time invariant (LTI) plants that can handle a broad class of closed loop (e.g. ℋ∞, ℋ2, frequency- and time domain) objectives while being able to directly and systematically address the problem of trading off properties at distinct loop breaking points. This is done by exploiting the Youla-Jabr-Bongiorno-Kucera-Zames...
For academic writing, elaborating an argument particularly addressing an argument strength is important to establish causal relations between sentences. However, when an argument becomes large or complex, elaborating an argument considering the argument strength is difficult. To solve this problem, this article presents a proposal for an argument elaboration support system using a Bayesian network...
This simulation work studies whether optimal wafer and channel orientations exist that maximize the mobility of 10 nm-node strained-silicon FinFETs. For NFinFETs, strain-relaxed buffers or source/drain stressors yield the highest mobilities on rotated-notch wafers. For PFinFETs, industry-standard directions give the highest mobilities when using Si1−yCy strain-relaxed buffers as a stress booster....
This paper demonstrates the use of an amplifier to strengthen the horizontal magnetic field of parallel vertical Hall-effect device (VHD). In this study, parallel VHD structure is used to reduce the cross-coupled noise. The guard ring is used to confine the conductive channel width for better device sensitivity. The sensitivity of the parallel VHD can be improved by using an amplifier, which amplifies...
This paper describes a comparative study of sensitivity and non-linearity of conventional and bossed diaphragm piezoresistive pressure sensor along with a performance enhanced design. The proposed structures take into consideration corner compensation to avoid distortion of the mesa structure during fabrication of bossed diaphragm structure using wet bulk micromachining. Optimum piezoresistors locations...
Pressure microsensors are very frequently used for applications encompassing a wide range of operating pressure ranges. However, it is possible to use the same pressure sensor for different operating ranges (in a limited range) with satisfactory performance. In this work, we report the possibility of using a single sensor for different pressure ranges. Operating the sensor at a lower pressure range...
The pressure sensor is a key device in many mechatronic systems for automotive and industrial applications. We represent the piezoresitive pressure sensor based on the single crystal silicon strain gauges, which are glass-fused to the stainless steel diaphragm at high temperature. The silicon bulkmicromachined strain gauges have the through holes and the closed structure, unlike the current competitive...
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