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This paper presents a device-circuit co-design methodology for a DeMOS 5V GHz-speed high voltage level shifter. The limiting quasi-saturation effect is addressed by a codesign methodology. The co-design methodology is applied to the STI-DeMOS in a calibrated setup using experimental data. As a result, a 15% improvement in the speed is achieved for a high-performance level shifter circuit.
This study compares the back bias modulation rates of ultra-thin body and buried oxide, fully depleted silicon on insulator (UTBB FDSOI), bulk FinFET, and SOI FinFET Results show that UTBB FDSOI exhibits a two-order higher modulation rate for threshold voltage and considerably higher for transconductance modulation rate than that that of bulk FinFET. The SOI FinFETs generate an insignificant modulation...
Traditional analog fluxgate sensors have the shortcoming of being disturbed easily by the external environment. To overcome this shortcoming, a digital fluxgate system based on field programmable gate arrays (FPGAs) is described in this paper. The feasibility and accuracy of the system are verified by comparing with the magnetic field data of the geomagnetic stations in Ming Dynasty Tombs. Further...
Thin Film hulk acoustic wave resonators (FBARs) with relatively high Q-factor are considered good candidates to be used in the radio frequency module of chip-scale atomic clocks. In previous works, SiO2 thin film was introduced into the FBARs between the top electrode and piezoelectric layer which resulted in a good improvement in Q-factor about 350 after parameters optimization. Based on the same...
A method to determine key control-factors for low temperature synthesis of Graphene using Plasma-Enhanced CVD is demonstrated in this work. Fractional-Factorial experiments are performed in order to accurately determine the control-factors while keeping the number of experimental runs to minimum. Temperature, RF power and deposition time are found to be the important controlling factors on the basis...
We developed a novel high-throughput screening platform based on small-molecule microarrays (SMMs) and oblique-incidence reflectivity difference (OI-RD) microscope. OI-RD microscope is able to monitor tens of thousands of biomolecular interaction in a single experiment without the need to label any biomolecule. We also developed surface chemistry to prepare SMMs which is able to immobilize compounds...
A Heterojunction bipolar transistor (HBT) trigger Silicon Controlled Rectifier (SCR) device in a 0.35μm Silicon-germanium (SiGe) BiCMOS technology is proposed for Electrostatic Discharge (ESD) protection in this paper. The trigger voltage of the HBT trigger SCR (HTSCR) is decided by the collector-to-emitter breakdown voltage (BVCEO) of the HBT structure in floating base configuration. Compared to...
To improve the steering precision and angular resolution of liquid crystal optical phased array, in this paper, we proposed a modified periodic phase controlled method to realize a continuous scanning with a constant angular resolution of less than 20 μrad, meanwhile, its precision is less than 5 μrad (RMS). Also, another method we proposed is called sub-aperture coherence can realize even better...
A high-power Erbium/Ytterbium co-doped fiber amplifier (EYDFA) is designed, investigated. The signal gain and noise figure characteristics are studied. Also, a C-band Erbium doped fiber laser is proposed and investigated. The characteristics of fiber ring laser are measured and discussed.
Unlike isolated gold nanorods, we demonstrate that the peak wavelength of the linear optical absorption and the nonlinear one of a gold nanorod assembly can be different by strengthening the plasmonic coupling. We reveal that the strongly localized modes induced by random coupling play a crucial role in determining the optical absorption of the plasmonic systems.
Low-dimensional organic-inorganic halide perovskites (e.g., nanocrystals (NCs) and nanoplatelets (NPLs)) are the new kids on the block for potential nanoelectronic applications. Herein, the recombination dynamics of the photoexcited species in méthylammonium lead bromide (MAPbBr3) NCs and NPLs are probed using time-resolved photoluminescence spectroscopy. They exhibit distinct recombination lifetimes...
We review our recent results from optical spin orientation studies of In(Ga)As/GaAs quantum dots (QD) and QD molecular structures (QMSs), which shed light on some critical issues in spin injection and spin detection in these semiconductor nanostructures.
ESD protection circuit is a significant peripheral circuit to ensure the reliability of the chip. Whole chip ESD protection design of CMOS chips with large chip area and multiple power domains is a difficult point in ESD protection design. A whole chip ESD protection design for a 16-channel 16-bit D/A converter with multiple power domains under 0.6um CMOS processis carried out. The final experiment...
ESD protection plays an important role in integrated circuits. ICs used in space require radiation-hardened capability, which is sometimes in conflict with ESD protection performance. In this paper, An RS485 driver with both excellent ESD and radiation-hard protections is proposed. The proposed driver was implemented with an 0.6μm SOI CMOS process with circuit design and protection strategy optimizations...
In this work, hexagonal barium ferrite thin films have been deposited on Pt(111)/Al2O3(0001) substrates by pulsed laser deposition. The thickness of Pt dependence of crystallographic structure and magnetic properties have been studied. X-ray diffraction 0–20 and pole figure analysis reveal that the crystallinity of films was greatly improved and highest degree of orientation was prepared under 20nm...
Amorphous indium tin oxide thin films on polymers exhibit an interesting substrate morphology effect on conductivity, optical transition types and band structure. The relation between conductivity and surface roughness is well explained by a simplified film system model with a square potential. The transition types originated from the optical transmittance spectra is found to be inconsistent in ITO...
This paper presents a new architecture and circuit implementation of low-cost power analysis-immune SMS4. The general data masking scheme is used in the liner operations of SMS4, such as cyclic left shift and exclusive OR. For the nonliner operation, inhomogeneous S-boxes instead of fixed S-boxes are designed, which show different power consumption curves. The permutation of S-boxes is determined...
High-frequency soft magnetic multilayer films with well-defined laminated structure were fabricated by alternating magnetron sputtering at room temperature with no external magnetic field applied. The satisfactory high-frequency magnetic properties and high resistivity were obtained even if the total thickness of the multilayer film increased to micro level. When used as magnetic core, these high-frequency...
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