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This paper is devoted to the semiglobal finite-time stabilization via output-feedback for a class of uncertain highorder planar nonlinear systems. The systems under investigation contain unknown control coefficients and possess more serious nonlinearities. In this paper, with the assumption that all the system states are available for feedback, a state-feedback controller is first constructed by adding...
We propose a new approach to an on-chip clock distribution scheme. It is based on distributed multi-GHz LC-tank oscillators generating local clocks. The oscillators are mutually coupled to align their frequencies and are further subharmonically injection-locked to a much lower frequency reference to align their phases. The final phase calibration is via adjusting their self-resonant frequencies. We...
This paper proposes an ultra-low-voltage (ULV) fractional-N all-digital PLL (ADPLL) powered from a single 0.5 V supply. While its DCO runs directly at 0.5 V, a switched-capacitor DC-DC converter doubles the supply voltage to all the digital circuitry and regulates the TDC supply to stabilize its resolution thus maintaining fixed inband phase noise (PN) across PVT. The ADPLL supports a 2-point modulation...
Typically, the circuit realization of synchronization is to impose an external signal which is periodic on the response system. Herein we propose a novel study which is different from the previous methods using feedback to achieve synchronization. Our work is to make the individual inductance of two Chua's circuit systems produce mutual inductance effect, and achieve bidirectional coupling of two...
In this work we present experimental observation of self-mixing laser Doppler velocimetry (LDV) with laser-diode-pumped single-mode microchip Nd:YAG laser. The temporal waveforms are detected by oscilloscope, and proceed with Fourier transform spectrum analysis and local maximum analysis. The result displays the period transformation of intensity fluctuation which is observed via spectrum analysis...
The health management for aircraft system is difficult problem when the system is rife with nonlinear/non-Gaussian time evolution, the model parameters and sensors measurements are subject to uncertainty, and the diagnosis task suffers from some real-time constrains. This paper discusses the most relatively recent researches about Bayesian probability model, which focuses on the Bayesian networks...
The effects of an intentional interface engineering of a heterogeneous CeO2-Nb:SrTiO3 interface on the resistive switching behaviors of HfO2-based resistive random access memory (RRAM) has been investigated. Switching parameters including set voltage, reset voltage, low resistance state and high resistance state, are greatly improved by the interface engineering. Besides, low power consumption RRAM,...
A compact quad-band equal power divider (PD) based on quad-mode stub loaded resonators (SLRs) and conventional Wilkinson power divider is proposed in this paper. The proposed SLR, analyzed by even/odd mode analysis method, can introduce four narrow passbands and provide more degrees of freedom to tune the resonant frequencies. A prototype of a quad-band equal PD centred at 1.5, 2.5, 3.5 and 5.2 GHz...
A novel 5.8 GHz band-notched wideband balanced bandpass filter (BPF) is proposed in this paper, which obtains favorable uniform differential-mode (DM) response and good common-mode suppression. The proposed differential-mode BPF is comprised of a four-stage branch-line structure with one pair of open-circuited stubs in the symmetrical plane. Two coupled SIRs are employed to generate one desired notched...
A novel impedance matching method of a helix antenna is proposed in this paper. The conventional impedance matching of a helix antenna is based on the method of adjusting the thickness of the substrate and making a tapered transition between the helix antenna and the coaxial cable. However, these methods are not easy to be controlled. This paper designed an improved impedance matching method, using...
We present a new ultra-low-power (ULP) transceiver for Internet-of-Things (IoT) optimized for 28-nm CMOS. The receiver (RX) employs a high-rate (up to 10 GS/s) discrete-time (DT) architecture with intermediate frequency (IF) placed beyond the 1/f noise corner of MOS devices. New multistage multi-rate charge-sharing bandpass filters are adapted to achieve high out-of-band linearity, low noise and low...
A single-layer wideband reflectarray antenna employing sub-wavelength phase-shifting elements is presented. The element is composed of double concentric square meander line rings and its size is a fifth of a wavelength. By changing the length of the meander line, a phase variation range of about 360° is achieved with an almost constant slop across the 9 to 11 GHz. Using this element, a 48 × 48 — element...
With the generalizing of Electronic Medical Records lots of facilities such as hospitals, insurance companies and some other government sections, accumulate large amounts of electronic data. Generally, data analysis technologies used in health insurance claims data are statistical and data mining. To get some new information from the data, the social network analysis (SNA) is proposed as a new way...
Frequent itemsets which are quite useful in many applications always suffer from their huge number and information redundancy. Frequent closed itemsets that provide a minimal and lossless presentation of all frequent itemsets are a solution to the problem. In past years, frequent closed itemsets mining (FCIM) has been extensively studied and many effective FCIM algorithms have been proposed. CHARM...
We propose a new transmitter (TX) architecture for ultra-low power radios. An all-digital PLL employs a digitally controlled oscillator with switching current sources to reduce supply voltage and power without sacrificing its phase noise and startup margins. It also reduces 1/f noise allowing the ADPLL, after settling, to reduce its sampling rate or shut it off entirely during direct DCO data modulation...
An integration of 28 nm CMOS RF system with 3D solenoidal inductors (3DSI) in integrated fan-out (InFO) wafer level package technology is studied. The 3DSI provides the performance of Q-factor of 51 and isolation of −53 dB. With the 3DSI, the RF system in the InFO technology results in power saving by 58% and noise reduction by 80% in LNA and VCO, respectively, compared with those in RF SoC system...
The spacecraft which is composed by several modules should be tested on the ground whether the modules can be separated successfully or not, and separation locomotion data should be obtained as well. This paper has described the requirements and difficulties of separation test, and has designed the zero gravity platform. The critical design parameters are obtained by the analysis result of MSC.ADAMS...
The conventional PV systems based on the voltage inverters only inject dispatched power to the utility grid when they work at a grid-connected mode in the hydro-PV hybrid microgrid. Due to the droop method employed for load sharing between generators, as well as the enormous inertia of system. The existence of frequency steady-state error and the slow active power/frequency dynamic response are inevitable...
A novel dual-polarized dielectric resonator antenna fed by bowtie-shaped slots is investigated, which exhibits high isolation of greater than about 40dB with a broad bandwidth of wider than 26%. Its measured maximum gain is 6.65dB with a gain variation of 1.25dB over the bandwidth. Its good polarization purity and broadside radiation patterns are also confirmed.
A novel microstrip monopole antenna with a reconfigurable −10 dB impedance bandwidth is proposed in this paper for cognitive radios. The antenna is fed by a microstrip line integrated with a stub coupled multiple-mode-resonator (MMR) filter. The reconfiguration of the filter makes the circular disc monopole antenna operate at either a wideband state from 3.8 to 6.9 GHz or a narrowband state by using...
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