The influence of evaporation conditions organic semiconductor material tris(8-hydroxyquinoline)aluminium (Alq3) on the performance light emitting diodes (OLEDs) is reported. In process thermal evaporation, chamber was dark or had white from a 100 W filament lamp. devices prepared in show higher emission intensity and efficiency compared with ones under same driving voltage. Atomic force microscopy measurements that surface morphology phase Alq3 thin films are quite different for previous...

An electrically bistable device has been fabricated using nanocomposite films consisting of silver nanoparticles and a semiconducting polymer by simple spin-coating method. The current-voltage characteristics the as-fabricated devices exhibit an obvious electrical bistability negative differential resistance effect. current ratio between high-conducting state low-conducting can reach more than 103 at room temperature. is attributed to electric-filed-induced charge transfer polymer, behavior...

A novel and simple piecewise curvature-corrected bandgap voltage reference (BGR) is proposed. It features in employing temperature-dependent resistor ratio to get a corrected current, which corrects the nonlinear temperature dependence of first-order BGR. The current generator forms negative feedback improve line regulation power supply rejection (PSR) proposed Simulation result shows coefficient (TC) 5ppm/K industry range (223–398K) PSR −82dB are achieved at 2.6-V voltage. simulated 0.6mV/V...

A low power 12bit 50KS/s R-C SAR (successive approximation) ADC is presented in this paper. DAC structure and modified sample-hold circuit are presented. For the digits distribution of DAC, mismatch analysis capacitors resistances emphasized because precision primarily depends on its DAC. Reasonable layout design can decrease mismatch. 12-bit resolution achieved 7-5 which operates with 1.8 V analog 1.8V digital power, realized 0.18 μm CMOS 1P6M technology. The draws only 0.54 mW has a...

To explore the applicability of Switched Reluctance Motor(SRM) used in robot joints as a servo motor, SRM control system was designed based on MATLAB. In this paper, MotorSolve to obtain simulation data discrete operation and cerebellar model articulation controller(CMAC) learn inductance-position angle-current torque-position nonlinear models, accuracy is higher than that ordinary look-up tables. The position realized by using cascade PID. result shows has fast response time 0. 35s under...

This paper presents a 56-Gbps four-level pulse amplitude modulation (PAM4) quarter-rate receiver based on rectification. Compared with the conventional three-comparator structure, PAM4 signal is converted into 2-digit gray-code rather than 3-digit thermometer-code. The detected to decode least significant bit (LSB), which allows proposed use significantly less power by reducing number of comparators. An inverter-based common-mode voltage stabilization circuit (CVSC) reduce effect level...

An area-efficient feedforward multi-bit sigma-delta modulator is designed in this paper. By adopting fourth-order 17-level quantization structure, the can achieve 20-bit resolution of 20kHz signal bandwidth with 64 oversample ratio. A novel full architecture employed modulator, which minimize every stage load to save chip area and power consumption by select relatively large coefficients without compromising stability. In addition, a 4-bit quantizer composed only 9 comparators. simple data...

In this paper, an ultra-wideband (UWB) data link for the micro air vehicles (MAVs) is proposed which can be used low probability of intercept and detection (LPI/D) transmission digital voice, high resolution video image. The achievable range-data rate performance reliable UWB long ranges evaluated compared, considering direct sequence spread spectrum (DSSS) modulation in low-data single carrier-based impulse radio system. Taking into account Doppler effect on wideband DSSS signal, a...

Traffic flow prediction is popular research of ITS.Traffic models based on machine learning have recently been widely applied.In this study, we use algorithms, heuristic and parallelization technology to propose a traffic model Relevance Vector Machine called Genetic Algorithm Particle Swarm Optimization spark optimized Combined kernel RVM (SPGAPSO-CKRVM).First, combined functions are constructed common functions.Second, parameter optimization algorithm proposed optimize the parameters by...

The resistance performance of 49.5m tuna longline fishing vessel is simulated by using CFD software, the simulation results are in good agreements with experimental results, which verified reliability numerical calculation.Then change bulbous bow three parameters relative extend length, depth and maximum width ratio build different models, their calculated method.Comparing analyzing calculation show that considering general arrangement, driving safety strength bow, add extends can reduce...

In this paper, a novel approach to interference mitigation with coexisting spectrum users for UWB pulse radio is proposed. This new uses adaptive frequency estimator give the estimating values of each users' center and band. Based on these values, band communication system can be adaptively divided into multibands. The shape sub-bands are also determined adaptively. method successfully solves coexistence problem between systems existing systems, especially stochastic users, without need...

An on-chip differential-amplifier-based voltage down converter (VDC) is proposed. Employing a reference generator, which operates in moderate inversion region, the architecture of proposed VDC simple and can be fabricated by conventional CMOS technology. converts 3.3V to lower so that internal circuits VLSI are used. In this paper, 1.8V used as an experiment vehicle. The output (V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">out</sub> )...

Simulations are used to characterize the single event transient current and voltage waveforms in common source amplifier with resistive load implemented using SMIC 0.18μm technology. The simulations all carried out circuit device-level mixed mode TCAD tools. Results show that amplitude of pulse is depending on input circuit. And when LET incidence particle higher enough do not obey classical double exponential model.

A 16-bit 5.6-MHz clock-rate digital to analog converter (DAC) achieves 96-dB signal-to-noise rate (SNR) in the 22-KHz band. The optimal canonic signed digit (OCSD) code is proposed a multi-stage interpolator filter achieve less hardware consumption. third-order cascade-of-resonators feed-forward (CRFF) with zero optimization Delta-Sigma modulator has been developed convert an oversampled signal into 1-bit code. switch-capacitor (SC) used reconstruct signal.

In this paper, a pipeline Time-to-Digital Converter (TDC) is presented. The TDC consists of clock circuit, pulse generator, three 2.5-bit/stage TDC, 3-bit delay-line and digital error correction the final output code 9-bit, time-register, sub-TDC, sub-DTC time amplifier. A register implemented to stores information, pulse-train amplifier adopted achieve accurate gain wide input liner range. designed in 0.18μm CMOS technology, area core circuit 415μm×217μm, simulation results show that...

An low-power and high-resolution delta-sigma modulator for audio application is presented in this paper. The applies single-loop six-order mixed feedforward single-bit quantizer topology. architecture can avoid the adder loop so as to save hardware decrease power dissipation. Fully differential switched-capacitor circuit applied implement modulator. OPAMP most important module of A novel gm-boost folded-cascade keep high DC gain acquire low-leakage linearity. achieves a SFDR 116dB signal...

This paper studies the influence of poly [2-methoxy-5-(2-ethylhexyloxy)-1, 4-phenylenevinylene] (MEH-PPV) on solution-processable functionalized graphene oxide (SPFGO) composite film-based organic light emitting Diode (OLED) and photovoltaic (OPV) performance for different SPFGO concentrations. There is a strong quenching photoluminescence when MEH-PPV doped with SPFGO, which means there transfer electron energy between SPFGO. Doping in can improve OLED at low concentration, will be best...

Influences of electric fields on the emission from organic light-emitting diodes (OLEDs) based poly (N-vinylcarbazole) (PVK); 2, 9-dimethyl-4, 7-diphenyl-1, 10-phenanthroline (BCP); and tris (8-hydroxyquinoline) aluminum (Alq3) were studied. There are three peaks at 420 nm, 520 620 nm device ITO/PEDOT: PSS/PVK/BCP/LiF/Al under different driving voltages. The emissions should be exciton PVK Alq3, respectively. last could attributed to electroplex interface between BCP layers. A high intensity...

Ultra-wideband technology is a promising candidate for short-range broadband communication systems. channels are characterized by dense multiple paths that provide multipath diversity, also referred to as frequency diversity. Single carrier systems with domain equalization have attracted much interest high data rate communications. In this paper, diversity in single ultra-wideband enhanced employing simple maximal ratio combining (FDMRC) reception time complex quadratic spreading (CQS)...