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A design of IIR digital filter based on DSP and SOPC technology was respectively conducted in this paper. Then design principles and implementation schemes were put forward, and the schematics of the hardware circuits as well as the software flow chart were given in detail. The experimental results indicate that the SOPC design has the advantages of flexible controls, continuous output phase, high...
A joint power system state and topology estimator based on a combined Weighted Least Squares (WLS) and Weighted Least Absolute Value (WLAV) strategy is proposed. The resulting coestimation algorithm is devised to simultaneously provide estimates to the analog power system variables and validate the current topology of the electric network. This is accomplished by formulating state & topology coestimation...
We have already proposed a simulation model for a 90-deg-tilted MEMS mirror, but in some reasons, numerical simulation methods for several angle counter electrode devices are not established. In order to solve these problems, we propose a cascade drive voltage signal technique and demonstrate a 51.5 deg tilted angle counter electrode and assure the effectiveness of the equivalence circuit.
A novel approach for modeling photonic crystal circuits is proposed. In this approach, the effective length of photonic crystal waveguide between two devices is estimated. The frequency response of the photonic crystal circuit is modeled as a Fabry-Perot cavity. An example of double 90-degree bend is analyzed by the approach. The results have great agreement with those obtained by finite-difference...
This paper presents a new type of a more complete system verification method, which combines a high-level verification methodology based on verification methodology manual (VMM) techniques for functional simulation and system-on-a-programmable-chip (SOPC) techniques for board-level verification, effectively improve the adequacy and reliability of verification and validation efficiency. This paper...
This paper proposes a structure of the joint frequency-phase carrier recovery loop for all-digital Quadrature Amplitude Modulation (QAM)receivers. The steady-state estimation variance is greatly reduced by introducing a non-zero-mean input to the Stop-and-Go controller. It has been verified by simulation tools that the circuit can acquire frequency offset up to 6% of the symbol rate and phase offset...
This paper proposes a two stage boost converter circuit for the grid connected photovoltaic system. Each stage is controlled separately by opposite pulse width modulated signal. Due to nonlinear I-V characteristic of the photovoltaic cells, the converter circuit is designed for the range of input voltage 35 to 60 V, 350 V output voltage and maximum output power of 525 watt. Dynamic modeling of the...
A FED driving circuit system with adjustable parameters, resources optimizing, voltage output with 420 V, giving support to 640×3×480 resolution is presented. In the circuit system, the following design methode was introduced: double buffer, internal dual-port distributed RAM, and low-voltage differential signaling (LVDS) interface.
The Integrated Learning Method (ILM) uses multiple learners to solve the same problem, which can greatly improve the generalization ability of learning systems. To address the fault diagnosis on analog circuits, aiming at the shortcomings of diagnosis and model stability with single RBF neural network to diagnose faults of analog circuit system, the paper discussed method to improve model diagnosis...
System dependability research is gradually making the transit of focusing on “fault time” to focusing on “fault process”. The researches on dependability models of micro failure mechanism and macro fault behavior have become hot topics. The system fault behavior model describes the occurrence and development process of system fault in term of the behavior, and also presents the effect of basic unit...
We investigate the performance of an uncoordinated 2 link MIMO interference channel as a function of the number of antennas and the average channel gains. The channel coefficients are random and uncorrelated, all links undergo Rayleigh fading, and the transmitters have no channel state information. The analysis is done in terms of ergodic capacity and outage probability. For non-asymptotic networks...
This article is a CMOS Start Up Circuit Designed which can supply the current flow (ISTART) adjustable to the clock generator for digital system generally. The circuit designed can be assigned start current value by giving the appropriate reference voltage. Current value is set to adjust in the range of 0-1.35 mA. The reference tune voltage is in the range of 0-5V to follow voltage value of microcontroller...
Solenoid valves are the basic element part that widely used in various industries. According to the performance requirements of the market, it is available in a wide range of shapes and size. In this paper, a large flow multi-stage solenoid valve has been designed and developed by configuring the orifice, diaphragm and solenoid. At first each part has modeled and by combining them a virtual multi-stage...
This article present the CMOS charge pump circuit which is operated in current mode. MOS transistors in this circuit act as the switches (charge transfer switch) and current source for store the charge from the supply voltage into the fly capacitor and transfer charge from the fly capacitor to the output (output capacitor and resistive load). All of the MOSFET which act as switch operated in saturation...
Partial shading has been identified as a major cause of reducing energy yield in a large solar photovoltaic array (SPVA). Partial shading may be due to due to tree leaves falling over it, birds or bird litters on the array, shade of a neighboring construction, passing clouds etc. Under partial shaded conditions the PV characteristics get more complex with multiple peaks. It is important to understand...
This paper presents virtual Power Electronics laboratory based new approach for power electronics education with special attention to drives. This approach is based on computer modeling and simulation. MATLAB/Simulink is used in this paper to illustrate the application of computer modeling and simulation in power electronics education. This approach is student centered. Therefore, there will be active...
The efficient modeling of unijunction transistor (UJT) is an burning issue in power industries. The available SPICE based model provides V-I characteristic of UJT. The output characteristic of UJT is nonlinear in nature and its modeling plays an important role in many applications where the output voltage of UJT drives any other device or circuit. In this paper a nonlinear device model is proposed...
Heterogeneous wireless sensor networks provide endless opportunities due to their extendable capabilities such as different computing power and sensing range, but at the same time pose formidable challenges, because of the fact that energy is a scarce and usually non-renewable resources. Deployment of sensor nodes in a sensor network is a critical task as deployment should be optimum to increase network...
This paper describes how a free circuit simulation software can assist in teaching the principles of power electronics to undergraduate students. The authors have used Solver for EQuations with User defined ELements (SEQUEL) as an aid to teaching basic power electronics course to undergraduate students at the authors' institute. Using SEQUEL as an aid in teaching-learning process has increased students'...
VLSI cell placement problem is known to be NP complete. A wide repertoire of heuristic algorithms exists in the literature for efficiently arranging the logic cells on a VLSI chip. The objective of this paper is to present a comprehensive solution of the cell placement technique, with emphasis on standard cell and macro cell placement using simulated annealing. The metropolis algorithm is applied...
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