PSPICE Program Research Articles

Pspice simulation of tonpilz transducer with different metal material loaded on both ends

Tonpilz transducers have been widely used in underwater acoustical application as elements of sonar array. Tonpilz transducers are fabricated, by bolting different metal on both end of segmented piezoelectric ceramic, to satisfy multiple, conflicting design specifications. The aim of this paper is to study the characteristics of Tonpilz transducer that depend on different metal loading. First, the Mason equivalent circuit is used to model the segmented piezoelectric ceramic, then, the impedance network of tail and head masses are deduced by the Newton's theory. To obtain the optimal solution to a specific design formulation, PSPICE programming techniques can be applied. An example of the application of PSPICE programming in Tonpilz transducer analysis is presented and the simulation results are in good agreement with the experimental measurements.

A study of the electrical properties of permselective membranes with symmetric, reversible interfacial processes using the network method

Abstract The electrical properties of a membrane containing a single salt M + X − , with the cation being the only permeable species and the anion the blocked species at the interfaces, are analysed using the network method. The steady-state electrical properties of the system and the small-amplitude ac response of the biased system with a simultaneous dc steady-state electric current have been obtained by simulation with the PSPICE program of a previously obtained network model for a thin-layer electrochemical cell. The results obtained confirm the validity of the network approach to deal with diffusion-migration impedances of electrochemical systems with symmetric, reversible interfacial processes when a dc electric current is superimposed. Some advantages of the present approach over more classical ones are discussed.

Simulation and analysis of negative differential resistance devices and circuits by load-line method and PSpice

The three-peak current–voltage ( I– V) characteristics can be obtained from the combination of two special series-connected resonant tunneling diodes (RTDs) under certain conditions. We will discuss and derive these constraint conditions in this paper. For lack of the RTD model in PSpice program, a large-signal model was proposed for simulating the I– V characteristics of the RTDs in PSpice. The simulated I– V characteristics are matched well with the measured and analyzed results. In applications, a four-valued memory circuit based on the three-peak I– V characteristics is demonstrated and simulated.

Static and Dynamic Characterization of P-N Junction Solar Cells

This work presents an accurate, fast and automated technique for characterizing p-n junction single crystal solar cells. A PC-based system was constructed to measure the static conditions — current-voltage characteristics, and dynamic characteristics — capacitance-voltage characteristics in the reverse bias region and impedance-frequency-voltage characteristics in the forward region.Different techniques were used to extract the model parameters as well as the most important physical and technological parameters. The five parameters single diode lumped model was used to fit the measured I-V data under AMI illumination. The extracted parameters of the lumped model were used as an input for the PSPICE program to simulate the solar cell characteristic.Both measurement and extraction of parameters were carried out on-line under the direct control of a personal computer. The developed system exhibits reliable performance and its use can be extended for characterizing other semiconductor devices.

Analysis and Simulation of Stacked-Segment Electromechanical Transducers with Partial Electrical Excitation by PSPICE

A composite transducer is fabricated, by stacking certain segments of poled piezoelectric ceramic, to satisfy multiple, conflicting design specifications. An electromechanical equivalent circuit that substantially facilitates the analysis of segmented systems, based on the Mason model is derived. To obtain the optimal solution to a specific design formulation, PSPICE programming techniques can be applied. An example of the application of PSPICE programming in the segmented transducer analysis is presented and the simulation results are in good agreement with the experimental measurements.

Dynamic models of 3-phase alternators including saliency effects using PSpice for Windows

This paper presents the dynamic model of a 3-phase synchronous machine using the graphical user interface provided by the PSpice program environment. The machine model includes the effects of the damper winding and salient poles. The paper presents results of the dynamic behavior of a salient pole synchronous machine including voltage, current, torque, and power traces. The model is organized in a hierarchical structure and includes custom symbols for the machine several functional modules like reference frame transformation modules. The custom symbols have been created within the Schematics editor of the PSpice program group. Details of the implementation as well as the theoretical equations are presented. The model that is shown in this paper is working on the free evaluation version of the PSpice software, Release 6.2a.

Simulation and interpretation of electrochemical impedances using the network method

The small-signal impedance response of electrochemical cells in which the ionic transport obeys the Nernst-Planck and Poisson equations is interpreted by means of the network method. The method is general and extremely efficient; it permits treatment of multi-ion systems and imposition of conditions on both the electric potential and the electric current density through the cell. The network model of some representative electrochemical cells, including non-faradaic processes and interfacial kinetics described by a Butler-Volmer type equation, has been obtained, and the electrochemical impedance of these systems has been simulated with the aid of the PSPICE program.

High speed driving of a gain-switched laser diode with an exponential transmission line

With the increase of information capacity of an airborne system, high speed driving of laser diodes have been of interest. In order to match the low resistive LD, proposed in this paper is an exponential transmission line, which is used as preshaping to compensate the pattern effect in gain switching of laser diodes. It also will be used to overcome the effect of parasitic elements in high speed driving to improve the rise and trail edges of the output waveform. An accurate circuit model of the exponential line for the PSPICE program has been developed and simulations are conveniently carried out by employing PSPICE.

An improved PSPICE model for simulation and analysis of thyristor commutation circuits in DC choppers

An accurate model of the thyristor in DC chopper commutation circuits is described using the available elements in the PSpice program library. The improved model, which takes into account the reverse recovery time during turn off, is used to simulate voltage and current commutated DC choppers. Simulation results, which include a study of commutation failure, agree with theoretical and experimental results. The model developed is useful for computer aided analysis and design of DC thyristor choppers including the commutation circuits.

Pspice analysis of HFf high-power amplifier and comparison to related methods

Application of the PSpice program for analyzing HF high-power tuned amplifier (HFHPTA)is described in this paper. The new method is compared to other known methods. Calculation results of the balance of power and coefficient of efficiency, as well as the errors referred to catalogue vales are given for different methods of analysis.