Practical implementation of diode SPICE model with reverse recovery

<div>This paper presents a way to generate the correct SPICE sub- circuit using only parameters from the manufacturer's diode datasheet. Characterization tool software was created and tested and is now freely available to download and use.</div>

EXTRACTION STATIC PARAMETERS SPICE-MODEL OF LED ON THREE POINTS THE CURRENT-VOLTAGE CHARACTERISTIC

A simple method for extracting the static parameters of the SPICE-model of LEDs from three points of current-voltage characteristic proposes. Formulas for calculating the static parameters of the SPICE-model and measurement conditions are given.

DEVELOPMENT OF SPICE MODULE OF HV9931 CHIP FOR SIMULATION OF ELECTRONIC CIRCUITS

The process of development of the PWM SPICE model of the HV9931 controller and testing in a typical switching-on scheme is given.

KEY FACTORS AFFECTING THE DISCONNECTION OF EXPERIMENTAL AND MODEL CURVES IN MODELING P–N-TRANSITION ON PULSE BROADBAND SIGNALS

The article discusses the key factors influencing the discrepancy between the experimental and model curves when simulating a p – n junction on pulsed broadband signals. The reason for the discrepancy lies in the quasi-static representation of the forward and backward reconstruction of the p – n junction in the standard SPICE model. The quasi-static approximation does not take into account the transient processes in the p – n junction, which are associated with the transit time of minority charge carriers and the series resistance of losses.

General Modeling Method of Threshold-Type Multivalued Memristor and Its Application in Digital Logic Circuits

This paper presents a general modeling method for threshold-type multivalued memristors. Through this memristor modeling method, it is very simple to establish threshold-type memristor behavior models with different numbers of memristance elements, and these models are verified by numerical MATLAB simulations. A corresponding circuit-level SPICE model of the ternary memristor behavior model is developed and simulated in LTspice, shown to be consistent with the MATLAB results. Finally, the SPICE model is used to design the AND gate, OR gate, and three NOT gates of ternary state-based logic, and the effectiveness of the circuit is proved by LTSpice simulation.

Study of characteristics of n-p-n type bipolar power transistor in small-sized metalpolymeric package type SOT-89

In this study the input, output and current gain characteristics of silicon n-p-n type medium power bipolar junction transistors KT242A91 made by the "GRUPPA KREMNY EL" in modern small-sized metalpolymeric package type (SOT-89) have been obtained. The SPICE model that allows simulating realistic transistor behaviour of n-p-n type transistor KT242A91 has been proposed. It is shown that established experimental characteristics for KT242A91 transistor correspond to similar transistor’s type characteristics.

Design and Simulation of Electrochemical Equivalent Circuit for Extended-gate FET pH Sensor Based on Experimental Value Using LTSPICE XVII

A SPICE model for extended-gate field-effect transistor (EGFET) based pH sensor was developed using standard discrete components. Capacitors and resistors were used to represent the sensing and reference electrodes in the EGFET sensor system and the values of the discrete component were varied to see the output of the transistor. These variations were done to emulate the EGFET sensor output in different pH values. It was found that the experimental transfer and output characteristics of the EGFET were very similar to those from the SPICE simulation. Other than that, the changes of value components in the equivalent circuit did not affect the transfer and output characteristics graph, but the capacitor value produced significant output variation in the simulation. This can be related to the modification on the equivalent circuit was done with additional voltage, VSB (source to bulk) to produce the different VT values at different pH.

Impact of a Punching Process on the SyRM Iron Loss: SPICE Model as an Effective Tool for Iron Loss Modeling

Many technologies for cutting the magnetic laminations, from which electric motors cores are built, change material properties, among which are magnetizability and iron loss, thus affecting the motor parameters such as motor efficiency. This problem is particularly important for low-power motors, in which the dimensions of the magnetic circuit elements are relatively small. The correct estimation of the motor efficiency is important as early as at its design stage. This is possible when the correct material characteristics are used. This knowledge and analytical model enabling fast estimation of material properties (depending on the actual size) are necessary for engineers, who design electrical motors by analyzing many solution variants in a short time. The author proposes an analytical model of changing material properties, implemented in SPICE software. Its effectiveness was compared with measurement results while being a competitive solution in relation to other analytical models. The proposed SPICE model allowed evaluating material properties for lamination of any width. In the end, the knowledge concerning the material properties was used to calculate the iron loss in the stator of the SyRM motor, showing the need to use the material characteristics calculated for the specified width of the core piece.