Cosmos Scholars Publishing House: Journals Management System
Not a member yet
1952 research outputs found
Sort by
Numerical Simulation and Spice Modeling of Organic Thin FilmTransistors (OTFTs)
Full text linkAs organic thin film transistors are playing important role in low cost, large area and flexible integrated circuits, there is urgent need of accurate modeling and simulation of these devices with emphasis of compact modeling suitable in integrated circuit simulation using Spice like simulators. This paper presents a 2D numerical simulation of pentacene based organic thin film transistors. Also a spice model extraction methodology of OTFTs base on Silvaco's UOTFT model is presented for circuit simulation. The numerically simulated results are in good agreement with OTFT spice modeling results. The Organic TFT model is extracted from the numerically simulated data and further it is used in circuit simulation of CMOS like hybrid inverter and five stage ring oscillator circuit realized from hybrid inverter. In the hybrid inverter circuit an amorphous silicon TFT is used in place of the NMOS devices and a Pentacene based TFT is used in place of the PMOS devices. Circuit simulation results proves the applicability of the model in circuit design of organic thin film based transistors
Advance in the Analysis Models for Characterizing Multi-Layered Interdigital Capacitors
Full text linkThe performances of multi-layered interdigital capacitors are commonly simulated by computer software. However, it is the time-consuming process. Besides simulations, the analytic models with closed form expressions provide convenient methods in particular usages, such as characterizing ferroelectric materials. This article briefly reviews the development in the expressions for analytic models. We provide an overview of partial capacitance technique and conformal mapping technique, which are used for formulating expressions. In addition, three common models used these techniques are presented. The differences of models and applications are also discussed