Implementation of Linear and Nonlinear circuits using Operational Transconductance Amplifier

This paper describes implementation of CMOS based linear and non-linear analog circuits using operational trans conductance amplifier as the basic element. These circuits have their applications in communication and signal processing areas. In this work PSPICE is used for the simulation of various analog circuits. The corresponding results are presented.

Implementation of Linear and Nonlinear circuits using Operational Transconductance Amplifier

This paper describes implementation of CMOS based linear and non-linear analog circuitsusing operational trans conductance amplifier as the basic element. These circuits have their applications in communication and signal processing areas. In this work PSPICE is used for the simulation of various analog circuits. The corresponding results are presented.

Analysis of periodically switched nonlinear circuits and nonlinear oversampled sigma-delta modulators

This thesis proposes a new method for time domain response and sensitivity analysis of periodically switched nohnlinear circuits and nonlinear oversampled sigma-delta modulators. Using Volterra functional series and interpolating Fourier series, it extends the sampled datasimulation and two-step algorithm of linear circuits to periodically switched nonlinear circuits. The method can handle the inconsistent initial conditions encountered at switching instants. It is applied to the analysis of nonlinear oversampled sigma-delta modulators. The efficiency and accuracy of the proposed method are assessed using SPICE, brute-force, and the law of charge conservation on periodically switched nonlinear circuits, and nonlinear oversampled sigma-delta modulators. The method does not require the costly Newton-Raphson iterations. It is most efficient for analysis of circuits with mildly nonlinear characteristics and simulation over a long period of time.

Analysis of periodically switched nonlinear circuits and nonlinear oversampled sigma-delta modulators

This thesis proposes a new method for time domain response and sensitivity analysis of periodically switched nohnlinear circuits and nonlinear oversampled sigma-delta modulators. Using Volterra functional series and interpolating Fourier series, it extends the sampled datasimulation and two-step algorithm of linear circuits to periodically switched nonlinear circuits. The method can handle the inconsistent initial conditions encountered at switching instants. It is applied to the analysis of nonlinear oversampled sigma-delta modulators. The efficiency and accuracy of the proposed method are assessed using SPICE, brute-force, and the law of charge conservation on periodically switched nonlinear circuits, and nonlinear oversampled sigma-delta modulators. The method does not require the costly Newton-Raphson iterations. It is most efficient for analysis of circuits with mildly nonlinear characteristics and simulation over a long period of time.

Complex Dynamics and Hard Limiter Control of a Fractional-Order Buck-Boost System

Chaos and control analysis for the fractional-order nonlinear circuits is a recent hot topic. In this study, a fractional-order model is deduced from a Buck-Boost converter, and its discrete solution is obtained based on the Adomian decomposition method (ADM). Chaotic dynamic characteristics of the fractional-order system are investigated by the bifurcation diagram, 0-1 test, spectral entropy (SE) algorithm, and NIST test. Meanwhile, the control of the fractional-order Buck-Boost model is discussed through two different ways, namely, the intensity feedback and the hard limiter control. Specifically, the hard limiter control can be realized using a current limiter in the circuit, where the current limiter device is applied to control the branch current. The results show that the proposed fractional-order system has complex dynamic behaviors and potential application values in the engineering field.