Ansys, Inc.

Shan Wan

Norman H Chang

Deqi Zhu

Yi Cao

Systems and methods are provided herein for estimating an output current of an input/output (I/O) driver given a set of voltages present at pins of the I/O driver. A set of voltages are received comprising voltages present at a power pin, a ground pin, at least three input pins, and at least three output pins of an I/O driver. Neural network models are applied to one or more voltages of the set of voltages to determine currents associated the I/O driver. A state space model is applied to one or more voltages of the set of voltages to determine another current of the I/O driver. An output current of the I/O driver is estimated based on the currents and the one or more values.

C-PHY input/output driver modeling using artificial neural network and state space models

Computer-implemented systems and methods are provided for modeling a charge pump. A relationship between an output voltage of the charge pump and a loading condition is determined. A frequency-domain analysis is performed at multiple frequencies to determine an impedance function representative of the charge pump's impedance at each of the multiple frequencies. A vector-fitting algorithm is applied to approximate the impedance function using a plurality of poles and residues. A circuit is synthesized based on the plurality of poles and residues. A model for the charge pump is generated, where the model includes the synthesized circuit and components that model the relationship between the output voltage and the loading condition.

Low-dropout regulator and charge pump modeling using frequency-domain fitting methods

Computer-implemented systems and methods for modeling low-dropout (LDO) regulators and charge pumps are provided. A relationship between an output voltage of an LDO regulator or charge pump and a loading condition is determined. A frequency-domain analysis is performed at multiple frequencies to determine an impedance function representative of an impedance of the LDO regulator or charge pump at each of the multiple frequencies. A vector-fitting algorithm is applied to approximate the impedance function using a plurality of poles and residues. A circuit is synthesized based on the plurality of poles and residues. A model for the LDO regulator or charge pump is generated, where the model includes the synthesized circuit and components that model the relationship between the output voltage and the loading condition.

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Saratoga, CA, United States of America

Shan Wan