Watts J. – TechConnect Briefs

A Fully Automated Method to Create Monte-Carlo MOSFET Model Libraries for Statistical Circuit Simulations

Wang J., Trombley H., Watts J., Randall M., Wachnik R., IBM Semiconductor Research and Development Center, US

As the MOSFET continues to shrink, device-to-device variations become increasingly important. Therefore, it is critical to develop accurate, Monte-Carlo (MC) models that capture various device variations to allow statistical circuit simulations. To model the global [...]

Elements of Statistical SPICE Models

Lu N., Watts J., Springer S.K., IBM, US

We discuss several elements of statistical SPICE models and present our solutions. We present (i) a solution of automatically detecting Monte Carlo vs. skewed simulations, (ii) a method of modeling an arbitrarily given asymmetric or [...]

Effective Width Modeling for Body-Contacted Devices in Silicon-On-Insulator Technology

Khandelwal S., Tamilmani E., Shanbhag K., Watts J., IBM SRDC Bangalore, IN

Body-Contacted (BC) devices are extensively used in silicon-on-insulator analog circuits to avoid kink effect. This effect is not desirable as it changes gain of device suddenly. But to make body-contact special layout schemes are used. [...]

Simulating CMOS Circuits Containing Multiple FET Types Including the Geometric Dependence of Correlation between FET Types

Park J-E, Park S-J, Liang C-H, Assenmacher J., Watts J., Park J-E, Park S-J, Wachnik R., IBM, US

MOSFET device of similar design but different threshold voltage are often built on a single chip. It is important to be able to simulate with a compact model the variation of such devices including the [...]

SPICE Modeling of Multiple Correlated Electrical Effects of Dopant Fluctuations

Lee Y.M., Watts J., Grundon S., Cook D., Howard J., IBM Semiconductor Research and Developement Center, US

We proposed a new methodology capable of accurately modeling the partial correlations and geometric dependency in the local random fluctuations of various electrical parameters. This method incorporates principal factor analysis (PFA) into the conventional SPICE-based [...]

Authors: Watts J.

A Fully Automated Method to Create Monte-Carlo MOSFET Model Libraries for Statistical Circuit Simulations

Elements of Statistical SPICE Models

Effective Width Modeling for Body-Contacted Devices in Silicon-On-Insulator Technology

Simulating CMOS Circuits Containing Multiple FET Types Including the Geometric Dependence of Correlation between FET Types

SPICE Modeling of Multiple Correlated Electrical Effects of Dopant Fluctuations

Modeling FET Variation Within a Chip as a Function of Circuit Design and Layout Choices

Advanced Compact Models for MOSFETs

A Compact Model Methodology for Device Design Uncertainty

How to Build an SOI MOSFET Compact Model without Violating the Laws of Physics

Extraction of Compact Model Parameters for ULSI MOSFETs Using a Genetic Algorithm