The core of the model is the current-voltage relationship. It must accurately predict the drain current ($I_ds$) for all regions of operation: linear, saturation, and sub-threshold.
This article explores the fundamentals of SPICE, the physics behind device models, and the evolution of modeling techniques that enable the design of today’s nanometer-scale integrated circuits.
Designers reference these model names within their netlists to run DC, AC, and transient simulations. Tell me if you want to look into: A using a specific model card semiconductor device modeling with spice
Models must account for aging effects like Bias Temperature Instability (BTI). 💻 Implementing Models in SPICE
This is the standard approach used in circuit design. Compact models are sets of analytical equations derived from semiconductor physics. They are computationally efficient, allowing simulators to analyze circuits containing millions of transistors in a reasonable timeframe. The core of the model is the current-voltage relationship
Detailed mathematical equations for
use mathematical curve-fitting to match measured data. Designers reference these model names within their netlists
derive equations from carrier transport mechanics.
Industry standard for deep sub-micron planar bulk CMOS.
Device modeling translates complex semiconductor physics into mathematical equations. SPICE simulators use these equations to calculate node voltages and branch currents.
Extraction software runs optimization loops. Algorithms minimize the error between measured data curves and SPICE simulated outputs. ⚡ Advanced Modeling Challenges