SPICE Model Synthesis Overview

Sonnet's EM solver provides a frequency domain solution in the form of S, Y, and Z-parameters. Many time domain simulators, such as some traditional SPICE engines, do not have the capability to import frequency domain data, or have problems with efficiency, stability, or accuracy when using frequency domain data.

To address these problems, Sonnet provides the capability to use your frequency domain data to synthesize a SPICE-compatible file. You may choose from several different models, depending on your needs. A brief description of each is provided below, and details for each model is provided by clicking on the link.

Pi Model: Appropriate for circuits that are electrically small (typically less than 1/20 of a wavelength) and can be represented by a simple pi topology.

N-Coupled Line Model: Appropriate for single or coupled transmission lines. Creates the RLGC parameters in a format compatible with the mtline component in Cadence Virtuoso Spectre or the W-element in Synopsis HSPICE.

Broadband SPICE Model: Appropriate for most circuits. Generates a lumped model based on a rational polynomial fit. Requires a Broadband SPICE Extractor license.

Inductor Model: Appropriate for spiral inductors. Generates a simple lumped element model which is specific to spiral inductors on a conductive dielectric. Requires a Broadband SPICE Extractor license.