Knowledge Base Home
Welcome to the SIMetrix knowledge base. Here you will find answers to some common issue as well as general help with using SIMetrix
Waveform Viewer and Data Handling Issues
How to manage large amounts of simulation data
Handling Simulation Data - Part 2
How to improve data retrieval speed
Plotting Internal Device Parameters (PDF)
SIMetrix has a previously undocumented feature that allows you to plot things such as vdsat of a MOSFET or go of a BJT. This application note explains how
Export Graph Measurement Values
Two scripts that allow you to export all displayed measurement values to other applications via the clipboard
SIMetrix plots the plain amplitude for plots of Fourier spectra. This article describes how you can plot with dB axes
Exporting Graphics - Problem with Y-Axis Text
Read this article if you experience a problem exporting graphical images from the waveform viewer whereby the text for the Y-axis label is distorted
Model Library Issues
How to install models for discrete devices. Detailed instructions for all users
Installing models for discrete devices. Quick instructions for users familiar with SPICE models
Using Models from Process Foundries
How to use models supplied by process foundries for integrated circuit design
General Interest
How do the SPICE algorithms work?
Modelling
Pitfalls of Polynomials (PDF)
Technical note explains a problem that often arises when using polynomial expressions to fit non-linear transfer characteristics.
Parameter Dependent Tolerances - Matching MOS Devices (PDF)
This note explains how to implement Monte Carlo tolerances that are dependent on some device parameter. In particular it covers the length and width dependency of MOS device matching
Simulation
Clocked Flip-flop Problems (PDF)
An age old SPICE problem which causes clocked flip-flops to trigger incorrectly. This technical note explains the problem and a feature of SIMetrix that fixes it.
Script Applications
We have developed a suite of scripts to perform in-circuit curve tracing of MOSFETs and BJTs. The scripts and accompanying documentation can be found in this file