1.2.1 Command Overview

The most important Analog Insydes commands are listed in this section. For each command, references are given where to find more information. A link to the reference manual (Part 3 of this book) is given first, followed by links to related topics described in the tutorial (Part 2 of this book).

Interfaces

Analog Insydes provides import and export filters to PSpice, Eldo, and Saber (Chapter 3.10):

ReadNetlist (Section 3.10.1, Section 2.9.2) translates external netlist files (including model cards, small-signal data, and operating-point information) into the Analog Insydes netlist language.

ReadSimulationData (Section 3.10.3, Section 2.10.2) allows for importing and transforming numerical simulation data into Mathematica InterpolatingFunction objects.

WriteSimulationData (Section 3.10.4) exports numerical data calculated with Analog Insydes for further postprocessing in external waveform viewers.

WriteModel (Section 3.10.5) generates behavioral model descriptions of symbolic (approximated) equation systems.

Netlists, Circuits, and Models

In Analog Insydes, analog circuits are expressed in terms of Netlist, Circuit, and Model objects:

Netlist (Section 3.1.1, Chapter 2.2) is the basic data structure which contains the elements of a flat netlist.

Circuit (Section 3.1.2, Chapter 2.3, Section 2.3.1) is a data structure which combines netlists, models, model parameters, and global parameters.

Model (Section 3.2.1, Section 2.3.2, Section 2.6.2) is a data structure which defines netlist-based or equations-based models or subcircuits.

AddElements (Section 3.6.1, Section 2.9.4), DeleteElements (Section 3.6.2, Section 2.9.4), GetElements (Section 3.6.3), and RenameNodes (Section 3.6.4) allow for adding, deleting, or extracting netlist entries and changing node names, respectively, in a comfortable way.

Statistics (Section 3.6.17) prints information on the contents of a Netlist or Circuit object.

Analog Insydes provides a predefined symbolic device model library (Chapter 4.3), which can be extended by the user. Several commands allow for accessing the model data base (Chapter 3.3):

LoadModel (Section 3.3.6) loads a specific model from a given model library.

FindModel (Section 3.3.2) searches the default model library for a given name/selector pair.

GlobalSubcircuits (Section 3.3.4, Section 2.3.6) prints the name/selector pairs of all global models currently loaded.

ListLibrary (Section 3.3.1) prints the contents of a specific model library.

Equations

Starting from Circuit or Netlist objects, circuit equations can be set up automatically in different formulations and analysis modes. They are stored (together with additional information) in a DAEObject.

CircuitEquations (Section 3.5.1, Chapter 2.4, Section 2.4.2, Section 2.6.4) sets up circuit equations from a Circuit or Netlist object and returns a DAEObject.

Solve (Section 3.5.4, Section 2.4.2) can be used to symbolically solve the equations stored in a DAEObject.

GetEquations (Section 3.6.5, Section 2.10.2), GetVariables (Section 3.6.7, Section 2.10.2), GetDesignPoint (Section 3.6.12, Section 2.9.6), and GetParameters (Section 3.6.9, Section 2.10.2) give easy access to the data stored in a DAEObject.

ApplyDesignPoint (Section 3.6.13), UpdateDesignPoint (Section 3.6.14, Section 2.10.2), and MatchSymbols (Section 3.6.15, Section 2.9.3) allow for modifying the contents of a DAEObject.

GetDAEOptions (Section 3.6.10) and SetDAEOptions (Section 3.6.11) allow for accessing or modifying the options stored in a DAEObject.

Statistics (Section 3.6.17, Section 2.9.7) prints information on the complexity of a DAEObject.

Numerical Analyses

The standard numerical circuit analyses can be carried out by the following commands (Chapter 3.7):

NDAESolve (Section 3.7.5, Chapter 2.7) is used to solve nonlinear differential-algebraic equation systems. It calculates the DC (Section 2.6.6), DC-transfer (Section 2.7.2), and transient solution (Section 2.7.1), also parametric (Section 2.7.2).

ACAnalysis (Section 3.7.3, Section 2.9.7) computes the small-signal solution of a linear equation system.

NoiseAnalysis (Section 3.7.4) computes the output noise and the equivalent input noise of a linear equation system.

Poles and Zeros

Besides the standard numerical analyses, Analog Insydes provides functions for numerically computing poles and zeros as well as root loci of linear systems (Chapter 3.8):

PolesAndZerosByQZ (Section 3.8.3), PolesByQZ (Section 3.8.4), and ZerosByQZ (Section 3.8.5) numerically compute poles and zeros of a linear system using the QZ algorithm.

RootLocusByQZ (Section 3.8.6) computes the root locus of a linear system.

Graphical Postprocessing

Analog Insydes provides special graphics functions for the most important electrical engineering plots:

BodePlot (Section 3.9.1, Section 2.5.1)

FourierPlot (Section 3.9.2)

NicholPlot (Section 3.9.3, Section 2.5.3)

NyquistPlot (Section 3.9.4, Section 2.5.2)

RootLocusPlot (Section 3.9.5, Section 2.5.4)

TransientPlot (Section 3.9.6, Section 2.7.1, Section 2.7.6)

Symbolic Approximation

One of the most important features of Analog Insydes is its capability to reduce the complexity of symbolic equations and expressions with automatic error control. For linear circuits, Analog Insydes provides SBG and SAG methods (Chapter 2.8):

ApproximateTransferFunction (Section 3.11.2, Chapter 2.8, Section 2.8.2) approximates a symbolic transfer function by removing insignificant terms.

ApproximateMatrixEquation (Section 3.11.3, Chapter 2.8, Section 2.8.3) approximates a symbolic matrix equation with respect to a certain output variable.

ApproximateDeterminant (Section 3.8.8) approximates a symbolic matrix equation with respect to a certain pole.

As of Analog Insydes Version 2 there are also simplification routines for nonlinear equations (Chapter 3.12):

CompressNonlinearEquations (Section 3.12.2, Section 2.10.2) algebraically simplifies nonlinear equations by eliminating irrelevant variables.

CancelTerms (Section 3.12.3, Section 2.10.2) approximates a symbolic nonlinear equation system with respect to a certain output variable. The command NonlinearSetup (Section 3.12.1, Section 2.10.2) prepares the application of CancelTerms.

Miscellaneous

DXFGraphics (Section 3.13.2) translates DXF files into Mathematica graphics objects. It can be used to display circuit schematics in a Mathematica notebook for documentation purposes.

Options[Analog Insydes] (Chapter 3.14) returns the list of global Analog Insydes options. See Section 3.14.8 for a description of the option inheritance mechanism in Analog Insydes.

Info[AnalogInsydes] (Section 3.15.6) prints the exact location of your Analog Insydes installation and lists all loaded init files. For a description of init file loading see Section 3.15.1. For further information on the Analog Insydes environment see Chapter 3.15.