Package ngspice

A mixed level/signal circuit simulator

http://ngspice.sourceforge.net

Ngspice is a general-purpose circuit simulator program.
It implements three classes of analysis:
- Nonlinear DC analyses
- Nonlinear Transient analyses
- Linear AC analyses

Ngspice implements the usual circuits elements, like resistors, capacitors,
inductors (single or mutual), transmission lines and a growing number of
semiconductor devices like diodes, bipolar transistors, mosfets (both bulk
and SOI), mesfets, jfet and HFET. Ngspice implements the EKV model but it
cannot be distributed with the package since its license does not allow to
redistribute EKV source code.

Ngspice integrates Xspice, a mixed-mode simulator built upon spice3c1 (and
then some tweak is necessary merge it with spice3f5). Xspice provides a
codemodel interface and an event-driven simulation algorithm. Users can
develop their own models for devices using the codemodel interface.

It can be used for VLSI simulations as well.
General Commands
Command Description
cmpp Code Model PreProcessor
ngmakeidx Changes .txt files to .idx
ngmultidec make ngpice sub-circuit for coupled transmission lines
ngnutmeg ngspice post-processor
ngproc2mod program to process BSIM1 and BSIM2 files.
ngsconvert convert spice formats
ngspice circuit simulator derived from SPICE3f5