HSPICE – Highlights and Introductions Techniques for SI 09-17-03 12/4/2002 Features Use for SI 2 ? Parameters ? Alters ? Libraries ? Syntax based – NO GUI ? Self documenting ASCII node names ? Voltage Controlled Resistor ? Monte Carlo ? Node equation based source ? PWL linear based source ? Nodal measurement produce measurement files ? Accurate Transmission lines with W elements ? Frequency dependant transmission lines Transient ? IBIS buffers HSPICE for SI 12/4/2002 Good Practices 3 ?Modularize with sub-circuits and/or libraries! ?Circuit text should flow line a drawing. Don’t put all caps, resistors, and transmission lines respective separate sections. ?Most SI circuits are composed of data generator, buffers, transmission lines, package models, and connectors. HSPICE for SI 12/4/2002 4 Global, Local, and Position ? Circuit elements within a sub-circuit or the main net list are position insensitive. Good-news/bad news It is easier to follow elements whose code traces out the circuit. ? Insub-circuit.general parameters are global unless passed into a ? Parameters are not positions insensitive Treat definition of parameters as last reference wins the definition. This can be trick to determine for complex decks. Deck is old terminology that comes form “punch card decks” ? Make the first 8 characters of library names unique ? Most HSPICE is case insensitive. The exception is libraries and file names that are enclosed in single quotes HSPICE for SI 12/4/2002 5 Top Level Program ? Firstdiagram.step is to draw as simulation block ? Themethodfollow