You can use any of the following methods to define parameters. This software and documentation contain confidential and proprietary information that is the property of synopsys, inc. Hspice basics an input netlist file must be created to begin the design entry and simulation process. The first commercial version of spice is ispice, an interactive version on a timeshare service, national css. In essence thats the same simulation you have described in your netlist only for each point in the sweep an operating point is calculated. In addition to simple arithmetic operations hspice also. Jan 10, 20 hspice simulatorthe basic analyses that can be carried out using hspice are. Data statement, and temperature sweep are selected, a parameter name must. Is there a wayworkaround to sweep duty cycle over time in ltspice. Understanding the dc sweep flow performing dc sweeps using other dc analysis statements. Popular alternatives to hspice for windows, mac, linux, software as a service saas, web and more. Is there any way of setting up a sweep of mosfet width and length. However, to view the graphical outputs, you will need to run an xserver e. I am trying to simulate the transfer characteristics of a cmos inverter using ltspice.
Meta, meta software, modelaccess, modeltools, nanosim, openvera, pathmill, photolynx, physical compiler. Dont worry if it takes a couple seconds for hspice to run, but as long as the command completes successfully youll know because it will say hspice job. Using parameters in simulation parameter definition. Leda, mast, meta, metasoftware, modeltools, nanosim, openvera. Hspice users manual and metawaves help and manual 7. See the hspice and avanwaves release notes for information about new features and lastminute changes. Spice simulated program with integrated circuit emphasis is a software package capable of modeling and simulating linear and digital circuits.
Hspice can be found on all the unix machines in sweet hall. A memory architecture in which memory cells are designed vertically instead of using a traditional floating gate. Inside this manual this manual contains the chapters described below. Dc sweep of dc operating points capacitances are ignored see p. Hspice command reference department of electrical and. Dc statement this chapter describes how to use the.
This page summarizes some useful information about digital circuit analysis with hspice. Data statement, and temperature sweep are selected, a parameter name must be chosen for the source value and subsequently referred to in the. Although there were many free and powerful spice variations, hspice became a standard of accurate circuit simulator. Hspice command reference electrical and computer engineering. Ac type np fstart fstop where np is the number of points and type can be either oct, dec or lin. Hbcontinuen specifies whether to use the sweep solution from the previous simulation. Hspice is one of spice variations commercialized by a company. To furthur help dc sweep analysis, you may increase itl2, the number of iterations hspice will take at each dc sweep point. If you want the current through a block defined by a subcircuit, then the current is defined as ix, followed by the parts designator, a colon, and the pin as defined.
The inputs can be the same for both pspice and hspice. Analysis and methods hspice version h92 meta software on. Brief introduction to hspice simulation wojciech giziewicz 1 introduction this document is based on one written by ihsan djomehri, spring 1999. Hspice tutorial university of california, berkeley. Chapter 7 performing transient analysis star hspice transient analysis computes the circuit solution as a function of time. Sep 26, 2001 while performing dc sweep, hspice now invokes the pseudotran analysis for difficult sweep points as well as dc bias calculation. Hspice tutorial university of california, san diego. You can just ignore these and they will automatically be overwritten with each run through the compiler.
Select analysis type to dc sweep and select the sweep variable as a global. Hspice stimulus types university of southern california. The softwar e and documentation are furnished under a license agreement and. Spice reads in a list of circuit nodes and the elements between. Hspice is an analog circuit simulator similar to berkeleys spice3 capable of performing transient. This manual describes the starhspice circuit and device simulation software. Hspice generally has better convergence than spice3 and, because it is a commercial product from metasoftware, is better supported. For descriptions of the other manuals in the hspice documentation set, see the next section, the. Optionally a second source src2 may be specified with associated sweep parameters. You will need to set up a dc sweep with a global parameter named rvariable for a linear sweep from 500u to 100ku in steps of 500u. However, hspice allows you to name nodes instead of numbering the nodes. Tran perform a transient analysis differential equation solver see p. Statistical analysis sweep monte analysis statements hspice only. Introduction spice simulation program with integrated circuit emphasis is a widelyused circuit simulation program.
File type file description suffix hspice input input netlist. Spice pioneers reveal history of 40yearold circuit. It also allows hierarchical node naming, circuit optimization, input, output, and behavioral algebraics for parameterized cells. Originally developed at berkeley in the late 60s and early 70s, spice has evolved into one of the tools of choice for circuit simulation. Hspice quick reference guide table of contents introduction 1 input and output files 2 behavior macromodeling 6 controlling input 18 analyzing data 41. With a userdefined optimization program and a known circuit topology, star hspice automatically selects the design components and model. Audience this manual is for analog, rf, and mixedsignal circuit designers and engineers who use hspice simulation for ic design and pcb signal integrity analysis. Hspice circuit simulation automatically looks for a file in the local directory named hspice.
By providing support on multiple platforms, offering support, and fixing problems in the source code, meta software established a successful business and sold 11,000 copies before the company was. I want to sweep the mosfet width and length and observe the effects on rise and fall times of the cmos inverter. The manual documents how to apply hspice rf capabilities for. These circuits can contain resistors, capacitors, inductors, transformers, independent sources, dependent sources, switches, transmission.
Spruiell, optimization error surfaces, metasoftware. Dc operating point, dc sweep, and polezero options. While performing dc sweep, hspice now invokes the pseudotran analysis for difficult sweep points as well as dc bias calculation. In this tutorial, you will practice the steps necessary to perform simulation using. Hspice probing current of an element defined by subckt. The advantage of using hspice on eniac is that you can run it from your room through a modem connection or over resnet. Note that acdc sweep and transientanalyses must be preceded by the command. Chapter 11 optimizing performance optimization, the automatic generation of model parameters and component values from a given set of electrical specifications or measured data, is available in star hspice.
Introduction 1 introduction this quick reference guide is a condensed version of the hspice simulation and analysis user guide, hspice applications manual, and hspice command. Dcoperating point, dc sweep, ac sweep bode plotting, transient,sensitivity and fourier analysis. This software and documentation contain confidential and proprietary information that is the property of. Known limitations and resolved des information about known problems and limitations, as well as about resolved synopsys techni cal action requests s tars, is available in the hspice and avanwaves release notes in solvnet. I can sweep the frequency in time by using modulate, but i couldnt find any example on creating a varying duty cycle or a duty cycle is swept from zero to 100% at a given frequency f in a time interval. The parameter opt presupposes the existence of previously calculated values, so that honestly i cant see how to dynamically set values to insert them in simulation as initial conditions without those being already known. Hspice is the industrys gold standard for accurate circuit simulation and offers foundrycertified mos device models with stateoftheart simulation and analysis algorithms. A good way to learn hspice and metawaves is to simulate example files provided by meta software.
Hspice is just a program that takes in a netlist a simple text. To illustrate this we will call the input node input and output node output. One of the first commercial spice simulators was hspice from meta software. The explanation assumes that the reader knows how to define circuits and components. This software and documentation contain confidential and proprietary information that is.
Hypermodel, i, inspecs, insync, leda, mast, meta, metasoftware, modelaccess, modelexpress, modeltools. With over 25 years of successful design tapeouts, hspice is the industrys most trusted and comprehensive circuit simulator. The piecewise linear mode the following figure, shows the graph generated in response to the pwl piecewise linear input stimulus applied between in and gnd. Hspice generally has better convergence than spice3 and, because it is a commercial product from meta software, is better supported. The most prominent commercial versions of spice include hspice originally commercialized by ashawna and kim hailey of meta software, but now owned by synopsys and pspice now owned by cadence design systems. Tanner tspice simulation fast, accurate, foundryproven simulation for demanding analogmixedsignal designs the tanner tspice simulator, part of the tanner tool suite, integrates easily with other design tools in the flow and is compatible with industryleading standards. The hspice default search order for the g file is as follows. Ac statement ac sweep and signal analysis 96 star hspice manual, release 1998. How to sweep a few variables at the same time in hspice.
This is the same example as the previous one but written for hspice. Tips for using hspice university of california, berkeley. Spicehspice use for usc students introduction and overview. You can also use the program remotely from home or the lab via telnet. Star hspice supports source value sweep, referring to the source name spice style. Explore 5 apps like hspice, all suggested and ranked by the alternativeto user community. It was developed as public domain software at the university of california and versions 2g6 vanilla spice and 3. Hspice is one of spice variations commercialized by a company meta software merged with avant.
They use hspice, but the instructor states other simulators should work also. Hspice stimulus types there are two types of stimulus that we widely use in this class 1. This document and the software described herein is only provided under a written. To understand it, let us assume that in the above example, we wish to know how the waveforms look if the impedance vale is varied between 40 ohms to 60 ohms in steps of 5 ohms. Hspice how to sweep a few variables and optimize at the same. Spice pioneers reveal history of 40yearold circuit simulator. In addition to simple arithmetic operations hspice also accepts the following from ece 529 at illinois institute of technology.
The software and documentation are furnished under a license agreement and. For a regular resistor model, to plot iv curve, i write. Hspice how to sweep a few variables and optimize at the same time. If this parameter is used many times in the code, we just need to change the value of the parameter only once and not at all places. Its simplest use is to assign a particular value at the beginning of hspice code. Hspice is one of spice variations commercialized by a company meta software from engineerin vlsi at islamic azad university. Hspice parameters parameters in hspice are names that can be assigned numeric values. Mast, meta, meta software, modelaccess, modelexpress, modeltools. Dc var startval stopval incr performs a dc sweep on the independent source or parameter var, varying its value from startval to stopval using the increment incr. Hspice is one of spice variations commercialized by a. Parameters in star hspice are names that have associated numeric values.
The explanation assumes that the reader knows how to. Leda, mast, meta, metasoftware, modeltools, nanosim, openvera, pathmill, photolynx, physical. There is no manual description about how to use hsplot because it is now unsupported software from avant but again it is more stable and simpler, so usually we dont need their support too much. Hi, in cadence you can sweep a few variables at the same time.
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