At this point you should be comfortable running hspice and awaves under your current environment windows or unix. This measurement is only applied to hspice ac and aplac ac analysis. For example, if the magnitude of the input voltage is 1v, then a voltage magnitude measurement in db is the voltage. Cadence pspice technology offers more than 33,000 models covering various types of devices that are included in the pspice software. Ac voltage source vac source dc current souce idc source ac current source iac source. Dc initialization and point analysis performing initialization and analysis star hspice manual, release 1998. Electronic circuit optimization this project is dedicated to the optimization of any electrical and electronic circuits and compon. A new window pop up with the pspice project type, select create a blank project and. This element facilitates the adjustment of propagation. For this type of analysis we will cover how to add an ac signal source to your schematic and choose a specific diode. Dctran value the dc offset of the voltage source ac acmag the ac magnitude and phase applied in an ac analysis. Independent source elements using sources and stimuli 52 star hspice manual, release 1998.
The delay element is the same as a current controlled current source except it is associated by a propagation delay td. Whether youre a student or professional, spice will allow you to predict the behavior of your electronic circuits accurately. This tutorial introduces the dependent source elements in pspice. So far we have covered circuits with resistors and independent sources. Ac analysis spice automatically does a dc analysis before doing a transient or ac. Using pspice for circuits with dependent sources the problems in this tutorial and the corresponding homework continue to deal with the dc analysis of circuits, or dc bias analysis in pspice. Cccs is a star hspice keyword and should not be used as a node name. Now, we can begin describing the mechanics of writing a netlist. Other versions of hspice should not differ too much.
Lets sim the transfer function and verify it has been designed accordingly. At the start of the tutorial a brief introduction of ac alternating current is provided after that a simple ac circuit is implemented in pspice and the results were analyzed precisely. Ac indicates the source is to be used in ac small signal analysis. Hspice is one of spice variations commercialized by a company meta software merged with avant. The original circuit had a sinusoidal input 9 cos 2t. To allow us to set the transconductance factor of the source to the noise density in favhz, we need a resistor with a noise density of 1 fvvhz, which means that the resistor shall have the very small value of 60.
Ac statement, you must specify an ac source in your circuit. Dc sweep and ac sweep are two powerful simulation methods to add to your spice workflow. Brief introduction to hspice simulation wojciech giziewicz 1 introduction. Then the current of this voltage source can be probed. Similarly we want the input impedance to be high as to not draw current from the source. Data statement, and temperature sweep are selected, a parameter name must be chosen for the source value and subsequently referred to in the. I dont find the usage of isub my hspice version is 2001.
Must begin with an i followed by up to 15 alphanumeric characters. Install the following components from the cd that comes with the textbook. Writing simple spice netlists introduction spice is used extensively in education and research to simulate analog circuits. Back to search page click to download printable version of this guide. Hspice tutorial university of california, berkeley. The simulationready sinusoidal voltage source component vsin can be found in the simulation sources integrated library \library\simulation\simulation sources.
Hspice tutorial university of california, san diego. Ngspice users manual version 31 describes ngspice release version holger vogt, marcel hendrix, paolo nenzi september 22nd, 2019. A current source provides a fixed value of current to the circuit. The explanation assumes that the reader knows how to. If the measurement component specifies just an element, the current is through the element. If the measurement component specifies a node, then the current measured is the current entering this node. Simulation using winspice get started with community west. Abs output is absolute value if abs1 cccs keyword for current controlled current source. However, its current flows into the first node, through the source, and then out of the second node. Ac statement ac sweep and signal analysis 96 star hspice manual, release 1998. With ac sweep, you can calculate the smallsignal response of a circuit. However, hspice does not give the dc voltages unless you have specified a certain analysis type, such as for instance.
The dc analysis statement defines a dc voltage or current range to an existing independent ac or dc source srcname. Ac type np fstart fstop where np is the number of points and type can be either oct, dec or lin. For detailed information, see voltage and current controlled elements in the hspice simulation and analysis user guide. Ese 216 pspice with orcad capture penn engineering. Spice quick reference sheet the general anatomy of a.
This page summarizes some useful information about digital circuit analysis with hspice. The basics of spice and how its integrated into autodesk eagle. Select download center hspice version number release notes. Hspice is just a program that takes in a netlist a simple text. Hspice basics an input netlist file must be created to begin the design entry and simulation process. Hspice commands introduction files source file devices. Consider the sinusoidal voltage source in the above image, with the following characteristics. How to plot snm for srams and power consumption with temperature duration.
An ac circuit is the one in which the source of the circuit is of alternating current rather than dc direct current. Voltage and current controlled elements hspice supports the following voltage and current controlled elements. For ac voltage and current measurements, selecting the db check box calculates 20log10 measurement. Although there were many free and powerful spice variations, hspice became a standard of accurate circuit simulator. Circuit elements and models university of california. Data statements basic components resistors capacitors and inductors voltage and current sources independent dc sources independent ac sources transient sources sinusoidal sources piecewise linear source pwl pulse. Acmag is the ac magnitude and acphase is the ac phase. Hspice simulation and analysis user guide version x2005. Hspice tutorial ac simulation we will construct and analyze a nmos common source amplifier as the example for ac analysis.
Passive devices diodes jfet and mesfet devices bjt devices inside this manual this manual contains the chapters described below. Option post command and contain the data to graphed by hsplot, awaves, or hspice. Simulation with hspice university of texas at dallas. Ac analysis is supported by aplac and hspice simulators, so select aplac ac noise or hspice ac noise from simulators. Getting started with hspice 4 digital circuit simulation using hspice for the mos transistors in this file. Sample deck showing how to compute ac gain and input resistance. E elements voltage controlled voltage source vcvs linear polynomial piecewise linear. Positive current is assumed to flow from the positive node, through the source, to the negative node. Similarly, to create a white current noise source, we can use a voltage dependent current source g source. Hspice licensing information listing of the circuit results form the analysis of the circuit. Figure 1 shows the pspice schematic for a circuit that was analyzed in class. A circuit is described by a file known as circuit file and must be specified in terms of element names, element values, nodes, variable parameters, sources, and the commands for what to calculate and what to provide as output. In this tutorial, we will again use the hspice on engineering workstation linux computers.
A more complete representation of the input source. Ac nsteps fstart fstop here fstart and fstop are the start and stop frequencies, respectively, and nsteps is the of number of intervals. The current value is returned as the complex magnitude. Chapter 5 using sources and stimuli class home pages. Hspice simulation and analysis user guide department of.
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