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PSPICE Tutorial. Introduction. SPICE ( S imulation P rogram for I ntegrated C ircuits E mphasis ) is a general purpose analog circuit simulator that is used to verify circuit designs and to predict the circuit behavior.

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introduction
Introduction
  • SPICE (Simulation Program for Integrated Circuits Emphasis) is a general purpose analog circuit simulator that is used to verify circuit designs and to predict the circuit behavior.
  • PSpice is a PC version of SPICE and HSpice is a version that runs on workstations and larger computers.
  • PSpice has analog and digital libraries of standard components (such as NAND, NOR, flip-flops, and other digital gates, op amps, etc) which makes it a useful tool for a wide range of analog and digital applications.
types of analysis
Types of Analysis
  • Non-linear DC analysis
  • Non-linear transient analysis
  • Linear AC Analysis
  • Noise analysis
  • Sensitivity analysis
  • Distortion analysis
  • Fourier analysis
  • Monte Carlo Analysis
circuit components available
Circuit Components available
  • Independent and dependent voltage and current sources
  • Resistors
  • Capacitors
  • Inductors
  • Mutual inductors
  • Transmission lines
  • Operational amplifiers
  • Switches
  • Diodes
  • Bipolar transistors
  • MOS transistors
  • JFET
  • MESFET
  • Digital gates
terminologies
Terminologies
  • Subcircuit:A subcircuit allows you to define a collection of elements as a subcircuit (e.g. an operational amplifier) and to insert this description into the overall circuit.
  • EDIF: Electronic Design Interchange Format, a standard published by EIA. Usually used for netlists.
file structure pspice capture
File structure PSPICE (Capture)
  • Input file for PSpice that has the file type “.CIR”
  • When a circuit is simulated “.OUT” is generated
  • “*.DAT” file is by default a binary file to see the data
  • “*.LIB” files where the details of complex parts are saved
  • Additional files
    • *.SCH (the schematic data, itself)
    • *.ALS (alias files)
    • *.NET (network connection files)
libraries
Libraries
  • These are files that contain reusable part data.
  • They can be custom or default ones
  • Some of the libraries available in the Evaluation version of PSPICE are:
        • abm.slb for special functions like square root and multipliers
        • analog.slb for analog components like resistors and capacitors
        • breakout.slb for pots
        • connect.slb, .plb for connectors
        • eval.slb, .plb for semiconductor, digital devices, switches
        • port.slb for grounds, high/low digital ports
        • special.slb for ammeters, viewpoints
        • source.slb for various analog and digital sources
parts
Parts
  • Part is a basic building block which may represent
    • One or more physical element
    • Function
    • Simulation model
    • When a part is placed for first time its entry is done in “Design Cache”

What is “Design Cache”????... Go and Find Out Yourself 

design structure
Design Structure
  • Flat Design
    • Small designs
    • All pages in same schematic
    • Off Page connectors are

used

    • Figure shows design

hierarchy

contd
Contd……
  • Hierarchical Design
    • Much complex designs
    • Symbols are created called

“Hierarchical Blocks”

things to remember before starting
Things to remember before starting
  • PSpice is not case sensitive
  • All element names must be unique
  • There must be a node designated "0" (Zero). This is the reference node against which all voltages are calculated.
  • If any change is made in circuit make sure you create netlist again before simulating it.
getting started
Getting Started
  • File  New  Project  Analog or Mixed A/D

Make sure to choose Analog or Mixed A/D and proper location for project

slide13
Next comes following window

Make sure you select “Create a blank project”

slide15
Now start placing components and connecting them (this part is quite similar to what you have done in last semester’s lab)

Add a library as per the requirement

for eg. here analog library has been

added

slide16
After completing the circuit save it and run it.
  • Plot appropriate waveform by probing on circuit.
design example
Design Example
  • Take example of a high pass filter (RC)
  • First we will follow initial steps of creating a new project
  • Now placing the components.
add probe
Add Probe

Probes

creating new simulation profile
Creating new simulation profile
  • Go to PSPICE  New Simulation Profile
  • Give a name to profile and create
ac analysis
AC Analysis
  • We can choose any of the analysis and options
  • Here AC analysis is done to see operation of filter
slide23
Run
  • Go to PSPICE  Run
  • Another waveform window will come up

See this window

to keep track of

current simulation