EEL102 Introduction to SPICE. Spice – Introduction Spice is a short form of : Simulated Program with Integrated Circuit Emphasis Used for circuit analysis.

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Presentation transcript:

EEL102 Introduction to SPICE

Spice – Introduction Spice is a short form of : Simulated Program with Integrated Circuit Emphasis Used for circuit analysis Many varieties of SPICE – WINSPICE, PSPICE, HSPICE….

Download instructions Student

INSTRUCTIONS for running

Steps before running the simulation… Draw the circuit and Label all nodes and elements Circuit described in terms of its elements and properties

Syntax rules Not case-sensitive First line of code is ALWAYS the TITLE and ignored.End -> Last Line of code Comment within a line should be followed by ; Comment lines start with *

Circuit elements Resistor:  R  Rx k Capacitor:  C  C u Inductor:  L  Lxy 4 5 1m

Voltage and current sources 3 types : DC, AC, Transient Voltage Sources:  V [[DC] ] [[AC] ] [transient + specs] Current Sources:  I [[DC] ] [[AC] [phase]] [transient + specs] DC source:  V  V1 3 0 DC 6 AC source:  V1 3 0 AC

Transient Sources Pulse  V PULSE(V1 V2 Td Tr Tf Tw Period)  V1: Value when pulse is not on  V2: Value when pulse is fully on  Td: Time delay ; can be zero  Tr : Rise Time; Zero causes some simulation problems  Tf : Fall time  Tw : Pulse Width  Period Total time in seconds of pulse  Ex: Vs 1 0 PULSE(0V 10V 0s 100ms 100ms 900ms 2s) Sin : Damped Sine  V SIN(V0 Va fr Td Df theta)  V0: DC Offset value  Va: Undamped amplitude. Peak measured from zero if no DC offset  fr: frequency in Hz  Td: time delay in seconds  Df :Damping factor  Theta: Phase advance in degrees  Ex: Vs 1 0 SIN(2V 5V 2Hz 200ms 2Hz 30d)

Dependant Sources Ebar ; VCVS  E Glab ; VCCS  G Hvx Vhx 50.0 ; CCVS  H Ftrn Vctl 50.0 ; CCCS  F

Analysis DC Analysis: .DC [src2 start2 stop2 incr2] .DC Vds Vgs AC Analysis: .AC  Sweep is either LIN, OCT, DEC .AC DEC 20 1Hz 10kHz .AC LIN ; Transient Analysis .Tran .TRAN 1n 1000n

OUTPUT Text Output: .PRINT Graph Output: .PROBE command generates a.dat file

Example Firstorder lowpass Rcfilter Vin 1 0 AC 1.0V Rf Cf uF.AC DEC Hz 100kHz.PROBE.END

References ial.pdf ial.pdf _files/PSpice-Tutorial.pdf _files/PSpice-Tutorial.pdf