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LTSPICE

LTspice models for simple and complex components are all saved in the lib folder in your ltspice installation

or ..

another place

how to localize lib folder

Open ltspice

 

New Schematics (in File menu)

 

Add a simple component - press the symbol

 

You can now see the path to your ltspice library folder in the red circle

 

And I can see the following in my lib folder

 

Simple components like BJT , FETS, resistors etc are all described in folder lib/cmp - cmp short for components

In lib/cmp you will find

  • standard.bead binary propritary comp file

  • standard.bjt BJTs

  • standard.cap Capacitors

  • standard.dio Diodes

  • standard.ind Inductors binary propritary comp file

  • standard.jft JFET

  • standard.mos MOSFET

  • standard.res Resistors

you can find my files just below

Src folder list: here

Simple component example: BC549B

In lib/cmp/standard.bjt

.MODEL BC549B NPN(IS=4.679E-14 ISE=2.642f ISC=2.337E-14 XTI=3 BF=458.7 BR=11.57 IKF=0.1371 IKR=0.1144 XTB=1.5
VAF=52.64 VAR=364.5 VJE=0.5591 VJC=0.1994 RE=0.2598 RC=1 RB=1 RBM=1 IRB=1E-06 CJE=1.229E-11 CJC=4.42p XCJC=0.6193
FC=0.7936 NF=1.01 NR=1.019 NE=1.581 NC=1.164 MJE=0.3385 MJC=0.2782 TF=4.689E-10 TR=1m2 ITF=0.8842 VTF=2.828
XTF=160 EG=1.11 VCEO=30 ICRATING=100m MFG=PHILIPS)

Adding a new simple component : bjt,jfet,mos.

  1. Find a component model alike the above

  2. Add it to the proper component file

    1. standard.bjt for a BJT transistor

    2. standard.jft for a JFET transisitor

    3. etc

For component files

Src folder list: here

TL072 - an example

found on ltspice comp libs wiki

BJTs etc

LTSPICE

Some small comments for ltspice.

Getting new components - quick and dirty

  1. Go to ltwiki fopr additional components

  2. Find your new component (and files)

  3. Follow instruction for the component for install

  4. Copy <xxx>.sub to ltspice folder lib sub

  5. Copy <xxx>.asy to ltspice folder lib sub

TL072 - an example

found on ltspice comp libs wiki

BJTs etc

Look here

from https://twiki.org


File:TL072.sub TL072 subcircuit. Place in \lib\sub
File:TL072.asy TL072 component. Place in \lib\sym\Opamps
File:Pweoverdrivepreamp2.asc Overdrive Preamp circuit, using native TL072
Datasheet Original files adapted from [2].

  1. TL072.sub

  2. TL072.asy

  • Testet on my own ltspice

  • Some of the components has slight different ways of install so read the wiki carefully

Jens