E-Books →Electronic Circuit Simulator LTspice XVII Creating Symbols

Each semiconductor maker provides a free SPICE model for symbol creation, so even beginners can create their own symbols.
Basically, it is rare to create new symbols from scratch.
You can automatically create symbols from SPICE models provided by semiconductor manufacturers.
It is necessary to slightly change the pin arrangement according to the wiring of the schematic, but the detailed procedure will be explained here.
If you want to simulate using LTspiceXVII from now on, you could refer to this book.
This manual is No.3 "Symbol creation version" of the TOOL series for electronic circuit design using the latest version 17.
(No.1 "Basic operation / Circuit creation", No.2 "Simulation" has already been published, please refer)
Contents
CHAPTER 1　Library　configuration
1.1　Directory structure on the library
1.1.1　 cmp folder
1.1.2　 sub folder
1.1.3 sym folder
CHAPTER 2　What is SPICE model
2.1　SPICE model types
2.1.1　Device model
2.1.2　Sub-circuit model
2.2　SPICE model file format
2.2.1　Library file（＊.lib）
2.2.2 Symbol file（＊.asy）
2.2.3 Netlist file（＊.mod）
2.2.4 Text file（＊.txt）
2.2.5 Circuit file（＊.cir）
2.3　Supplier list of SPICE models
CHAPTER 3　Addition of New model
3.1　Addition of device models
3.1.1 Download the device model
3.1.2 Saving the device model
3.1.3　Confirmation of symbol model
3.1.4　Testing by simulation
3.2　 Addition of sub-circuit model
3.2.1 Download sub-circuit model
3.2.2 Creating mylib folder
3.2.3　Creating mysym folder
3.2.4　Creating symbol
3.2.5 Editing symbol attributes
3.2.6 Saving the symbol
3.2.7 Confirmation of symbol model
3.2.8 Testing by simulation
3.3　Addition of DC bias model
3.3.1 Download SPICE model
3.3.2 Symbol file (* .asy) stored location
3.3.3 Netlist file (* .mod) stored location
3.3.4 Directory path settings
3.3.5 Testing by simulation
3.4　Addition of operational amplifier
3.4.1 Download SPICE model
3.4.2 Saving to the mylib folder
3.4.3 Creating symbol
3.4.4 Editing symbol attributes
3.4.5 Saving the symbol
3.4.6 Confirmation of symbol model
3.4.7 Testing by simulation
CHAPTER 4　Creating new symbols
4.1　Automatic creation of symbols
4.1.1 Download SPICE model
4.1.2 Saving to the mylib folder
4.1.3 Automatic creation of symbols
4.1.3.1 Pin movement
4.1.4 Editing symbol attributes
4.1.5 Saving the symbol
4.1.6 Confirmation of symbol model
4.1.7 Testing by simulation
4.2　Manual creation of symbols
4.2.1 Creating symbol
4.2.2 Editing symbol attributes
4.2.3　Saving the symbol
4.2.4 Confirmation of symbol model
4.2.5 Testing by simulation
CHAPTER 5　Hierarchy
5.1　Hierarchy overview
5.2 Creating hierarchical circuit blocks
5.2.1　Saving the circuit blocks
5.2.2　Creating symbol
5.2.3　Saving the symbol
5.3　Top-level schematic
5.3.1　Saving the top-level schematic
5.3.2　Testing by simulation
5.4　Navigating the hierarchy