Subsircuit analisys, converting subcircuit netlist to schematic

Imagine, you are lucky to get subcircuit for component you’d like to simulate. How good this subcircuit is? Quality of simulation strongly depends on quality of subcircuit model that is used. Unfortunately, netlist for complicated subcircuit does not look like schematic drawing and is hard to interpret. Yes, everything is there, but as many design […]

Hierarchical Blocks in LTSPICE

LTSPICE is offering very nice possibility to incorporate repeatable portions of schematic into simulation, that is not available in many other SPICE simulation programs- hierarchical blocks. Hierarchical blocks represent reusable portions of schematic, visible on higher level of schematic as a symbol. While LTSPICE is missing multipage schematic editor, hierarchical blocks are offering another simple way […]

Schematic Integration of Subcircuit into LTSPICE

LTSPICE is offering very simple and straight forward way to create a symbol and  connect it to subcircuit definition. Every subcircuit that you want to use should have corresponding schematic symbol. Symbol is a drawing, used to represent a device, described by a subcircuit or a hierarchical block. You may use existing symbol if it’s pinout and […]

Subcircuits in LTSPICE

Your simulation is as good as quality of the models you are using! At least it is no better than that. This is the reason why I would like to dig into LTSPICE Subcircuit topic and create a simple reference. I’m using it myself and hope it will save you some time also. Though, there […]

Subcircuit structure

Header Netlist Comments Device Models Major LTSPICE components, elementary devices Major LTSPICE components, semiconductor devices Major LTSPICE components, voltage and current sources Major LTSPICE components, Special Functions Expressions and functions in LTSPICE subcurcuits End

Filter design software from Texas Instruments

TI recently updated their FilterPro™ MFB and Sallen-Key Filter Design software. It is not complete filter design suit and includes only limited amount of physical realizations of second order stages. In fact FilterPro™ is supporting only Multiple Feedback and Sallen-Key realizations of active stages. However, it is doing well what it supposed to do.