4/9/2023 0 Comments Engauge digitizer chip![]() ![]() How to correlate the provided information in the datasheet to modeled behaviour.How each parameter influences the modeled behaviour.How Spice Models a specific component and the parameters available to you. ![]() I will only touch the surface, list a couple from the basic passive elements which aren't documented much and then provide links to further investigate how to model your component of interest as this is a HUGE subject, even for just a single element.įor creating your own models in SPICE for a specific component you will need to figure out the following: More-over, your question is too generic ,as others have commented already. Also, google for info on the models, you should find plenty - for instance, here is an excellent document on the Gummel-Poon model and how to use it.Īfter reading through these answers, clicking on a couple links, and more in depth links, a a whole rabbit hole of clicks, I have found quite a bit of info which I will skim over as an updated answer (and for my own documentational purposes )įirst of all : you should know that this is much more invloved than can be answered as an answer here. ![]() Also "A guide to Circuit Simulation using PSPICE" is a half decent book with some discussion of the model parameters. The help provides a lot of useful information, so read it thoroughly. It's helpful to look at the various models that come with LTSpice to get an idea of things. This can get very complicated very quickly, how complex depends on how accurate you need the component to simulate, and requires pretty detailed knowledge of the component type so you know which datasheet parameters are important, how they translate to SPICE parameters, etc.įor an example of the type of parameters you need to know about (at least some of them), in LTSpice help look under LTSpice->Circuit Elements->Bipolar Transistor and look at the Gummel-Poon parameters.Īs complex as this looks, you can use the defaults for most and just alter the basics like the Bf (Beta), Vje(b-e voltage), Cje (base emitter capacitance), Cjc, etc. MODEL card for basic elements (transistors, diodes) or for more complex components (ICs like Opamps, Regulators, etc) you can use either a sub-circuit model (made up of basic elements) or a behavioral model (using formulas to approximate behaviour) Depending on the component the common method is to use a. ![]()
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