PSpice models downloading

Many semiconductor manufacturers have data sheets and PSpice models available online for easy access by engineers. In this section we will show how to obtain those models so that we can use them in a simulation. The types of models we will show can be split into two types. The first type of models are primitives that use only a. model statement. Examples of these are diodes, bipolar junction transistors (BJT), and MOSFETs. The second type of models we will download are subcircuit models such as op-amps, IGBT s, Darlington transistors, and MOSFET subcircuit models. 

The parts contained in the Digikey database and the parts you can download from Activeparts do not have PSpice models, although this feature may be added in the future. Thus, the projects we create can only be used for documentation purposes or for PC board layouts. No simulations can be performed on a circuit we create from these parts. Here, we will only show how to add these parts and create bills of materials. 

The parts available in the database and the parts that can be downloaded from the Activeparts web site do not contain PSpice models, so we cannot use these parts to run a simulation. When you create a project, you should select either the Schematic or PC Board Wizard option. Run Capture CIS and then select File, New, and then Project to create a new project ... 

PSpice did not have a similar zener diode in its library, so a 1N4728 zener diode model was downloaded from an unnamed Web site. You could also use a voltage source set at 3.3 V in place of the zener. This would assume that the zener is used at its test current, IZT, which biases the PSpice results however, if asked to build this circuit by using only the models that were contained in PSpice, this would be a natural assumption to make. 

---

See also in sourсe #XX -- [ ]

---