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Reading a Datasheet for our DC Transistor model parameters.

The model for the active region

We have created the form of our DC model for our transistor in the last post, “The Basic DC Model for a NPN Transistor“. However, there are lots of unknown values that we need to determine to build a model for the actual transistor we are going to

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The Basic DC model for an NPN Bipolar Junction Transistor

Modified Current Definitions for our NPN Transistor Model Discussion

There are two ways to create a model. One method is to know how the pieces are parts inside the device operate and use these principles to add all the pieces and parts and their interactions together to develop a “white box” model. The opposite

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Circuit simulation software – Qucs

A Simple model in Qucs

I spent a fairly large about of time trying to find some simulation software to meet the needs of this blog and the readers of this blog. Some of the criteria I used in the search were:

Free or very low cost: Most of us do not have hundreds

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Thevenin and Norton equivalent sources.

Thevenin equivalent source.

Now that we have talked a little about ideal sources it is time to get real. Yeah, I really do mean that. We are going to talk a little about real sources and modelling those. The first one I am going to talk about is the Thevenin model shown in the

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Linearity and our pencil and paper models for Electronics.

Independent Sources

Our goal now is to come up with a way to create simple models of electronic circuits. From the discussion last time “Design, Models, and Simulations“, we understand our model will be very simplified and therefore inaccurate. However, it will be good enough for our first shot before going to the trouble

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Design, Models, and Simulations

Design, if you are lucky, is based upon some calculations developed from a model of the thing you are attempting to design and construct. Often, as we have seen with the sheet metal brake project you are not lucky and we are left “flying by the seat of our pants.” Other times we know the

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