Lecture6B - EEE 5320 Bipolar Analog IC Design Analysis of...

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EEE 5320 Bipolar Analog IC Design Lecture 6 Analysis of Biasing Circuits In previous lectures, we’ve considered what biasing is, why it is important, and what some of the key issues are in bias design. Now let’s consider how to find the operating point of a circuit, given its schematic. We’ll probably need some simplified models for the transistors as well. Analyzing a circuit to find its operating point is usually harder than designing a circuit to have a desired operating point. When you design a circuit, you already know what you want it do, and it’s just a matter of setting things up so this happens. When you start an analysis, especially of an unknown circuit, you generally don’t know what it’s supposed to do, and finding out what it does can be like solving a puzzle. Often it’s tricky to know how to start; after that, it usually gets easier. Following are some tips on how to get started; you’ll need to practice solving some circuits to get better at it. In the process of learning to analyze these puzzling circuits, you should get insights that make you better at designing bias circiuts. We’ll also see how a circuit simulation programs tries to find operating points – computers find this difficult, too. Biasing Circuit Analyis: Getting Started
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This note was uploaded on 01/17/2011 for the course EEE 5320 taught by Professor Dr.robertfox during the Fall '10 term at University of Florida.

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Lecture6B - EEE 5320 Bipolar Analog IC Design Analysis of...

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