EE 230 Lecture 32 Spring 2010

EE 230 Lecture 32 Spring 2010 - EE 230 Lecture 32 Small...

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EE 230 Lecture 32 Small Signal Operation of Nonlinear Networks
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Which region of operation of the BJT corresponds to the Saturation region of the MOSFET? Quiz 32
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And the number is ? 1 3 8 4 6 7 5 2 9 ?
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Which region of operation of the BJT corresponds to the Saturation region of the MOSFET? Quiz 32 BJT V CE I C Forward Active Cutoff Saturation MOSFET
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MOS Transistor Applications (Digital Circuits) DD Y A B M 2 M 1 M 4 M 3 DD X Y M 1 M 2 Termed CMOS Logic Widely used in industry today (millions of transistors in many ICs using this logic Almost never used as discrete devices Review from Last Time:
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Bipolar Transistor B: Base C: Collector E: Emitter Review from Last Time:
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Bipolar Transistor npn pnp p-type silicon n-type silicon Review from Last Time:
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Bipolar Transistor I C V CE I B1 I B2 I B3 I B4 I B5 npn Review from Last Time:
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Bipolar and MOS Region Comparisons BJT V CE I C Forward Active Cutoff Saturation MOSFET Triode Cutoff Saturation Forward Active Cutoff Saturation Review from Last Time:
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Simplifier Basic Multi-Region Model CB I β I = t BE V V E S B e β A J I = q kT V t = V BE =0.7V V CE =0.2V I C =I B =0 Forward Active Saturation Cutoff V BE >0.4V V BC <0 I C < β I B V BE <0 V BC <0 Bipolar Transistor Review from Last Time:
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Methods of Analysis of Nonlinear Circuits Will consider three different analysis requirements and techniques for some particularly common classes of nonlinear circuits 1. Circuits with continuously differential devices Interested in obtaining transfer characteristics of these circuits or outputs for given input signals 2. Circuits with piecewise continuous devices interested in obtaining transfer characteristics of these circuits or outputs for a given input signals 3. Circuits with small-signal inputs that vary around some operating point Interested in obtaining relationship between small-signal inputs and the corresponding small-signal outputs. Will assume these circuits operate linearly in some suitably small region around the operating point Other types of nonlinearities may exist and other types of analysis may be required but we will not attempt to categorize these scenarios in this course
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Circuits with small-signal inputs that vary around some operating point This is one of the most useful classes of circuits that exist Use is driven by goal to use nonlinear devices ( at fundamental device level, that’s all we have that provide power gain) to perform linear signal processing functions Concept of “systems” with small-signal inputs that vary around some operating point throughout the electrical engineering field and in many other fields as well Although the concepts will be introduced in the context of electronic circuits, the principles and mathematics are generally applied
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Small-signal Operation of Nonlinear Circuits • Small-signal principles • Example Circuit • Small-Signal Models • Small-Signal Analysis of Nonlinear Circuits
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Small-signal Operation of Nonlinear Circuits • Small-signal principles • Example Circuit • Small-Signal Models • Small-Signal Analysis of Nonlinear Circuits
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EE 230 Lecture 32 Spring 2010 - EE 230 Lecture 32 Small...

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