Electronics-I Lecture 30

Electronics-I Lecture 30 - Lecture 30 Electronics I 1...

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Unformatted text preview: Lecture 30 Electronics I 1 Direct Analysis Equivalent-circuit model implicitly used Lecture 30 Electronics I 2 Model & Early effect Collector current is dependent v CE A resistance r o is connected between the CE terminals r o V A /I C for I C = 0.1 mA r o = 1 M In common-emitter configuration r o is in parallel with R C Gain decreases slightly v o = - g m v be (R C ||r o ) r o neglected if r o > 10R C In common-base configuration Inclusion of r o complicates analysis Lecture 30 Electronics I 3 Basic Single-Stage BJT Amplifier Configurations Common-Emitter (CE) configuration Common-Base (CB) configuration Common-Collector (CC) configuration Lecture 30 Electronics I 4 Basic Structure I I C = ( 29 1 / I I B + = C CC C IR V V - = ( 29 1 / IR V B B + - = ( 29 ( 29 BE B E V 1 / IR V + + - = Lecture 30...
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This note was uploaded on 12/12/2010 for the course EE 1 taught by Professor Shahidanwar during the Spring '10 term at NUCES.

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Electronics-I Lecture 30 - Lecture 30 Electronics I 1...

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