Electronics-I Lecture 33

Electronics-I Lecture 33 - Lecture 33 Electronics I 1...

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Unformatted text preview: Lecture 33 Electronics I 1 Common-Collector Amplifier Frequent application in design of small-signal, large-signal amplifiers & digital circuits Commonly known as emitter follower I/P signal applied at Base and O/P signal obtained at Emitter r o is included in analysis r o is in parallel with R L T-equivalent ckt. is more convenient Unlike CE and CB amplifiers, I/ P resistance depends on R L & O/P resistance depends on R sig Lecture 33 Electronics I 2 Common-Collector Amplifier Resistance reflection rule Reflecting emitter R to base side multiply by ( +1) The ratio of i e to i b Reflecting base R to emitter side divide by ( +1) Resistance (r o ||R L ) in series with emitter resistance r e Lecture 33 Electronics I 3 Common-Collector Amplifier Input Resistance at base R ib =( +1) [r e + (r o ||R L )] v o =v b (r o ||R L )/[r e + (r o ||R L )] Voltage Gain A...
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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 33 - Lecture 33 Electronics I 1...

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