Lec_31_ESC102N

Lec_31_ESC102N - 10/18/2010 Lecture 31 1 Oscillators wave...

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Unformatted text preview: 10/18/2010 Lecture 31 1 Oscillators wave Triangular wave Square wave Sine s Oscillator input external without wave periodic generate that Devices ,- 10/18/2010 Lecture 31 2 Oscillators - = = A A v v A Gain Feedback s o f 1 o v f v s v f s v v + A 10/18/2010 Lecture 31 3 Oscillators n Oscillatio o goes Circuit absent is v if Even A A For A A v v A s f s o f int , 1 1 = = - = = 10/18/2010 Lecture 31 4 Barkhausen Criterion frequency n oscillatio is which frequency certain at satisfied is criterion This Criterion Barkhausen called is or A A gain Loop ns Oscillatio sustained for Condition . 360 1 1 : = = 10/18/2010 Lecture 31 5 Phase Shift Oscillator o v F R 1 R R R R C C C network P Oscillates Circuit A P at shift Phase , 1 360 180 180 = = + = f v o v 10/18/2010 Lecture 31 6 Phase Shift Oscillator real be to has X R X j X R R R v v network of R R v v A A c c c o F F f o f f = - +- = = - = = = 2 3 2 3 3 1 180 ) 6 ( 5 , 1 10/18/2010...
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This note was uploaded on 12/08/2010 for the course EE ESC102 taught by Professor A.r.harish during the Spring '10 term at IIT Kanpur.

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Lec_31_ESC102N - 10/18/2010 Lecture 31 1 Oscillators wave...

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