253-7-freq-response-1 - EECE 253: Frequency Response Slide...

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Unformatted text preview: EECE 253: Frequency Response Slide 7.1.1 Frequency Response Transfer Function (Chap 14.2) Decibel Scale (Chap 14.3) Bode Plots (Chap 14.4) Series Resonance (Chap 14.5) Parallel Resonance (Chap 14.6) Passive Filters (Chap 14.7) Active Filters (Chap 14.8) EECE 253: Frequency Response Slide 7.1.2 A transfer function (TF) is a ratio of two s-domain signals, assuming the system is relaxed (i.e., all initial conditions are zero). Transfer Function (s domain) j s + = ) ( ) ( ) ( s X s Y s H = X(s) : input excitation Y(s) : output response Input and output can be current or voltage at any place in the circuit. Special case: j s = = then , EECE 253: Frequency Response Slide 7.1.3 Transfer Function (frequency domain) The transfer function H( ) of a circuit is the frequency-dependent ratio of a phasor output Y ( ) (an element voltage or current ) to a phasor input X ( ) (source voltage or current). = = | ) ( H | ) ( X ) ( Y ) ( H For sinusoid functions EECE 253: Frequency Response Slide 7.1.4 Transfer Function Four possible transfer functions: ) ( V ) ( V gain Voltage ) ( H i o = = ) ( I ) ( I gain Current ) ( H i o = = ) ( I ) ( V Impedance Transfer ) ( H i o = = ) ( V ) ( I Admittance Transfer ) ( H i o = = = = | ) ( H | ) ( X ) ( Y ) ( H EECE 253: Frequency Response Slide 7.1.5 What is Frequency Response of a Circuit?...
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This note was uploaded on 07/20/2009 for the course PHYS physics 10 taught by Professor Goatman during the Spring '08 term at The University of British Columbia.

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253-7-freq-response-1 - EECE 253: Frequency Response Slide...

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