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Unformatted text preview: Univ. of Ontario Institute of Technology Faculty of Engineering and Applied Science ' & Frequency Response • Frequency response is the ratio of the phasor of the output of a circuit (for example, voltage or current of a load) to the phasor of the source. • For example, in the following circuit the frequency response is written as H v ( jω ) = V L ( jω ) V s ( jω ) Electric Circuits (ENGR2790U) 193 of 310 Frequency Response ' & • Frequency response is defined for each frequency ω . • Given the frequency response H ( jω ) , one can find the output phasor for any input phasor. • In fact, one can write V L ( jω ) = H v ( jω ) V S ( jω ) • This means that  V L ( jω )  =  H v ( jω )  V S ( jω )  and ∠ V L ( jω ) = ∠ H v ( jω ) + ∠ V S ( jω ) Electric Circuits (ENGR2790U) 194 of 310 Frequency Response ' & • Example 6.1: Electric Circuits (ENGR2790U) 195 of 310 Frequency Response ' & • The input signal can be a current or a voltage source. • The output signal can be the load current or voltage. Electric Circuits (ENGR2790U) 196 of 310 Frequency Response ' & • Example 6.2: Electric Circuits (ENGR2790U) 197 of 310 Frequency Response ' & • What is frequency response good for?...
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 Spring '10
 dhavidhe
 Bandpass filter, Lowpass filter, Faculty of Engineering and Applied Science, Univ. of Ontario Institute of Technology

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