Transcription of Frequency Response and Bode Plots
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Frequency Response and Bode Plots
1 Bob York 2009 1 Frequency Response and Bode Plots Preliminaries The steady-state sinusoidal Frequency - Response of a circuit is described by the phasor transfer function ()Hj . A Bode plot is a graph of the magnitude (in dB) or phase of the transfer function versus Frequency . Of course we can easily program the transfer function into a computer to make such Plots , and for very complicated transfer functions this may be our only recourse. But in many cases the key features of the plot can be quickly sketched by hand using some simple rules that identify the impact of the poles and zeroes in shaping the Frequency Response . The advantage of this approach is the insight it provides on how the circuit elements influence the Frequency Response .
1 If the source and load impedances are not the same this shows up as an additive constant in (1.10), not especially critical for the discussion of this chapter. 4 …
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