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Q and Bandwidth of a Resonant Circuit

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The Q, quality factor, of a resonant circuit is a measure of the "goodness" or quality of a resonant circuit. A higher value for this figure of merit correspondes to a more narrow bandwith, which is desirable in many applications. More formally, Q is the ration of power stored to power dissipated in the circuit reactance and resistance, respectively:

Code:
       Q = P[SUB]stored[/SUB]/P[SUB]dissipated[/SUB] = I[SUP]2[/SUP]X/I[SUP]2[/SUP]R
       Q = X/R
       where:      X...
Q and Bandwidth of a Resonant Circuit

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