1-30 below the resonant frequency point. The two points are designated upper frequency cutoff (f_{co}) and lower frequency cutoff (f_{co}) or simply f_{1} and f_{2}. The range of frequencies between these two points comprises the bandwidth. Views (A) and (B) of figure 1-12 illustrate the bandwidths for low- and high-Q resonant circuits. The bandwidth may be determined by use of the following formulas: For example, by applying the formula we can determine the bandwidth for the curve shown in figure 1-12, view (A). If the Q of the circuit represented by the curve in figure 1-12, view (B), is 45.5, what would be the bandwidth? If Q equals 7.95 for the low-Q circuit as in view (A) of figure 1-12, we can check our original calculation of the bandwidth.

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