Question
Download Solution PDFFor a series RLC circuit, selectivity is defined as the ratio of:
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe selectivity/sharpness of the resonance amplifier is measured by the quality factor and is explained in the figure shown below:
Selectivity of a resonant circuit is defined as the ratio of resonant frequency fr to the half power bandwidth.
Selectivity = resonance frequency/3-dB Bandwidth
\( = \frac{{{f_r}}}{{{f_2} - {f_1}}}\)
Important Points
The quality factor Q is defined as the ratio of the resonant frequency to the bandwidth, i.e.
\(Q=\frac{{ω}_{r}}{BW}\)
ωr = Resonant frequency
B.W. = Bandwith of the amplifier
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