When the output is taken from the L–C portion of an R–L–C circuit, the series resonant circuit
becomes a band-stop filter as shown in Figure 4.10.
Such a filter will reject the signals with frequen-
cies between the lower and upper cut-off frequencies
and will pass those signals with frequencies lower
than lower cut-off frequency and higher than higher
cut-off frequency. This type of filter is also known as
band-reject or band-elimination filter. The response
curve for a band-stop or stop-band filter is shown in
Figure 4.11.
It is seen that ...
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