Selectivity ratio and skirt selectivity

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agalya
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Whar is selectivity ratio and skirt selectivity??
what is the -30 dB point??
 

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agalya said:
Whar is selectivity ratio and skirt selectivity??
what is the -30 dB point??

What is the context of your question? Is this with respect to electronic filters, or some other application?
 

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