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-- name: #329
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Question #329

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4G-4.4 What is an "m-derived filter"?

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A filter whose input impedance varies widely over the design bandwidth

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A filter whose product of the series- and shunt-element impedances is a constant for all frequencies

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A filter whose schematic shape is the letter "M"

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A filter that uses a trap to attenuate undesired frequencies too near cutoff for a constant-k filter