3-47F4 D
What is an m-derived filter?
A. A filter whose input impedance varies widely over the design bandwidth.
B. A filter whose product of the series- and shunt-element impedances is a constant for all frequencies.
C. A filter whose schematic shape is the letter "M".
D. A filter that uses a trap to attenuate undesired frequencies too near cutoff for a constant-k filter.
