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'Constant-k' FilterConstant-k filters are sometimes used by themselves, and sometimes as a basis for the design of the other types. In the constant-k filter, Z1 and Z2 are inverse elements; that is, if Z1 of Fig, 24 consists of inductance, then Z2 must consist of capacitance. That is,
where k is a constant independent of frequency. Because of the fact that the other filters are derived from it, the constant-k filter is known as a "prototype."
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Last Update: 2011-05-30