.~.~ Resonant, discrete frequency selective type

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333 / | HD | WAVE TRANSMISSION LINES AND NETWORKS |

24 R | DF | COUPLING NETWORKS {15} |

167 | DF | .~ Frequency domain filters utilizing only lumped parameters {10} |

175 | .~.~ Resonant, discrete frequency selective type {1} | |

176 | DF | .~.~.~> Including specific frequency rejection means |

Resonant, discrete frequency selective type:

(under subclass 167) Subject matter which include resonant series and/or parallel inductance and capacity networks which offer a low impedance path to energy of a particular frequency or of a plurality of separate discrete frequencies and/or offer a high impedance path to energy of a particular frequency or of a plurality of discrete frequencies.

(1) Note. This subclass includes filters under its definition in which means are incorporated for sharpening the tuning of the resonant circuits as by compensating for the resistance in such circuits.

(2) Note. The filters in this subclass are especially designed to pass only a single discrete frequency or a plurality of discrete frequencies but not a continuous band, or to eliminate one or more discrete frequencies from a band of frequencies.

197+, for similar filters utilizing electromechanical transducers.

330, Amplifiers,

76, for oscillators, combined with an output coupling network including a harmonic selecting filter.

334, Tuners, appropriate subclasses for tuners adapted to be used in wave energy apparatus, also see the reference note to Class 334 in the search notes of