US PATENT SUBCLASS 327 / 119
.~.~ Frequency multiplication (e.g., harmonic generation, etc.)

Current as of: June, 1999
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327 /   HD   MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS

100  DF  SIGNAL CONVERTING, SHAPING, OR GENERATING {29}
113  DF  .~ Frequency or repetition rate conversion or control {3}
119.~.~ Frequency multiplication (e.g., harmonic generation, etc.) {3}
120  DF  .~.~.~> With plural outputs {1}
122  DF  .~.~.~> Doubling
123  DF  .~.~.~> With particular tube or distributed parameter element

DEFINITION

Classification: 327/119

Frequency multiplication (e.g., harmonic generation, etc.):

(under subclass 113) Subject matter wherein an input signal having a first frequency is transformed into an output signal having a second higher frequency, where the output frequency is a multiple of the input frequency.

(1) Note. A harmonic output frequency is an integral multiple of an input frequency.

(2) Note. Miscellaneous frequency mixing which produces sum or difference frequencies of two input frequencies is classified in subclass 113. Rectangular or pulse waveform frequency mixing is classified in subclass 114.

SEE OR SEARCH THIS CLASS, SUBCLASS:

113, for miscellaneous frequency mixing.

114, for pulse frequency mixing.

116, for frequency multiplication of an output rectangular or pulse waveform.

117, for miscellaneous frequency division. SEE OR SEARCH CLASS

84, Music,

600+, for apparatus for generating or modifying electric currents or potentials to produce varying electric currents or potentials in combination with or intended for use with structure for converting the varying electric currents or potentials into musical tones.

307, Electrical Transmission or Interconnection Systems,

105, for a class appropriate harmonic filter or neutralizer.

331, Oscillators,

76, for oscillators combined with electron space discharge tube harmonic generating or selecting.

363, Electric Power Conversion Systems,

157+, for frequency conversion systems of a single electrical source coupled to a single electrical load where there is no intermediate conversion to DC.