US PATENT SUBCLASS 332 / 117
FREQUENCY MODULATOR

Current as of: June, 1999
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332 /   HD   MODULATORS

117FREQUENCY MODULATOR {6}
118  DF  .~> Including measuring or indicating
119  DF  .~> Plural modulation {2}
123  DF  .~> Including stabilization or alternatively distortion, noise or other interference prevention, reduction, or compensation {3}
129  DF  .~> Including microwave or distributed parameter structure {2}
135  DF  .~> Including discrete semiconductor device {1}
137  DF  .~> Including electron discharge device {1}

DEFINITION

Classification: 332/117

FREQUENCY MODULATOR:

(under the class definition) Subject matter in which the frequency of the carrier is varied over a continuum of values in accordance with the modulating signal.

(1) Note. This subclass includes frequency modulators, per se. See the SEARCH CLASS notes below for combinations with the subject matter of this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

106+, for a pulse modulator.

144+, for a phase modulator.

149+, for an amplitude modulator.

SEE OR SEARCH CLASS

455, Telecommunications,

42+, for frequency modulation in a system with separated transmitter and receiver, and subclasses 110+ for a combination of frequency modulator with transmitting structure.