US PATENT SUBCLASS 332 / 100
FREQUENCY SHIFT KEYING MODULATOR OR MINIMUM SHIFT KEYING MODULATOR

Current as of: June, 1999
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332 /   HD   MODULATORS

100FREQUENCY SHIFT KEYING MODULATOR OR MINIMUM SHIFT KEYING MODULATOR {2}
101  DF  .~> Including logic element (e.g., logic gate or flip-flop)
102  DF  .~> Including discrete semiconductor device

DEFINITION

Classification: 332/100

FREQUENCY SHIFT KEYING MODULATOR OR MINIMUM SHIFT KEYING MODULATOR:

(under the class definition) Subject matter in which the frequency of the carrier is shifted among a plurality of discrete values in accordance with the modulating signal.

(1) Note. This subclass and its indents provide for a minimum shift keying (MSK) modulator which is a frequency shift keying modulator having phase continuity at the frequency transition points.

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

SEE OR SEARCH THIS CLASS, SUBCLASS:

103+, for a phase shift keying modulator.

SEE OR SEARCH CLASS

375, Pulse or Digital Communications,

272+, for a frequency shift keying system (i.e., transmitter and receiver), and subclasses 303+ for a frequency shift keying modulator combined with transmitting structure.