US PATENT SUBCLASS 359 / 183
.~.~.~ Phase modulation

Current as of: June, 1999
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359 /   HD   OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS

109  DF  OPTICAL COMMUNICATION {13}
180  DF  .~ Transmitter {3}
181  DF  .~.~ With particular modulation {3}
183.~.~.~ Phase modulation

DEFINITION

Classification: 359/183

Phase modulation:

(under subclass 181) Subject matter wherein the instantaneous amplitude of the information signal (i.e., modulating signal) modulates a sine-wave carrier so that its instantaneous angle (i.e., phase) deviates from the original (no-signal) angle by an amount proportional to the information signal amplitude.

SEE OR SEARCH THIS CLASS, SUBCLASS:

182, for an optical transmitter using frequency or frequency and phase modulation.