US PATENT SUBCLASS 359 / 190
.~.~ Homodyne


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

109  DF  OPTICAL COMMUNICATION {13}
189  DF  .~ Receiver {5}
190.~.~ Homodyne


DEFINITION

Classification: 359/190

Homodyne:

(under subclass 189) Subject matter wherein a locally generated voltage at the received carrier frequency will result in a zero beat reception for detection of the

transmitted information signal.

(1) Note. This is also called a zero-beat demodulator.

(2) Note. Any further processing of the output of the demodulator will use electrical signals since the intermediate frequency (IF) output is outside the frequency spectrum of optical signals.

(3) Note. An electrical or optical local oscillator used in combination with a homodyne optical receiver is classified in this subclass.