US PATENT SUBCLASS 455 / 260
.~.~.~.~.~.~ Phase lock loop or frequency synthesizer

Current as of: June, 1999
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455 /   HD   TELECOMMUNICATIONS

130  DF  RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24}
230  DF  .~ Local control of receiver operation {7}
255  DF  .~.~ Local oscillator frequency control {2}
257  DF  .~.~.~ Automatic {2}
258  DF  .~.~.~.~ Utilizing particular local oscillator control {4}
259  DF  .~.~.~.~.~ Reference oscillator or source {1}
260.~.~.~.~.~.~ Phase lock loop or frequency synthesizer

DEFINITION

Classification: 455/260

Phase lock loop or frequency synthesizer:

(under subclass 259) Subject matter having either a closed-loop electronic servomechanism the output of which locks onto or tracks the reference signal or a frequency source of high accuracy whose output frequency, is composed of two components.