US PATENT SUBCLASS 329 / 307
.~.~ Including phase or frequency locked loop

Current as of: June, 1999
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329 /   HD   DEMODULATORS

304  DF  PHASE SHIFT KEYING OR QUADRATURE AMPLITUDE DEMODULATOR {3}
306  DF  .~ Input signal combined with local oscillator or carrier frequency signal {1}
307.~.~ Including phase or frequency locked loop {1}
308  DF  .~.~.~> With parallel signal combiners (e.g., Costas loop) {1}

DEFINITION

Classification: 329/307

Including phase or frequency locked loop:

(under subclass 306) Subject matter in which a phase or frequency locked loop provides stability to or synchronization with the secondary source of oscillations.

SEE OR SEARCH CLASS

331, Oscillators,

1+, for phase or frequency locked loops, per se.

375, Pulse or Digital Communications,

327, and 376 for phase locked loops in digital receivers or synchronizers, respectively.