US PATENT SUBCLASS 327 / 122
.~.~.~ Doubling

Current as of: June, 1999
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327 /   HD   MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS

100  DF  SIGNAL CONVERTING, SHAPING, OR GENERATING {29}
113  DF  .~ Frequency or repetition rate conversion or control {3}
119  DF  .~.~ Frequency multiplication (e.g., harmonic generation, etc.) {3}
122.~.~.~ Doubling

DEFINITION

Classification: 327/122

Doubling:

(under subclass 119) Subject matter wherein the frequency of the output wave is exactly twice the frequency of the input wave independent of the input frequency.

(1) Note. Included in this subclass are systems in which the claimed subject matter is restricted to frequency doublers even though the system singularly or in combination with similar systems may be used as a frequency multiplier other than a doubler.