US PATENT SUBCLASS 318 / 629
.~ Unwanted harmonic or voltage component elimination quadrature rejection systems


Current as of: June, 1999
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318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

560  DF  POSITIONAL SERVO SYSTEMS (E.G., SERVOMECHANISMS) {23}
629.~ Unwanted harmonic or voltage component elimination quadrature rejection systems


DEFINITION

Classification: 318/629

(under subclass 560) Subject matter in which means are provided to eliminate from any of the servo loop signals an unwanted harmonic, an undesirable voltage component, or a quadrature component.

(1) Note. For example, an unwanted harmonic may be eliminated by the use of filtering.

(2) Note. For example, an undesirable voltage or quadrature signal may be bucked out of the system by introducing a signal of equal but opposite magnitude.

SEE OR SEARCH CLASS

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

549, for miscellaneous circuits with hum or interaction prevention and subclasses 551+ for miscellaneous unwanted signal elimination.

363, Electric Power Conversion Systems, 39+, for electrical conversion systems including means to eliminate an unwanted harmonic.