US PATENT SUBCLASS 318 / 621
.~.~ Lead or lag networks

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

560  DF  POSITIONAL SERVO SYSTEMS (E.G., SERVOMECHANISMS) {23}
611  DF  .~ With stabilizing features (e.g., anti-hunting, damping) {8}
621.~.~ Lead or lag networks {1}
622  DF  .~.~.~> A.C. networks

DEFINITION

Classification: 318/621

(under subclass 611) Subject matter in which the stabilizing means is a lead or lag circuit or a combination of both. A "lead" circuit is defined as a circuit whose output voltage leads the input voltage over a certain range of frequencies. Sometimes it may be referred to as an "integrating" circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

609, for "reset" servomechanisms which use integral and differential compensation.

SEE OR SEARCH CLASS

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

335, for miscellaneous differentiating circuits and subclasses 336+ for miscellaneous integrating circuits.