US PATENT SUBCLASS 327 / 238
.~.~.~ Quadrature related (i.e., 90 degrees)

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}
231  DF  .~ Phase shift by less than period of input {7}
237  DF  .~.~ Variable or adjustable {9}
238.~.~.~ Quadrature related (i.e., 90 degrees)

DEFINITION

Classification: 327/238

Quadrature related (i.e., 90 degrees):

(under subclass 237) Subject matter wherein the variable or adjustable phase shift control involves the state or condition of two related periodic functions or two related points separated by a quarter of a cycle or 90 electrical degrees.

SEE OR SEARCH THIS CLASS, SUBCLASS:

254, for quadrature related phase shift control which is not variable or adjustable.

SEE OR SEARCH CLASS

324, Electricity: Measuring and Testing,

76.78, for quadrature sensing, per se.