US PATENT SUBCLASS 327 / 231
.~ Phase shift by less than period of input

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.~ Phase shift by less than period of input {7}
232  DF  .~.~> Dependent on frequency
233  DF  .~.~> Correction to specific phase shift {3}
237  DF  .~.~> Variable or adjustable {9}
254  DF  .~.~> Quadrature related (i.e., 90 degrees) {1}
256  DF  .~.~> Phase inversion (i.e., 180 degrees between input and output) {1}
258  DF  .~.~> Multiple outputs {1}
260  DF  .~.~> Producing AC power control

DEFINITION

Classification: 327/231

Phase shift by less than period of input:

(under subclass 100) Subject matter wherein a fraction of the period of an input periodic wave signal (with one period represented as 360 degrees along the time axis) is maintained or shifted.

SEE OR SEARCH THIS CLASS, SUBCLASS:

2+, for phase angle sensing without subsequent control.

141+, for time or phase control of one signal to cause synchronization with another signal.

261+, for specific delay in producing output waveforms.

392+, for delay controlled switching.

SEE OR SEARCH CLASS

323, Electricity: Power Supply or Regulation Systems, 212+, for electric power phase shift or control circuits.

331, Oscillators,

1+, for automatic frequency stabilization using phase of frequency sensing means and for phase lock loop circuits in oscillator circuits and systems.

363, Electric Power Conversion Systems, appropriate subclasses for phase conversion circuits with control or error correction.