US PATENT SUBCLASS 327 / 309
.~.~ By limiting, clipping, or clamping

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}
306  DF  .~ Amplitude control {5}
309.~.~ By limiting, clipping, or clamping {10}
310  DF  .~.~.~> Transient or signal noise reduction {4}
315  DF  .~.~.~> Providing constant input/output amplitude level ratio {1}
317  DF  .~.~.~> Distortion compensation
318  DF  .~.~.~> In input or output circuit {3}
323  DF  .~.~.~> Feedback
324  DF  .~.~.~> By using diverse-type nonlinear devices
325  DF  .~.~.~> Using only diode active elements {1}
327  DF  .~.~.~> Using only transistor active elements {1}
329  DF  .~.~.~> With tuned circuit
330  DF  .~.~.~> With rectifier or nonlinear impedance

DEFINITION

Classification: 327/309

By limiting, clipping, or clamping:

(under subclass 306) Subject matter wherein (a) the output

signal amplitude is constrained by a maximum allowed level, a minimum allowed level or both or (b) the upper or lower amplitude extreme of the output signal is maintained at a particular level.

SEE OR SEARCH CLASS

323, Electricity: Power Supply or Regulation Systems,

234+, for a power supply which is output level responsive.

330, Amplifiers,

96, 123, 127+, and 278+ for automatic signal level and gain control or amplitude limiting of amplifier power supplies.

331, Oscillators, 182+, for amplitude control of oscillator output.

333, Wave Transmission Lines and Networks,

14, for amplitude compression and expansion systems (i.e., companders); and subclasses 15, 16, 17.1+, and 81+ for passive element attenuator systems which control signal amplitude.

348, Television,

571+, for amplitude control such as limiting or clamping in a television receiver.

375, Pulse or Digital Communications,

34, 60, and 99+ for noise reduction in pulse code modulation, transmitters, and receivers and subclass 98 for automatic gain control in receivers.

455, Telecommunications,

218+, 278+, 296+, and 501+ for noise or interference elimination in analog communication and subclasses 234+ for attenuators and automatic gain control circuits in receiver or analog modulated frequency converters.