US PATENT SUBCLASS 327 / 1
SPECIFIC SIGNAL DISCRIMINATING (E.G., COMPARING, SELECTING, ETC.) WITHOUT SUBSEQUENT CONTROL

Current as of: June, 1999
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327 /   HD   MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS

1SPECIFIC SIGNAL DISCRIMINATING (E.G., COMPARING, SELECTING, ETC.) WITHOUT SUBSEQUENT CONTROL {11}
2  DF  .~> By phase {1}
13  DF  .~> By shape {3}
18  DF  .~> By presence or absence pulse detection {3}
22  DF  .~> By pulse noncoincidence
23  DF  .~> By pulse coincidence {4}
28  DF  .~> By polarity {2}
31  DF  .~> By pulse width or spacing {7}
39  DF  .~> By frequency {3}
50  DF  .~> By amplitude {9}
98  DF  .~> By separating composite signal
99  DF  .~> Having selection between plural continuous waveforms

DEFINITION

Classification: 327/1

SPECIFIC SIGNAL DISCRIMINATING (E.G., COMPARING, SELECTING, ETC.) WITHOUT SUBSEQUENT CONTROL:

(under the class definition) Subject matter wherein an output signal is derived from one or more input signals by comparing, selecting, or distinguishing a particular input signal parameter and which parameter is not continuously thereafter regulated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

100+, for signal converting, shaping, or generating which may include control of the type of signal parameters found herein.

SEE OR SEARCH CLASS

250, Radiant Energy,

250, for wave meters, subclasses 281+ for systems adapted for ionic separation or analysis and comprising phase or frequency determining devices.

318, Electricity: Motive Power Systems, 683, for electric motor position servomechanisms involving phase comparison devices.

322, Electricity: Single Generator Systems,

32, for automatic frequency control for generator systems.

323, Electricity: Power Supply or Regulation Systems,

212+, for automatic phase control systems restricted to power circuits.

324, Electricity: Measuring and Testing,

76.39+, for frequency measuring or testing of electricity and subclasses 76.77+ for phase comparison systems for measuring or testing electricity and involving plural inputs.

329, Demodulators, appropriate subclasses for demodulators of signals which have been modulated by an intelligence signal.

340, Communications: Electrical,

146.2, for digital comparator systems, subclasses 315, 825.06+, and 870.18+ for electrical circuits whereby an indication or signal is transmitted to a distant point and which signal is indicative of an electrical condition which may comprise phase or frequency difference.

361, Electricity: Electrical Systems and Devices, 236+, for speed-controlled systems involving phase or frequency determining devices.

375, Pulse or Digital Communications,

106+, for synchronization in digital communications.

455, Telecommunications,

130+, for a telecommunication receiver.

714, Error Detection/Correction and Fault Detection/Recovery, appropriate subclasses for error detection or correction of information content of a digital signal.