US PATENT SUBCLASS 327 / 114
.~.~ Of output rectangular waveform

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


327 /   HD   MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS

100  DF  SIGNAL CONVERTING, SHAPING, OR GENERATING {29}
113  DF  .~ Frequency or repetition rate conversion or control {3}
114.~.~ Of output rectangular waveform {2}
115  DF  .~.~.~> Frequency division
116  DF  .~.~.~> Frequency multiplication

DEFINITION

Classification: 327/114

Of output rectangular waveform:

(under subclass 113) Subject matter including maintaining constant or varying the repetition rate of a continuous series of pulses having negligible transition times and available at a specific circuit location for subsequent utilization.

SEE OR SEARCH THIS CLASS, SUBCLASS:

39+, for frequency sensitive systems and see also the search notes thereunder.

SEE OR SEARCH CLASS

84, Music,

600+, for apparatus for generating or modifying electric currents or potentials to produce varying electric currents or potentials in combination with or intended for use in converting the varying electric currents or potentials into musical tones.

250, Radiant Energy,

250, for wave meters which may employ frequency changing. 307, Electrical Transmission or Interconnection Systems,

424, for parametric amplifier frequency converters.

324, Electricity: Measuring and Testing,

79, for electric wave frequency measuring systems of the heterodyne type.

329, Demodulators,

323+, for a frequency demodulator with a local oscillator and subclass 346 for a phase demodulator with a local oscillator.

331, Oscillators,

37+, for beat frequency oscillator systems and subclass 76 for systems including an oscillator combined with a harmonic producing or selecting network in the output. (To be classified in Class 331 the oscillator must be the signal

source and must be capable of self sustained oscillation).

332, Modulators, appropriate subclasses for systems wherein a first source of one frequency is modified in frequency or phase by mixing with an arbitrarily varying control source of another frequency or frequencies.

340, Communications: Electrical, appropriate subclasses for systems whereby information is conveyed from one point to another by pulses arranged in a particular sequence or whose height or duration are varied to represent the particular information to be conveyed, particularly

870.01+, for telemetering systems, and subclasses 870.18+ for such systems providing frequency or phase modulation. 375, Pulse or Digital Communications, appropriate subclasses for pulse communication systems which utilize phase or frequency modulation.

377, Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems, for pulse counters or counting systems.