US PATENT SUBCLASS 327 / 291
.~ Clock or pulse waveform generating

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}
291.~ Clock or pulse waveform generating {11}
292  DF  .~.~> Clock fault compensation or redundant clocks
293  DF  .~.~> With plural paths in network {1}
295  DF  .~.~> Plural outputs {2}
298  DF  .~.~> Single clock output with multiple inputs
299  DF  .~.~> Single clock output with single clock input or data input
300  DF  .~.~> With saturable inductance
301  DF  .~.~> With electron beam type tube
302  DF  .~.~> With storage diode
303  DF  .~.~> With rectifier
304  DF  .~.~> With inductive device (e.g., transformer, etc.)
305  DF  .~.~> With gas tube

DEFINITION

Classification: 327/291

Clock or pulse waveform generating:

(under subclass 100) Subject matter wherein an output waveshape is produced which exhibits two distinct amplitude levels and where the transition therebetween is rapid.

(1) Note. The systems contained in this subclass and the indented subclasses are very similar to those found in Class 331, Oscillators; the distinction being that the systems in Class 331 are self sustaining or free running while those in this class are not capable of self-sustained continuous operation.

(2) Note. Bias circuits of the pulsing type which establish device operating points are classified with the bias circuits.

SEE OR SEARCH THIS CLASS, SUBCLASS:

104, for systems which convert AC to corresponding DC at an unloaded output.

185+, for stable state circuits (e.g., mono-stable or bistable) which may provide a pulse.

309+, for systems wherein the output represents the input waveform with the peaks thereof clipped or limited between certain levels.

336+, for integrating networks. 544, for circuits with power conservation or pulse type source of supply or bias.

554, for a switched capacitor filter having an input which accepts a clock signal.

SEE OR SEARCH CLASS

128, Surgery,

419+, for systems wherein an alternating current is converted to pulses of energy for application to the human body.

178, Telegraphy, appropriate subclasses for pulse producing systems wherein the pulses are representative of a telegraph code, particularly

17+, for such systems where a perforated tape or other automatic device controls the production of the pulses, subclasses 2+ for systems where a keyboard is used to produce the pulses.

307, Electrical Transmission or Interconnection Systems,

106+, for class appropriate waveform or wave shape determinative or pulse producing systems and subclasses 401+ for nonlinear reactor systems.

315, Electric Lamp and Discharge Devices: Systems,

137+, for polyphase AC supply and subclasses 246+ for gaseous tube systems with pulsating or AC supply. 324, Electricity: Measuring and Testing,

119, for measuring systems involving rectification.

331, Oscillators, appropriate subclasses, for self-sustained generators, particularly

20+, for TV oscillators with automatic frequency stabilization, subclass 61 for oscillators with plural outputs of diverse waveforms, subclass 75 for oscillators combined with wave shaping networks in the output circuit, subclass 87 for magnetron type oscillators with pulse forming means in the control circuit thereof, subclasses 143+ for pulse forming networks of the relaxation oscillators type, subclasses 165+ for shock excited resonant circuit with pulse type keying, and subclasses 172+ for synchronizing, triggering, or pulsing circuits for oscillators.

332, Modulators,

106+, for pulse modulators where the nature of the pulses is varied in an arbitrary manner.

333, Wave Transmission Lines and Networks,

20, for wave shaping systems utilizing a passive element.

340, Communications: Electrical, appropriate subclasses, particularly

825.57+, for pulse responsive selective systems; subclasses 870.19+ for pulse modulation telemetering systems; and subclasses 287+ for electric signaling system with

transmission of a train of pulse signals.

341, Code Data Generation or Conversion, 20+, and 173+ for a pulse code transmitter, and subclasses 50+ for digital to digital code converters.

342, Communications, Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation), appropriate subclasses for pulse reflected wave systems, particularly

118+, and 147+ for radar type systems involving pulse generating for determining distance or direction.

361, Electricity: Electrical Systems and Devices,

182+, for single and plural relays which are frequency responsive, subclass 185 for phase responsive relays, and subclass 186 for pulse responsive relays.

363, Electric Power Conversion Systems,

13+, for current conversion (i.e., rectification or derectification) systems.

370, Multiplex Communications,

205, 212, and 213 for transmitting different messages involving pulse modulation.

375, Pulse or Digital Communications,

37, for miscellaneous telegraph systems using pulsating currents and subclasses 59+ for transmitters with pulse production.

378, X-Ray or Gamma Ray Systems or Devices 104, for X-ray electrical systms utilizing rectifying means with AC or pulsating supply.

379, Telephonic Communication, appropriate subclasses for telephone pulse producing systems.