US PATENT SUBCLASS 331 / 143
RELAXATION OSCILLATORS

Current as of: June, 1999
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331 /   HD   OSCILLATORS

143RELAXATION OSCILLATORS {6}
144  DF  .~> Multivibrators {1}
146  DF  .~> Blocking oscillators {3}
150  DF  .~> Output supplied to another discharge device circuit
151  DF  .~> Involving resonant or inductive wave forming circuit or transformer
152  DF  .~> Multi-grid discharge device in charged capacitor circuit
153  DF  .~> With sync, trigger or pulsing circuit

DEFINITION

Classification: 331/143

(under the class definition) Oscillators for generating nonsinusoidal waves which are cyclic in nature and wherein

each cycle consists of a period determined by the charging time of a capacitor or inductor followed by a period determined by the discharging time of the capacitor or inductor through a resistive element.

(1) Note. Relaxation oscillators to be classified herein must be free-running. Nonfree-running relaxation oscillators are classified in Class 327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems.

SEE OR SEARCH THIS CLASS, SUBCLASS:

20+, for relaxation oscillators of the television synchronized type involving automatic frequency control.

59, for an oscillator which may be converted from one type of oscillator to another, e.g., sinusoidal oscillator to relaxation oscillator.

61, for single oscillators for producing plural outputs simultaneously which outputs are of diverse wave form, e.g., sine wave and square wave. 78, for electrical noise or random frequency generators.

111+, for relaxation oscillators of the transistor type.

129+, for relaxation oscillators utilizing gaseous space discharge devices.

SEE OR SEARCH CLASS

307, Electrical Transmission or Interconnection Systems,

401+, for nonlinear reactor type and subclass 132 for free-running electromagnetic circuit maker and breaker type pulse producers.

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems, appropriate subclasses for miscellaneous relaxation circuits and

185+, for such circuits which may utilize a stable state circuit.