US PATENT SUBCLASS 331 / 111
.~.~ Relaxation oscillator

Current as of: June, 1999
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331 /   HD   OSCILLATORS

107 R  DF  SOLID STATE ACTIVE ELEMENT OSCILLATOR {6}
108 R  DF  .~ Transistors {11}
111.~.~ Relaxation oscillator {2}
112  DF  .~.~.~> Blocking oscillator type
113 R  DF  .~.~.~> Multivibrator type {2}

DEFINITION

Classification: 331/111

(under subclass 108) Oscillators for generating nonsinusoidol waves which are cyclic in nature and wherein each cycle consists of a period determined by the charging time of a capacitor or inductor of the oscillator followed by a period determined by the discharge time of the capacitor or inductor through a resistive element of the oscillator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

129+, for relaxation oscillators of the gaseous space discharge type.

143+, for relaxation oscillators in general not provided for in a preceding subclass. See also the search notes appended to subclass 143 as to further fields of search relating to relaxation oscillators.

SEE OR SEARCH CLASS

307, Electrical Transmission or Interconnections Systems,

401+, for relaxation systems utilizing nonlinear reactors which systems are not of the free-running type. 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.