US PATENT SUBCLASS 331 / 146
.~ Blocking oscillators

Current as of: June, 1999
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331 /   HD   OSCILLATORS

143  DF  RELAXATION OSCILLATORS {6}
146.~ Blocking oscillators {3}
147  DF  .~.~> Using discharge device with plural grids
148  DF  .~.~> With 3 or more winding feedback transformers
149  DF  .~.~> With sync, trigger, or pulsing circuit (e.g., self-pulsing)

DEFINITION

Classification: 331/146

(under subclass 143) Subject matter wherein the relaxation oscillator comprises at least one active element, a closely-coupled transformer coupling the output circuit of the active element to the input circuit in positive feedback relation and a time constant network in the input circuit of the active element, the conduction and relaxation periods of the oscillator being determined by the impedance parameters of the transformer and time constant network.

SEE OR SEARCH THIS CLASS, SUBCLASS:

106, for oscillators for producing periodic pulses of oscillations of varying amplitude and frequency.

112, for blocking oscillators of the transistor type.

173, for oscillators in general of the self-pulsed type for producing periodic bursts or pulses of oscillatory energy.