US PATENT SUBCLASS 331 / 57
RING OSCILLATORS
Current as of: June, 1999
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DEFINITION
Classification: 331/57
(under the class definition) Subject matter wherein the oscillator comprises three or more active elements connected or cascade, the output of one active element being connected to the input of another active element to form a closed chain or loop, the active elements being so connected and biased that they are caused to switch from a conducting to a nonconducting state in succession, cyclically, thereby generating self-sustained oscillations.
SEE OR SEARCH THIS CLASS, SUBCLASS:
45, for polyphase output oscillators which may be of the closed-ring type.
50+, for plural oscillators connected in cascade.
113, for transistor oscillators of the multivibrator type wherein two transistors are alternately switched.
135+, for phase shift oscillators which may comprise plural tubes in cascade in a closed loop, but wherein a switching action of the tubes does not take place.
144+, for multivibrator oscillators in general wherein two tubes are alternately switched.
