(under subclass 37) Subject matter wherein means are provided to prevent or compensate for an undesired drift in output frequency of the system. Such drift in frequency may be caused by (1) a change in a circuit parameter (due to ambient temperature variations or to the heating affects of currents in the circuit), (2) changes in active element characteristics, (3) changes in active element electrode potentials, (4) variations in load impedance, (5) undesired pull-in of one oscillator with respect to another oscillator of the system, etc.
SEE OR SEARCH THIS CLASS, SUBCLASS:
1+, for oscillators of the automatic frequency stabilized type.
88, for magnetron type oscillators with means to stabilize the frequency.
175+, for oscillators in general provided with frequency stabilizing means.
