(under subclass 86) Subject matter wherein means are provided in the oscillator circuit to prevent or compensate for undesirable drift or change in oscillator frequency caused by changes in (1) space discharge device characteristics or (2) circuit parameters or (3) supply or bias voltages, or any combination or (1), (2) or (3).
(1) Note. This subclass does not provide for oscillators with automatic frequency stabilization wherein means are provided for sensing or detecting an undesired change in oscillator frequency, developing a control or error voltage proportional to such change and applying the control or error voltage to means for varying or adjusting a frequency determining means of the oscillator in such a sense as to bring the oscillator back on frequency. For such subject matter search subclasses 1+ above, particularly subclass 5 for magnetron type oscillators.
SEE OR SEARCH THIS CLASS, SUBCLASS:
5, for oscillators utilizing magnetically controlled space discharge devices and having means to automatically stabilize the frequency. See, also, (1) Note above.
41+, for beat frequency systems with frequency stabilization means.
69, for oscillators with outer casing, housing or shield and wherein a temperature modifier is provided which may aid in stabilizing the oscillator frequency.
175+, for frequency stabilized oscillators in general and not provided for in any preceding subclass.
