(under the class definition) Oscillators wherein the oscillator comprises a two-terminal negative resistance device connected to a tuned circuit, the absolute magnitude of the negative resistance being less than the resonant impedance of the tuned circuit.
(1) Note. A negative resistance is a two-terminal device having a volt-ampere characteristic with negative slope over the range of voltages or currents wherein it is operative, that is, an increase in voltage results in a decrease in current, or vice versa. The term "negative resistance" as employed herein comprehends devices designated as the "negative transconductance" type.
SEE OR SEARCH THIS CLASS, SUBCLASS:
86+, for magnetron oscillators which may be of the negative resistance type.
115, for negative resistance type oscillators of the transistor type.
126+, for oscillators of gaseous space discharge type which may be of the negative resistance type.
SEE OR SEARCH CLASS 333, Wave Transmission Lines and Networks,
213+, for negative resistance device systems, per se.
