A popular transmitter back in the day was based on the Hartley oscillator (PDF link). Using only a single triode tube and a tuned circuit with coils wound from 1/4″ copper tubing, Hartley ...

Figure 1 This low-distortion, 18-MHz oscillator offers high stability and automatic output-level control. A well-regulated external dc source (not shown) provides 12, –12, and 8V to the circuit ... “A ...

A ring oscillator is a circuit composed of an odd number of inverters ... basic examples of a transistor-based Nonautonomous Chaotic Oscillator and an Autonomous Hartley Chaotic Oscillator. Another ...