The different types of oscillators are; Crystal Oscillator, Armstrong Oscillator, Hartley oscillator,Cross-Coupled Oscillator, Colpitts Oscillators,Dynatron Oscillator, RC Phase Shift Oscillator, Meissner Oscillator, Optoelectronic Oscillator, Phase Shift Oscillator, Wein Bridge Oscillator, Robinson Oscillator, Tri-Tet ...