Voltage controlled oscillator (VCO) is a variable capacitance diode tuned LC circuit

In all radio and television applications, diode a voltage controlled oscillator (VCO) is a type of variable capacitance diode tuned LC circuit. In this electronic engineering circuit, you can see a very simple and efficient Colpitts oscillator used in higher frequency ranges, above 50 MHz. The Colpitts oscillator uses capacitors in the stray circuit, which not only provide the required feedback capacitance, but also avoid the possibility of adverse effects caused by Hartley's tap coil design?? Scattering resonance. Display the base design of the frequency modulated VCO feedback from collector to emitter and ground.diode

A Colpitts oscillator is a design of a combined electronic oscillator circuit that uses frequency determined capacitors and inductors. The notable feature of the Colpitts oscillator circuit is that the feedback signal is generated by two series connected capacitive voltage dividers. As you can see in the circuit diagram, this type of electronic engineering requires some electronic components to provide a 2:1 tuning range for a 50MHz-300MHz VCO.diode