In all radio and television applications, a voltage controlled oscillator (VCO) is a type of variable capacitance diode tuned LC circuit.
The volt ampere characteristic curve of a varactor diode is the same as that of a regular diode,
Abstract: This article introduces a phase-locked loop circuit that uses VCO to achieve frequency modulation,
The principle of direct frequency modulation of varactor diode - the diode can change the width of the space charge region by changing the applied reverse voltage, thereby changing the size of the potential barrier capacitance.
Phase locked frequency stabilization technology - For direct frequency modulation circuits with variable capacitance diodes,
Main circuit working principle - This circuit is actually a low-power frequency modulation transmitter,
