Main circuit working principle - This circuit is actually a low-power frequency modulation transmitter,
The phase-locked frequency stabilization circuit - phase detector is the core part of frequency stabilization,
Therefore, the parameters r1, r2, and c of the loop filter should be adjusted to make bl less than 30hz.
The V-I 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,
