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,
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,
