Crabo oscillator circuit

Increasing C1, and C2 cannot change the resonant frequency of the circuit . It is an effective method to connect a capacitor
with a smaller capacity in series in the frequency selection circuit . The improved capacitive feedback oscillator circuit is called Krabo oscillator circuit, as shown in the figure.     The reference values ​​of component parameters are as follows:     1) The transistor is 3DG6.     2) Resistance: Rb】=91kfl,Rh2 =llkfl,R.一5.lkfl,R{ -lk0.     3) Capacitance: G =0. OlyF．     4) The values ​​of L, Cl, C2, and C3 are determined by the oscillation frequency of the oscillator. Because G ≤ Cl and C3 ≤ C2, the impact of changes in the unstable capacitance of the transistor on the total capacitance of the loop is reduced. This is Krabo oscillation. Advantages of the circuit .