萝莉影视

Generally, oscillations circuits fall into the following three classes:

 Of the above circuits, the CERALOCK^?, quartz crystal units and LC circuits use the first method. Colpitts circuit and Hartley circuit are typical examples of LC positive feedback and tuned antibonding oscillation circuit, see below.

The above circuits use the most fundamental transistors as amplifiers. The oscillation frequency of the Colpitts and Hartley circuit is approximately the same as the resonant frequency of the circuit comprised of L, CL1 and CL2 and that of the circuit comprised of L1 and L2, respectively. The oscillation frequency of these circuits is individually expressed by the following formulae:

The Colpitts circuit uses an inverting amplifier (theta1=180°), and also uses "L" and "C" in the feedback circuit for further inversion (theta2=180°). When the CERALOCK^? is used in the oscillation circuit, it is based on the same operating principle. To build the Colpitts oscillation circuit using the CERALOCK^?, the method of using an inverter is most commonly and easily available.