Parallel crystal oscillator

The actual circuit of a typical crystal oscillator is shown in the figure
. This circuit meets the composition principles of a three-point oscillator
and is a capacitor feedback oscillator. When the oscillation frequency of the oscillator
is between the series resonant frequency and the parallel resonant frequency of the crystal
, the crystal is inductive and the oscillator can oscillate.
This circuit is often called a Pierce oscillator and
a parallel crystal oscillator.
    The transistor is 3DG6C, and other parameters
are shown in Figure 21-31. The operating frequency of the Pierce oscillator is determined by the loop composed of
    c1, G, C3 and the crystal. The oscillation frequency of the parallel crystal oscillator is between the series resonant frequency and the parallel resonant frequency of the quartz crystal circuit .