The Quartz crystal oscillator circuit

Published:2011/7/13 6:43:00 Author:Christina | Keyword: Quartz crystal, oscillator | From:SeekIC

The oscillator that is composed of the quartz crystal can be divided into two kinds: the parallel resonant type crystal oscillator and the series resonant type crystal oscillator. The parallel resonant type crystal oscillator and the AC equivalent circuit of it are as shown in figure 1, if the quartz crystal is equivalent to the inductance LD, this circuit is the three-point capacitor oscillator, and only when the frequency is in the range of fo to f∞, the quartz crystal will present the inductance characteristics. Figure 1 The parallel resonant type crystal oscillator and the AC equivalent circuit Figure 2 shows the series resonant type crystal oscillator circuit and the AC equivalent circuit of it. Figure 2 The series resonant type crystal oscillator circuit and the AC equivalent circuit



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