Parallel resonant crystal oscillator composed of Gate circuit

Published:2011/11/27 20:28:00 Author:Ecco | Keyword: Parallel resonant , crystal oscillator , Gate circuit | From:SeekIC

When the quartz crystal under the action of the applied voltage, it will produce a piezoelectric effect, then the quartz crystal produces the mechanical vibrations, when the frequency of the applied voltage and crystal's natural oscillation is the same, the crystal 's mechanical amplitude is the largest and the alternating electric field will be largest to form piezoelectric resonator. The reactance frequency characteristics of quartz crystal reactance show that it has two closed resonance volume ratio, one is the series resonant frequency , the other one is parallel resonant frequency , when the crystal is in series resonance, the reactance is minimum, when it is in parallel resonance, the reactance is maximum, when it is between two frequency ranges, the crystal shows inductive , when it is free from two frequency ranges, the crystal shows capacitive.



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