48MHz HCMOS Oscillator Circuit

Published:2011/6/30 4:17:00 Author:Joyce | Keyword: 48MHz , HCMOS , Oscillator | From:SeekIC

As shown in the figure is a 48MHz crystal oscillator composed of HCMOS integrated circuit. The fundamental frequency of the crystal is 16MHz, but the oscillator is compelled to work on triple frequency harmonic. The importance of harmonic oscillator is to inhibit the fundamental frequency of the crystal. The parallel resonant circuit in the graph will resonate on the basis of the fundamental frequency of the crystal, when it is connected with crystal and SJT in series, the impedance to the fundamental frequency will be the highest, thus it can effectively refrain the fundamental frequency from oscillation and ensure the oscillation of the triple frequency harmonic.



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