Crystal oscillator and electronic device using the crystal oscillator
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United States of America Patent
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Aug 24, 2021
Grant Date -
Apr 30, 2020
app pub date -
Sep 30, 2019
filing date -
Oct 29, 2018
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Abstract
A crystal oscillator is provided. The crystal oscillator includes a crystal resonator including a pair of terminals and being capable of oscillating at a fundamental resonance frequency and at least one overtone resonance frequency. Further, the crystal oscillator includes an inverter circuit coupled between the pair of terminals. The crystal oscillator additionally includes a suppression circuit configured to suppress oscillation of the crystal resonator at the fundamental resonance frequency. Further, the crystal oscillator includes a control circuit configured to control a switch circuit for selectively coupling the suppression circuit to the crystal resonator.
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