Driving crystal oscillator startup at above, below and operating frequency
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United States of America Patent
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Dec 6, 2016
Grant Date -
Nov 19, 2015
app pub date -
Dec 29, 2014
filing date -
May 19, 2014
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Abstract
A circuit includes a crystal oscillator to generate an output frequency for a circuit. A driving oscillator generates a startup signal having a driving frequency that is provided to activate the crystal oscillator. The driving frequency of the startup signal is varied over a range of frequencies that encompass the operating frequency of the crystal oscillator to facilitate startup of the crystal oscillator.
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