Oscillation circuit, oscillator, method of manufacturing oscillator, electronic device, and moving object
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United States of America Patent
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Apr 18, 2017
Issued Date -
N/A
app pub date -
Oct 29, 2014
filing date -
Oct 30, 2013
priority date (Note) -
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Abstract
An oscillation circuit includes a terminal XO, a terminal XI, an oscillation unit, and a voltage generation circuit that generates a first voltage and a second voltage. The oscillation unit includes a variable capacitive element connected to the terminal XO or the terminal XI. In a first mode, a signal having a first amplitude is applied between the terminal XO and the terminal XI, and a first voltage is applied to the other end of the variable capacitive element. In a second mode, a signal having a second amplitude larger than an amplitude of the signal having the first amplitude is applied between the terminal XO and the terminal XI, a second voltage is applied to the other end of the variable capacitive element, and a voltage applied to the both ends of the variable capacitive element is lower than the maximum rated voltage of the variable capacitive element.
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