Oscillator, electronic apparatus, and moving object
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United States of America Patent
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Dec 6, 2016
Grant Date -
Aug 4, 2016
app pub date -
Jan 21, 2016
filing date -
Jan 21, 2016
priority date (Note) -
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Abstract
An oscillator includes an oscillation element, an oscillation circuit, a heat generation element, a temperature control circuit, and a temperature correction signal generation circuit adapted to generate a temperature correction signal used to correct a frequency-temperature characteristic. The temperature correction signal generation circuit includes a temperature sensor, a first-order correction signal generation circuit adapted to generate a first-order correction signal, and a high-order correction signal generation circuit adapted to generate a high-order correction signal. The high-order correction signal generation circuit includes a high-temperature side second-order correction signal generation circuit, a high-temperature side polarity switching circuit adapted to switch a polarity of a high-temperature side second-order correction signal, a low-temperature side second-order correction signal generation circuit, and a low-temperature side polarity switching circuit adapted to switch a polarity of a low-temperature side second-order correction signal.
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