Circuit device, oscillator, real-time clock device, electronic device, and vehicle
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United States of America Patent
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Jun 15, 2021
Grant Date -
Feb 25, 2021
app pub date -
Aug 21, 2020
filing date -
Aug 22, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
A circuit device includes an oscillation circuit and a processing circuit. The oscillation circuit includes a variable capacitance circuit configured by a capacitor array and oscillates at an oscillation frequency corresponding to the capacitance value of the variable capacitance circuit. First temperature data and second temperature data subsequent to the first temperature data are input to the processing circuit as temperature data. In the period between the start of the capacitance control based on the first temperature data and the start of the capacitance control based on the second temperature data, the processing circuit switches the first capacitance control data corresponding to the first temperature data and the second capacitance control data different from the first capacitance control data in a time-division manner to be output to the variable capacitance circuit.
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