CIRCUIT DEVICE AND OSCILLATOR
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United States of America
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Issued Date -
Dec 19, 2024
app pub date -
Mar 22, 2024
filing date -
Mar 22, 2024
priority date (Note) -
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Abstract
A circuit device is configured to switching between a first mode in which phase noise of an output clock signal is low and a second mode in which power consumption is small, and includes an oscillation circuit configured to generate an oscillation signal, an output circuit configured to output the output clock signal, a temperature sensor configured to output a temperature detection signal, a temperature compensation circuit configured to perform temperature compensation on an oscillation frequency based on the temperature detection signal, and a control circuit. The control circuit performs control such that a power supply voltage supplied to the oscillation circuit in the first mode is higher than a power supply voltage supplied to the oscillation circuit in the second mode. In addition, the control circuit performs control such that at least one of a reference voltage supplied to the temperature compensation circuit and a reference current supplied to the temperature sensor does not change between the first mode and the second mode.
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