| CPC H03B 5/04 (2013.01) [H03B 5/36 (2013.01)] | 13 Claims |
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1. A circuit apparatus comprising:
a clock signal generation circuit configured to generate a clock signal based on an oscillation signal generated by oscillating a resonator;
an output circuit configured to operate in a first state or a second state in which a consumption current is different from that in the first state and output at least one output clock signal based on the clock signal; and
a temperature compensation circuit configured to, based on a temperature detection signal from a temperature sensor, compensate for a frequency-temperature characteristic of the clock signal, wherein
when the output circuit operates in the first state,
the temperature compensation circuit outputs a first temperature compensation signal that compensates for the frequency-temperature characteristic when the output circuit operates in the first state, and
the clock signal generation circuit generates the clock signal based on the first temperature compensation signal, and
when the output circuit operates in the second state,
the temperature compensation circuit outputs a second temperature compensation signal that compensates for the frequency-temperature characteristic when the output circuit operates in the second state and that is different from the first temperature compensation signal, and
the clock signal generation circuit generates the clock signal based on the second temperature compensation signal.
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