Patent ID: 11929710
Assignee: SEIKO EPSON CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 12:
13. An oscillator comprising:
a resonator;
an oscillation circuit configured to oscillate the resonator;
a first temperature compensation circuit configured to perform a first temperature compensation processing of temperature-compensating for a frequency of a first clock signal generated by oscillation of the resonator by the oscillation circuit; and
a second temperature compensation circuit configured to receive the first clock signal subjected to the first temperature compensation processing, and to output a second clock signal subjected to a second temperature compensation processing based on the first clock signal, wherein
the first temperature compensation circuit is configured to perform a first-order first temperature compensation processing as the first temperature compensation processing,
the second temperature compensation circuit is configured to perform a high-order second temperature compensation processing as the second temperature compensation processing,
the oscillator circuit is configured to output only the second clock signal as an output clock signal of the oscillator,
the first temperature compensation circuit is configured to
perform, in a first mode, the first-order first temperature compensation processing as the first temperature compensation processing, and
perform, in a second mode, the first-order first temperature compensation processing and a high-order first temperature compensation processing as the first temperature compensation processing, and

the oscillator is set to the first mode when the oscillator is used as an oven controlled oscillator that controls a temperature of the resonator.