Patent ID: 11863124
Assignee: SEIKO EPSON CORPORATION
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A circuit device, comprising:
an oscillation circuit configured to oscillate a resonator;
a temperature compensation circuit configured to output a temperature compensation voltage for temperature compensating an oscillation frequency of the oscillation circuit, based on a temperature detection result of a temperature sensor; and
a frequency control circuit configured to output a frequency control voltage for the oscillation frequency, wherein
the oscillation circuit includes
a first variable capacitance circuit whose capacitance change characteristic with respect to a capacitance control voltage is a positive characteristic, and
a second variable capacitance circuit whose capacitance change characteristic with respect to the capacitance control voltage is a negative characteristic,

the temperature compensation circuit supplies the temperature compensation voltage as the capacitance control voltage to the first variable capacitance circuit, and
the frequency control circuit supplies the frequency control voltage as the capacitance control voltage to the second variable capacitance circuit.