| 摘要 |
An oscillation circuit includes a first variable capacitance part which includes a first variable capacitance element whose capacitance is controlled on the basis of a potential difference between a first control voltage and a first reference voltage, and is connected to the oscillation circuit, a second variable capacitance part which includes a second variable capacitance element whose capacitance is controlled on the basis of a potential difference between a first control voltage and a second reference voltage, and is connected to the oscillation circuit. If composite capacitance in the first variable capacitance part excluding the first variable capacitance element is first composite capacitance, composite capacitance in the second variable capacitance part excluding the second variable capacitance element is second composite capacitance, and if the second composite capacitance is greater than the first composite capacitance, the second variable capacitance element having capacitance greater than the first variable capacitance element is used. |
