OSCILLATION CIRCUIT, OSCILLATOR, FRACTIONAL N-PLL CIRCUIT, ELECTRONIC APPARATUS, MOVING OBJECT, AND DETERMINATION METHOD OF REFERENCE FREQUENCY OF FRACTIONAL N-PLL CIRCUIT

摘要

In order to configure an oscillation circuit, an oscillator, a fractional N-PLL circuit, and the like that can output a plurality of frequencies, while decreasing an influence of an integer value boundary spurious at one reference frequency, the oscillation circuit includes a circuit for oscillation that oscillates a resonator, a fractional N-PLL circuit to which a signal from the circuit for oscillation is input, and a non-volatile memory that stores a plurality of division ratios, which can be selected from outside, of the fractional N-PLL circuit. A fractional portion of at least two of the plurality of division ratios is equal to or higher than 0.05 and is equal to or lower than 0.95.