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.

主权项

1. An oscillation circuit comprising:
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 storage unit that stores a plurality of division ratios, which can be selected from outside, of the fractional N-PLL circuit, wherein 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.