Oscillation circuit, oscillator, electronic apparatus, moving object, and frequency adjustment method of oscillator

摘要

An oscillation circuit includes a voltage controlled oscillation circuit that includes a variable capacitance circuit provided with a variable capacitance element whose capacitance value is controlled on the basis of a control voltage and oscillates a vibrator so as to generate an oscillation signal, and a fractional N-PLL circuit that receives the oscillation signal generated by the voltage controlled oscillation circuit and includes a voltage controlled oscillator which controls an oscillation frequency on the basis of control input data (an integral division ratio and a fractional division ratio).

主权项

1. An oscillation circuit comprising:
a voltage controlled oscillation circuit that controls a frequency of an oscillation signal based on an input voltage; and a PLL circuit that receives the oscillation signal and includes an oscillator which controls an oscillation frequency based on control input data, wherein the oscillation signal is a signal with an amplitude smaller than that of a power supply voltage that is supplied to the oscillation circuit.