Oscillation circuit, electronic apparatus, and moving object

摘要

An oscillation circuit is connected to a resonator element (crystal resonator) and oscillates a resonator element to output an oscillation signal. The oscillation circuit includes an amplification element (inverter), and a set of variable capacitive elements having at least two variable capacitive elements, which are connected to an oscillation loop from an output to an input of the amplification element and the capacitance values thereof are controlled with potential differences between reference voltages and a variable control voltage. In each variable capacitive element of a set of variable capacitive elements, the common control voltage is applied to one terminal, and the reference voltage which differs between the variable capacitive elements is input to the other terminal.

主权项

1. An oscillation circuit which is connected to a resonator element and oscillates the resonator element to output an oscillation signal, the oscillation circuit comprising:
an amplification element; and a set of variable capacitive elements having at least two variable capacitive elements, which are connected to an oscillation loop from an output to an input of the amplification element and the capacitance values of which are controlled with potential differences between reference voltages and a variable control voltage, wherein, in each variable capacitive element of the set of variable capacitive elements, the common control voltage is applied to one terminal, and the reference voltage which differs between the variable capacitive elements is applied to the other terminal, and wherein the oscillation circuit has a function of adjusting the reference voltages.