Patent ID: 9312809
Filing Date: 2016-04-12
CPC Classification: H03B,Y10T

Claim Text:
1. An oscillation circuit, comprising: a circuit for oscillation; a property adjustment circuit; an output circuit into which a signal output from the circuit for oscillation is input and that outputs an oscillation signal; an amplitude control circuit including an amplitude control portion that controls amplitude of the oscillation signal and a heat generation portion into which a DC current is input and that generates heat; a first terminal that is electrically connected to an output side of the output circuit; and a switching portion that switches the electric connection between the property adjustment circuit and the first terminal, wherein: in the heat generation portion, based on operation states of the circuit for oscillation and the amplitude control portion, the DC current is controlled and a heat generation amount is controlled, in a first mode, the switching portion is controlled so that the property adjustment circuit and the first terminal are not electrically connected to each other, the oscillation signal output from the output circuit is output to the first terminal, and the DC current which is input into the heat generation portion is stopped, and in a second mode, the switching portion is controlled so that the property adjustment circuit and the first terminal are electrically connected to each other, the oscillation signal stops being output from the output circuit, and the heat generation portion controls the DC current based on the operation states of the circuit for oscillation and the amplitude control portion.