Patent ID: 9112512
Filing Date: 2015-08-18
Classification: H01L,H03L

Abstract:
1. A circuit device comprising: a current supply circuit adapted to supply an oscillation current; an oscillation circuit having an oscillation transistor for a resonator, and adapted to drive the resonator with the oscillation transistor based on the oscillation current from the current supply circuit; and a control section adapted to control the current supply circuit, wherein the oscillation circuit is configured to operate in one of a normal mode and an overdrive mode, wherein in the normal mode, the resonator is driven at a first drive power and in the overdrive mode, the resonator is driven to a second drive power greater than the first drive power, the oscillation transistor is composed of a plurality of transistors disposed in parallel to each other between a supply node of the oscillation current and a first power supply node, and the control section performs control of increasing the number of the transistors, which operate while being supplied with the oscillation current, in the overdrive mode compared to the normal mode.