Patent ID: 8539834

Claim:
A microelectromechanical gyroscope comprising: a body; a driving mass movable with respect to the body with a first degree of freedom according to a driving axis; a sensing mass mechanically coupled to the driving mass so as to be drawn in motion according to the driving axis and movable with respect to the driving mass with a second degree of freedom according to a sensing axis, in response to rotations of the body; a driving device, forming a microelectromechanical control loop with the body and the driving mass and configured to maintain the driving mass in oscillation according to the driving axis with a driving frequency, the driving device including: a frequency detector coupled to a control node of the microelectromechanical control loop and configured to provide a first clock signal with a frequency equal to a current oscillation frequency of the driving mass; and a synchronization stage coupled to the frequency detector and configured to apply, in a first operation mode, a calibrated phase shift to the first clock signal to compensate for a phase shift arising between the driving mass and the control node, wherein the synchronization stage is configured to provide a second clock signal that, in the first operation mode, has the same frequency as the first clock signal and a phase shift equal to the calibrated phase shift; and an oscillator configured to provide to the synchronization stage a third clock signal having an auxiliary frequency close to the driving frequency.