| 摘要 |
<p>A microelectromechanical device includes a body (2a), a movable mass (2b), elastically connected to the body (6; 106) and movable in accordance with a degree of freedom, and a driving device (6), coupled to the movable mass (2b) and configured to maintain the movable mass (2b) in oscillation at a steady working frequency ( É D ) in a normal operating mode. The microelectromechanical device moreover includes a start-up device (7, 8, 10), which is activatable in a start-up operating mode and is configured to compare a current oscillation frequency ( É A ) of a first signal (CK A ) correlated to oscillation of the movable mass (2b) with a reference frequency ( É R ), and for deciding, on the basis of the comparison between the current oscillation frequency ( É A ) and the reference frequency ( É R ), whether to supply to the movable mass (2b) a forcing signal packet (V F ) so as to transfer energy to the movable mass (2b).</p> |
