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Microelectromechanical gyroscope with open loop reading device and control method

  • US 8,037,756 B2
  • Filed: 02/13/2008
  • Issued: 10/18/2011
  • Est. Priority Date: 02/13/2007
  • Status: Active Grant
First Claim
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1. A microelectromechanical gyroscope, comprising:

  • a first mass oscillatable according to a first axis;

    an inertial sensor, including a second mass, drawn along by the first mass and constrained so as to oscillate according to a second axis in response to a rotation of the gyroscope;

    a driving device coupled to the first mass so as to form a feedback control loop and configured to maintain the first mass in oscillation at a resonance frequency;

    an open-loop reading device coupled to the inertial sensor and adapted to detect displacements of the second mass according to the second axis; and

    a read signal generator adapted to supply to the inertial sensor at least one read signal having the form of a square-wave signal of amplitude that sinusoidally varies with the resonance frequency.

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