Patents Assigned to Asulab A.S.
  • Resonator vibrating in a thickness-shear mode
    Patent number: 4618798
    Abstract: A resonator (1) is described for vibrating in a thickness-shear mode and has auxiliary electrodes (7f, 8d) between the zone of its main excitation electrodes (3, 4) and the zone of its connection terminals (5, 6) to generate an auxiliary vibration in opposition of phase with respect to the main vibration.The presence of the auxiliary electrodes (7f, 8d) improves notably the quality factor of the resonator.
    Type: Grant
    Filed: February 28, 1985
    Date of Patent: October 21, 1986
    Assignee: Asulab A.S.
    Inventor: Walter Zingg