公开(公告)号：US5008581A

公开(公告)日：1991-04-16

申请号：US335374

申请日：1989-04-10

申请人： Akio Kumada ,  Takahiko Iochi ,  Minoru Okada

发明人： Akio Kumada ,  Takahiko Iochi ,  Minoru Okada

IPC分类号： H02N2/00 ,  H01L41/09 ,  H02N2/16

CPC分类号： H02N2/002 ,  H02N2/103

摘要： A piezoelectric revolving resonator is disclosed in which a piezoelectric ceramic material in the form of a disk, a cylinder or a pipe is polarized so that two regions divided by its diameter are different in polarity from each other, and electrodes are provided to form equipotential surfaces on opposite principal surfaces and a resonant condition in which piezoelectric deformations are revolved is excited by a single-phase alternating current voltage. Due to the single-phase drive, the structures of the resonator and the drive circuit can be simplified.