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公开(公告)号：US08796903B2
公开(公告)日：2014-08-05
申请号：US13303699
申请日：2011-11-23
IPC分类号： H02N2/06
CPC分类号： H02P31/00 , H01L41/042 , H02P25/032
摘要： One embodiment provides a piezoelectric vibrator driving circuit for driving a piezoelectric vibrator, the piezoelectric vibrator having an equivalent circuit in which an LC series resonance circuit, an equivalent resistor Rx connected in series thereto and a damping capacitor Co connected in parallel to them are provided, the driving circuit is configured: to detect a driving current Iz flowing through the entire piezoelectric vibrator; to detect a damping current Iy flowing through the damping capacitor Co; to calculate a series resonance current Ix flowing through the LC series resonance circuit by subtracting the detected damping current Iy from the detected driving current Iz; and to perform a phase adjustment so that a phase difference between the calculated series resonance current Ix and a driving voltage Ve to be applied to the piezoelectric vibrator becomes approximately 0.
摘要翻译： 一个实施例提供了一种用于驱动压电振动器的压电振动器驱动电路，该压电振子具有串联连接的LC串联谐振电路，等效电阻器Rx和与它们并联连接的阻尼电容器Co的等效电路， 驱动电路被配置为检测流过整个压电振动器的驱动电流Iz; 以检测流过阻尼电容器Co的阻尼电流Iy; 通过从检测到的驱动电流Iz减去检测到的阻尼电流Iy来计算流过LC串联谐振电路的串联谐振电流Ix; 并且进行相位调整，使得计算出的串联谐振电流Ix与施加到压电振动器的驱动电压Ve之间的相位差变为约0。
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公开(公告)号：US20120133307A1
公开(公告)日：2012-05-31
申请号：US13303699
申请日：2011-11-23
IPC分类号： H02P31/00
CPC分类号： H02P31/00 , H01L41/042 , H02P25/032
摘要： One embodiment provides a piezoelectric vibrator driving circuit for driving a piezoelectric vibrator, the piezoelectric vibrator having an equivalent circuit in which an LC series resonance circuit, an equivalent resistor Rx connected in series thereto and a damping capacitor Co connected in parallel to them are provided, the driving circuit is configured: to detect a driving current Iz flowing through the entire piezoelectric vibrator; to detect a damping current Iy flowing through the damping capacitor Co; to calculate a series resonance current Ix flowing through the LC series resonance circuit by subtracting the detected damping current Iy from the detected driving current Iz; and to perform a phase adjustment so that a phase difference between the calculated series resonance current Ix and a driving voltage Ve to be applied to the piezoelectric vibrator becomes approximately 0.
摘要翻译： 一个实施例提供了一种用于驱动压电振动器的压电振动器驱动电路，该压电振子具有串联连接的LC串联谐振电路，等效电阻器Rx和与它们并联连接的阻尼电容器Co的等效电路， 驱动电路被配置为检测流过整个压电振动器的驱动电流Iz; 以检测流过阻尼电容器Co的阻尼电流Iy; 通过从检测到的驱动电流Iz减去检测到的阻尼电流Iy来计算流过LC串联谐振电路的串联谐振电流Ix; 并且进行相位调整，使得计算出的串联谐振电流Ix与施加到压电振动器的驱动电压Ve之间的相位差变为约0。
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