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    • 21. 发明申请
    • DETECTION APPARATUS, DETECTION METHOD, AND ELECTRONIC APPARATUS
    • 检测装置,检测方法和电子装置
    • US20080282800A1
    • 2008-11-20
    • US12117564
    • 2008-05-08
    • Kazuo Kurihara
    • Kazuo Kurihara
    • G01C19/00
    • G01C19/5649
    • A detection apparatus is provided which includes a cantilever vibration gyro including a piezoelectric element having a first side provided with a drive electrode and a pair of detection electrodes sandwiching the drive electrode with predetermined gaps therebetween and a second side opposed to the first side and provided with a common electrode, which vibrates by a drive signal input between the drive electrode and the common electrode and generates a pair of detected signals corresponding to Coriolis force from the detection electrodes. The detection apparatus also includes a bias applying section for applying a bias voltage to the detection electrodes, an adding section adding the pair of detected signals, a first phase delay section delaying a phase of the detected signal obtained by the addition by a range larger than 45° and smaller than 90°, and an amplitude control section controlling the delayed detected signal to a predetermined voltage amplitude to output as the drive signal.
    • 提供了一种检测装置,其包括悬臂振动陀螺仪,该悬臂振动陀螺仪包括具有设置有驱动电极的第一侧的压电元件和夹着驱动电极的一对检测电极,其间具有预定的间隙,以及与第一侧相对的第二侧, 公共电极通过在驱动电极和公共电极之间输入的驱动信号而振动,并产生对应于来自检测电极的科里奥利力的一对检测信号。 检测装置还包括:偏置施加部,用于向检测电极施加偏置电压;加法部,将检测出的一对信号相加;第一相位延迟部,将通过相加得到的检测信号的相位延迟大于 45°且小于90°,​​以及幅度控制部分,将延迟的检测信号控制到预定电压幅值,作为驱动信号输出。
    • 22. 发明申请
    • Vibration Gyro Circuitry, Vibration Gyro Unit, and Method for Detecting Vibration Gyro Output
    • 振动陀螺仪电路,振动陀螺仪,以及检测振动陀螺仪输出的方法
    • US20080276708A1
    • 2008-11-13
    • US10596252
    • 2005-09-28
    • Kazuo Kurihara
    • Kazuo Kurihara
    • G01C19/56
    • G01C25/005G01C19/5649
    • Vibration gyro circuitry, a vibration gyro unit, and a method for detecting a vibration gyro output, which enable detection of a rotational angular velocity with high sensitivity, are provided. The circuitry and the unit includes a differential amplifier circuit (4) for outputting a signal Vda corresponding to a difference (Vgl−Vgr) between output signals of two detection pieces of a vibration gyro (31), a synchronous detection circuit (5) for synchronously detecting the output signal Vda of the differential amplifier circuit (4), and a phase shift circuit for supplying to the synchronous detection circuit (5) a signal, as a timing signal Vck for the synchronous detection, which is phase-shifted with respect to a drive signal (an output signal of an adding circuit 1) Vsa supplied to the vibration gyro (31). The phase difference θps between the drive signal Vsa and the timing signal Vck is set on the basis of a phase difference characteristic of a detection sensitivity S for the output signal Vda of the differential amplifier circuit (4), which is obtained in advance under a condition where a rotational angular velocity is applied to the vibration gyro (31) in a driving state.
    • 提供振动陀螺仪电路,振动陀螺仪单元和用于检测振动陀螺仪输出的方法,其能够以高灵敏度检测旋转角速度。 电路和单元包括差分放大器电路(4),用于输出对应于振动陀螺仪(31)的两个检测件的输出信号之间的差值(Vgl-Vgr)的信号Vda,用于 同步检测差分放大电路(4)的输出信号Vda;以及相移电路,用于向同步检测电路(5)提供作为用于同步检测的定时信号Vck的信号,该定时信号Vck相对于 提供给振动陀螺仪(31)的驱动信号(加法电路1的输出信号)Vsa。 基于对于差分放大电路(4)的输出信号Vda的检测灵敏度S的相位差特性设定驱动信号Vsa与定时信号Vck之间的相位差, 在驱动状态下将旋转角速度施加到振动陀螺仪(31)的状态。
    • 23. 发明申请
    • VIBRATION GYRO SENSOR, CONTROL CIRCUIT, AND ELECTRONIC APPARATUS
    • 振动陀螺传感器,控制电路和电子设备
    • US20080163684A1
    • 2008-07-10
    • US11970027
    • 2008-01-07
    • Kazuo Kurihara
    • Kazuo Kurihara
    • G01C19/00
    • G01C19/5649
    • Provided is a vibration gyro sensor including: a vibration element including a piezoelectric element group which has a first side provided with a drive electrode and a detection electrode and a second side opposed to the first side and provided with a common electrode, which vibrates by a drive signal input between the drive electrode and the common electrode and generates an output signal containing a detection signal corresponding to Coriolis force from the detection electrode; a bias section applying a bias voltage to the detection electrode; an oscillation circuit outputting the signal for causing vibration of the vibration element to the drive electrode as the drive signal based on the output signal generated by the detection electrode; and a phase inversion circuit outputting an inversion signal obtained by inverting a phase of the drive signal output from the oscillation circuit to the common electrode.
    • 提供一种振动陀螺仪传感器,包括:振动元件,包括压电元件组,其具有设置有驱动电极和检测电极的第一侧和与第一侧相对的第二侧,并且设置有公共电极,该公共电极通过 驱动信号输入到所述驱动电极和所述公共电极之间,并且产生包含来自所述检测电极的与科里奥利力相对应的检测信号的输出信号; 向所述检测电极施加偏压的偏压部; 振荡电路,根据检测电极产生的输出信号,输出振动元件对驱动电极振动的信号作为驱动信号; 输出通过将从振荡电路输出的驱动信号的相位反相到公共电极而获得的反相信号的相位反转电路。
    • 25. 发明授权
    • Reproducing circuit for a magnetic head incorporating the
voltage-to-current and an exponent current amplifier
    • 用于包含电压 - 电流和指数电流放大器的磁头的再现电路
    • US5940235A
    • 1999-08-17
    • US264473
    • 1994-06-23
    • Yasuo SasakiMunekatsu FukuyamaKazuo Kurihara
    • Yasuo SasakiMunekatsu FukuyamaKazuo Kurihara
    • G11B5/00G11B5/02G11B5/09G11B15/12G11B19/02H03F3/72
    • G11B15/125G11B19/02G11B5/02G11B5/09H03F3/72G11B2005/0016G11B2005/0018
    • A recording/reproducing apparatus for a magneto-resistive (MR) head having a playback amplifier, including a capacitor for a dc feedback low-pass filter for dc feedback to an initial-stage transistor, and a differential amplifier (gm amplifier), and a switching device for the gm amplifier and for the initial-stage amplifier operable at the time of recording/playback switching. The timing of the switching device is deviated for shortening the switching time interval. To this end, an output of the initial-stage transistor of a playback amplifier for a MR head is compared to reference voltage Vref by a gm amplifier and the low-pass filter is constituted by transconductance gm of the gm amplifier and the capacitance of the capacitor, with the dc output of the gm amplifier being fed back to the base of the initial-stage amplifier. The delay in switching time by the charging of the capacitor caused by the difference in the rise time of the initial-stage transistor and the gm amplifier is deviated by the control signal from a control circuit to control the initial-stage transistor and the gm amplifier.
    • 一种用于具有回放放大器的磁阻(MR)头的记录/再现装置,包括用于直流反馈低通滤波器的电容器用于直流反馈到初始级晶体管,以及差分放大器(gm放大器),以及 用于gm放大器和用于在记录/重放切换时可操作的初级放大器的开关装置。 切换装置的定时偏离以缩短切换时间间隔。 为此,将用于MR磁头的重放放大器的初级晶体管的输出与gm放大器与参考电压Vref进行比较,低通滤波器由gm放大器的跨导gm和 电容器,gm放大器的直流输出反馈到初级放大器的基极。 由初始级晶体管和gm放大器的上升时间差引起的对电容器的充电的开关时间的延迟由控制电路的控制信号偏离,以控制初级晶体管和gm放大器 。