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    • 6. 发明授权
    • HGA rotational micro-actuator including an s-shaped frame and method of making thereof
    • HGA旋转微致动器,其包括s形框架及其制造方法
    • US07643253B2
    • 2010-01-05
    • US11536558
    • 2006-09-28
    • Minggao YaoYiru XieWei Ma
    • Minggao YaoYiru XieWei Ma
    • G11B5/56
    • G11B5/5552
    • A rotational micro-actuator (20) used in hard disk driver is disclosed. It comprises a frame (21) approximately in the shape of letter “S” and PZT pieces (28, 29) attached to said frame (21), wherein said frame (21) is formed with a central coupling portion (213) by which the micro-actuator (20) is coupled to a suspension tongue (177), and two pieces of said PZT (28, 29) are arranged in central symmetry manner about said central coupling portion (213) such that said micro-actuator (20) can rotate about said central coupling portion (213) in response to the driving signals applied to said PZT pieces (28, 29), thus cause the displacement of the head element secured to the micro-actuator (20) so as to achieve the fine positioning of the head element. With above configuration, the micro-actuator of this invention will not cause the resonance of the suspension base plate during operation. Thereby the servo bandwidth of the hard disk driver is expanded.
    • 公开了一种用于硬盘驱动器的旋转微致动器(20)。 它包括大致为字母“S”的框架(21)和附着到所述框架(21)上的PZT片(28,29),其中所述框架(21)形成有中心联接部分(213) 微致动器(20)联接到悬挂舌(177),并且两个所述PZT(28,29)围绕所述中心联接部分(213)以中心对称的方式布置,使得所述微致动器(20) )可以响应于施加到所述PZT片(28,29)的驱动信号而围绕所述中心联接部分(213)旋转,从而导致固定到微致动器(20)的头元件的位移,以便实现 头元素的精细定位。 通过上述结构,本发明的微型致动器在操作中不会引起悬架基板的共振。 从而扩大了硬盘驱动器的伺服带宽。
    • 10. 发明申请
    • GEOMAGNETIC SENSOR DEVICE AND DIGITAL COMPASS WITH THE SAME
    • 地磁传感器装置和数字指示器
    • US20120186091A1
    • 2012-07-26
    • US13064574
    • 2011-03-31
    • Minggao YaoYamanoi Koyu
    • Minggao YaoYamanoi Koyu
    • G01C17/02G01R33/02
    • G01C17/30
    • A geomagnetic sensor device comprises a first geomagnetic sensor comprising a first Wheatstone bridge circuit and a second Wheatstone bridge circuit which are arranged in the same horizontal coordinate system, and a second geomagnetic sensor comprising a third Wheatstone bridge circuit and a fourth Wheatstone bridge circuit which are arranged in the same vertical coordinate system. Each of the Wheatstone bridge circuits comprises at least four magnetoresistive elements connecting and having power input terminals and signal output terminals. The present invention can obtains a stable and high output signal and achieves high measurement accuracy for the geomagnetic azimuth angle. The present invention also discloses a digital compass.
    • 地磁传感器装置包括第一地磁传感器,该第一地磁传感器包括布置在同一水平坐标系中的第一惠斯登电桥电路和第二惠斯登电桥电路,以及包括第三惠斯通电桥电路和第四惠斯通电桥电路的第二地磁传感器, 排列在同一垂直坐标系中。 惠斯登电桥电路中的每一个包括连接并具有电源输入端子和信号输出端子的至少四个磁阻元件。 本发明可以获得稳定的高输出信号,并且对于地磁方位角获得高的测量精度。 本发明还公开了一种数字罗盘。