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1. 发明授权

US06463211B1 Calibration technique of a BEMF detector 有权
标题翻译： BEMF检测器的校准技术
公开(公告)号：US06463211B1
公开(公告)日：2002-10-08
申请号：US09693499
申请日：2000-10-20
申请人： Roberto Peritore , Alberto Salina , Andrea Merello , Lorenzo Papillo , Francesco Vavala , Gianluca Ventura
发明人： Roberto Peritore , Alberto Salina , Andrea Merello , Lorenzo Papillo , Francesco Vavala , Gianluca Ventura
IPC分类号： H02P500
CPC分类号： G11B5/5526
摘要： The present invention relates to the positioning of the read/write transducer heads of an hard disk (HD) in a designated landing zone when requested or when the electrical power is removed from the drive. In particularly it relates to the detection of the back electromotive force (BEMF) of the motor involved in the positioning of the read/write transducer heads. According to an embodiment of the present invention a BEMF detection circuit for a voice-coil motor operative to continually generate a signal proportionally to the velocity of said voice-coil motor comprises a algebraic summing node producing at its output the BEMF of the voice-coil motor and receiving: a first voltage proportional to the voltage across the voice-coil motor; a second voltage representing the product of a first multiplier factor and a voltage proportional to the current in the coil; a third voltage representing the product of a prefixed bias voltage Vref and a second multiplier factor; said third voltage is calibrated by a single calibration circuitry operative to calibrate said second multiplier factor in response to a calibration control signal, in order to cancel said second voltage.
摘要翻译：本发明涉及当请求时或当从驱动器移除电力时将硬盘（HD）的读/写换能器头定位在指定的着陆区中。特别地，其涉及在读/写换能器头的定位中涉及的电动机的反电动势（BEMF）的检测。根据本发明的实施例，用于音圈电机的BEMF检测电路可操作以连续地产生与所述音圈电动机的速度成比例的信号，包括代数求和节点，在其输出端产生音圈的BEMF 电机和接收：与音圈电机两端的电压成比例的第一电压; 代表第一乘数和与线圈中的电流成正比的电压的乘积的第二电压; 代表预置偏置电压Vref和第二乘数的乘积的第三电压; 所述第三电压由单个校准电路校准，所述单个校准电路用于响应于校准控制信号校准所述第二乘法器因数，以便消除所述第二电压。

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