公开(公告)号：EP1241670A1

公开(公告)日：2002-09-18

申请号：EP01830176.2

申请日：2001-03-15

Applicant: STMicroelectronics S.r.l.

Inventor： Schillaci, Luca ,  Nessi, Maurizio ,  Galbiati, Ezio

IPC: G11B21/08 ,  G11B5/55

CPC classification number: G11B5/5547 ,  G11B21/083

Abstract: A circuit for estimating the speed of an electromagnetic actuator (VCM) associated with a reading head of a disc storage unit with a digital controller (15) comprises a resistor (Rs) in series with the actuator and an adder (30) with inputs connected to the supply terminals (P, M) of the actuator and to the measuring resistor (Rs) via means for transferring to the adder, in predetermined proportions and with predetermined sign, the supply voltage and the voltage across the measuring resistor (Rs). The transfer means comprising calibration means controlled by the controller (15) in order to determine the predetermined voltage proportions in a manner such that the output voltage of the circuit is substantially proportional to the back electromotive force generated by the actuator in motion. In order to achieve precision and versatility without occupying much integrated-circuit area, the calibration means comprise an adjustable-gain amplifier (34) and means for determining the gain of the amplifier, comprising coarse setting means (Vref2, 41, 42) and fine calibration means controlled by the controller.

Abstract translation: 用于利用数字控制器（15）估计与盘存储单元的读取头相关联的电磁致动器（VCM）的速度的电路包括与致动器串联的电阻器（Rs）和与输入相连的加法器（30） 通过用于以预定比例和预定的符号将测量电阻器（Rs）两端的电源电压和电压传送到加法器的装置，经由致动器的供电端子（P，M）和测量电阻器（Rs）。 传送装置包括由控制器（15）控制的校准装置，以便以使得电路的输出电压基本上与由致动器运动产生的反电动势成比例的方式确定预定的电压比例。 为了在不占用大量集成电路面积的情况下实现精确度和通用性，校准装置包括可调增益放大器（34）和用于确定放大器增益的装置，包括粗设置装置（Vref2,41,42）和精细 校准装置由控制器控制。

公开(公告)号：EP1241670B1

公开(公告)日：2006-06-21

申请号：EP01830176.2

申请日：2001-03-15

Applicant: STMicroelectronics S.r.l.

Inventor： Schillaci, Luca ,  Nessi, Maurizio ,  Galbiati, Ezio

IPC: G11B21/08 ,  G11B5/55

CPC classification number: G11B5/5547 ,  G11B21/083

公开(公告)号：EP1641116A1

公开(公告)日：2006-03-29

申请号：EP04425719.4

申请日：2004-09-27

Applicant: STMicroelectronics S.r.l.

Inventor： Schillaci, Luca

IPC: H02P7/00

CPC classification number: H02P25/034

Abstract: The present invention relates to a reduced hardware control circuit device with current loop for broad band Hard Disk Drive applications, of the type comprising a current loop for detecting the value of the current (I) flowing on the coils of a voice coil electric motor (M) incorporated in said Hard Disk Drive and including a sensing resistance (Rs), connected in series to the motor and at least a driving driver for a relative motor coil. Advantageously the current loop is a transconductance loop with a transconductance amplifier (Gm1) associated with the sensing resistance (Rs) and with a second transconductance amplifier (Gm2) for fixing the current value (I) to be applied to the motor(M).
The device according to the invention is deprived of a local compensation in correspondence with the first transconductance amplifier (Gm1).

Abstract translation: 本发明涉及一种具有用于宽带硬盘驱动器应用的电流回路的降低的硬件控制电路装置，其类型包括用于检测流过音圈电动机的线圈上的电流（I）的值的电流回路， M），并且包括与电动机串联连接的感测电阻（Rs）和用于相对电动机线圈的至少一个驱动驱动器。 有利地，电流回路是具有与感测电阻（Rs）相关联的跨导放大器（Gm1）和用于固定要施加到电动机（M）的电流值（I）的第二跨导放大器（Gm2）的跨导环路。 根据本发明的器件与第一跨导放大器（Gm1）相对应地被剥夺了局部补偿。

公开(公告)号：EP1207618B1

公开(公告)日：2005-10-05

申请号：EP00830764.7

申请日：2000-11-20

Applicant: STMicroelectronics S.r.l.

Inventor： Galbiati, Ezio ,  Nessi, Maurizio ,  Schillaci, Luca

IPC: H02P7/00

CPC classification number: H02P25/034

公开(公告)号：EP1207618A1

公开(公告)日：2002-05-22

申请号：EP00830764.7

申请日：2000-11-20

Applicant: STMicroelectronics S.r.l.

Inventor： Galbiati, Ezio ,  Nessi, Maurizio ,  Schillaci, Luca

IPC: H02P7/00

CPC classification number: H02P25/034

Abstract: The present invention concerns a circuit for the speed recovery of a direct current motor comprising an output stage (1), consisting of a first couple of transistors (MOS1, MOS2) and of a second couple of transistors (MOS3, MOS4), and first means (5) for detecting a current circulating (Ivcm) in said motor. The inventive circuit has the characteristic of. comprising second means (7) suitable for activating said second couple of transistors (MOS3, MOS4) of said output stage (1) for a determined first time period (Tbrk) so as to short-circuit said motor (2), and at the end of said first time period (Tbrk) said second means (7) being suitable for unbalancing said output stage (1) so as to force the maximum current circulating (Ivcm) for a determined second time period (Tact) in function of the value detected by said first means (5) during said first time period (Tbrk) so as to stop said motor (2) in the shortest time possible.

Abstract translation: 本发明涉及一种用于包括输出级（1）组成的第一对晶体管（MOS 1，MOS 2）中的直流电动机的速度恢复的电路和第二对晶体管（MOS3，MOS4），和第一 装置（5）用于检测电流在所述电动机中循环（IVCM）。 根据本发明的电路具有的特性。 包括第二装置（7）适于启动所述输出级的所述第二对晶体管（MOS3，MOS4）（1）对于一个确定的开采第一时间段（Tbrk），以便短路所述电动机（2），并在 所述第一时间段（Tbrk）的端部，所述第二装置（7）适于不平衡所述输出级（1），以便迫使最大电流值的功能循环（IVCM），用于确定性开采第二时间段（轻触） 在所述第一时段（Tbrk）的第一装置（5）由所述检测到的，以便停止所述电动机（2）在最短的时间内。