公开(公告)号：EP0911954B1

公开(公告)日：2001-05-02

申请号：EP97830533.2

申请日：1997-10-23

Applicant: STMicroelectronics S.r.l.

Inventor： Salina, Alberto ,  Brambilla, Donatella

IPC: H02P7/00

CPC classification number: H02P25/034 ,  H02P7/04

公开(公告)号：EP0911954A1

公开(公告)日：1999-04-28

申请号：EP97830533.2

申请日：1997-10-23

Applicant: STMicroelectronics S.r.l.

Inventor： Salina, Alberto ,  Brambilla, Donatella

IPC: H02P7/00

CPC classification number: H02P25/034 ,  H02P7/04

Abstract: In a current mode, PWM integrated drive system of an external load (VCM) a switched-capacitor amplifier with a Sample & Hold stage connected in cascade thereto as the current sensing amplifier of the control loop, overcomes the criticality of inevitable resistive mismatchings, thus permitting a scaling down of the integrated drive system while preserving a high precision.

Abstract translation: 在当前模式中，外部负载（VCM）的PWM集成驱动系统具有与其级联连接的采样和保持级的开关电容放大器作为控制回路的电流感测放大器，克服了不可避免的电阻失配的关键性，因此 允许集成驱动系统缩小，同时保持高精度。