公开(公告)号：US20150036238A1

公开(公告)日：2015-02-05

申请号：US13956484

申请日：2013-08-01

Applicant: STMicroelectronics Asia Pacific Pte. Ltd.

Inventor： Lorenzo Ferrario ,  Kaufik Linggajaya

IPC: G11B5/54

CPC classification number: G11B5/022

Abstract: The back EMF (BEMF) of a motor is sensed and compared to a target back EMF (BEMF) to generate an error control signal. The circuit supply voltage is also sensed. A PWM motor control signal is generated in response to a comparison of the error control signal to a ramp signal having a variable slope. The variable slope is selected in response to the sensed circuit supply voltage. The motor is then driven in response to the PWM control signal. The sign of the error control signal is used to selectively short one of motor terminals to a reference voltage supply node while the other motor terminal is driven in response to the PWM control signal.

Abstract translation: 电动机的反电动势（BEMF）被感测并与目标反电动势（BEMF）进行比较以产生误差控制信号。 还检测电路电源电压。 响应于误差控制信号与具有可变斜率的斜坡信号的比较，产生PWM电动机控制信号。 响应于检测到的电路电源电压选择可变斜率。 然后根据PWM控制信号驱动电机。 误差控制信号的符号用于选择性地将一个电动机端子短路到参考电压供应节点，同时响应于PWM控制信号驱动另一个电动机端子。

公开(公告)号：US08963589B1

公开(公告)日：2015-02-24

申请号：US14152270

申请日：2014-01-10

Applicant: STMicroelectronics S.r.I. ,  STMicroelectronics Asia Pacific Pte. Ltd.

Inventor： Lorenzo Ferrario ,  Roberto Trabattoni

IPC: H03K4/06 ,  H03K4/08

CPC classification number: H03K4/50

Abstract: An oscillator circuit selectively charges and discharges a capacitor with currents having variable magnitudes. A trimming circuit functions to measure a half period of the oscillator signal. The measured half period is compared to a reference period to generate an error signal. The variable magnitudes of one or the other or both of the current for sourcing or sinking at the capacitor are adjusted in response to the error signal.

Abstract translation: 振荡器电路选择性地对具有可变幅度的电流充电和放电电容器。 微调电路用于测量振荡器信号的一半周期。 将测量的半周期与参考周期进行比较以产生误差信号。 响应于误差信号来调整用于在电容器处供电或吸收的电流中的一个或另一个或两个的可变量。

公开(公告)号：US09236067B2

公开(公告)日：2016-01-12

申请号：US13956484

申请日：2013-08-01

Applicant: STMicroelectronics Asia Pacific Pte. Ltd.

Inventor： Lorenzo Ferrario ,  Kaufik Linggajaya

IPC: H02P6/18 ,  G11B5/02

CPC classification number: G11B5/022

Abstract: The back EMF (BEMF) of a motor is sensed and compared to a target back EMF (BEMF) to generate an error control signal. The circuit supply voltage is also sensed. A PWM motor control signal is generated in response to a comparison of the error control signal to a ramp signal having a variable slope. The variable slope is selected in response to the sensed circuit supply voltage. The motor is then driven in response to the PWM control signal. The sign of the error control signal is used to selectively short one of motor terminals to a reference voltage supply node while the other motor terminal is driven in response to the PWM control signal.

Abstract translation: 电动机的反电动势（BEMF）被感测并与目标反电动势（BEMF）进行比较以产生误差控制信号。 还检测电路电源电压。 响应于误差控制信号与具有可变斜率的斜坡信号的比较，产生PWM电动机控制信号。 响应于检测到的电路电源电压选择可变斜率。 然后根据PWM控制信号驱动电机。 误差控制信号的符号用于选择性地将一个电动机端子短路到参考电压供应节点，同时响应于PWM控制信号驱动另一个电动机端子。