公开(公告)号：US10013859B2

公开(公告)日：2018-07-03

申请号：US15638975

申请日：2017-06-30

Applicant: Texas Instruments Incorporated

Inventor： Mandy Barsilai ,  David Hernandez ,  Mark Stephen Toth

IPC: G08B6/00 ,  G06F3/01

CPC classification number: G08B6/00 ,  G06F3/016

Abstract: Disclosed examples include methods and circuits to drive a haptic actuator, in which a single input signal from a host device has a first state representing a command to drive the actuator and a second state representing a command to stop the actuator. A control circuit provides a drive control signal to a driver circuit to drive the haptic actuator in response to the control signal transitioning to the first state, and to stop the haptic actuator in response to the control signal transitioning to the second state. A timer circuit places the circuit in a low power mode a predetermined time after the control signal transitions to the second state, or the control circuit places the circuit in the low power mode in response to a feedback signal indicating that the actuator has reached a stopped condition.

公开(公告)号：US20160155305A1

公开(公告)日：2016-06-02

申请号：US14955553

申请日：2015-12-01

Applicant: Texas Instruments Incorporated

Inventor： Mandy Barsilai ,  David Hernandez ,  Mark Stephen Toth

IPC: G08B6/00 ,  G06F3/01

CPC classification number: G08B6/00 ,  G06F3/016

Abstract: Disclosed examples include methods and circuits to drive a haptic actuator, in which a single input signal from a host device has a first state representing a command to drive the actuator and a second state representing a command to stop the actuator. A control circuit provides a drive control signal to a driver circuit to drive the haptic actuator in response to the control signal transitioning to the first state, and to stop the haptic actuator in response to the control signal transitioning to the second state. A timer circuit places the circuit in a low power mode a predetermined time after the control signal transitions to the second state, or the control circuit places the circuit in the low power mode in response to a feedback signal indicating that the actuator has reached a stopped condition.

Abstract translation: 公开的示例包括用于驱动触觉致动器的方法和电路，其中来自主机设备的单个输入信号具有表示驱动致动器的命令的第一状态和表示停止致动器的命令的第二状态。 控制电路向驱动电路提供驱动控制信号，以响应于控制信号转变到第一状态来驱动触觉致动器，并且响应于控制信号转变到第二状态来停止触觉致动器。 定时器电路在控制信号转变到第二状态之后的预定时间内将电路置于低功率模式，或者控制电路响应于指示致动器已经达到停止的反馈信号而将电路置于低功率模式 条件。

公开(公告)号：US20140320045A1

公开(公告)日：2014-10-30

申请号：US13871191

申请日：2013-04-26

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： David Hernandez ,  Mayank Garg ,  David J. Baldwin ,  Brandon James Beckham

IPC: H02P25/02

CPC classification number: H02P25/032 ,  H02P6/182

Abstract: Circuits and methods for driving ERM motors are disclosed herein. An embodiment of the circuit includes an input, wherein an input signal is receivable at the input and a back EMF signal. The circuit operates in a closed loop mode when the back EMF signal is less than a lower threshold value and the difference between the value of the input signal and the back EMF signal indicates that the velocity of the motor needs to increase. The circuit operates in an open loop mode when the back EMF signal is greater than a high threshold value and the difference between the value of the input signal and the back EMF signal indicates that the velocity of the motor needs to increase.

Abstract translation: 本文公开了用于驱动ERM电动机的电路和方法。 电路的实施例包括输入，其中输入信号可在输入端接收，反馈EMF信号。 当反电动势信号小于下限阈值时，电路工作在闭环模式，而输入信号与反电动势信号之间的差值表明电动机的速度需要增加。 当反电动势信号大于高阈值时，电路工作在开环模式，输入信号和反电动势信号之间的差值表示电动机的速度需要增加。