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    • 1. 发明申请
    • ELECTRONIC DEVICE AND CIRCUIT FOR PROVIDING TACTILE FEEDBACK
    • 用于提供触觉反馈的电子设备和电路
    • WO2009039068A2
    • 2009-03-26
    • PCT/US2008076474
    • 2008-09-16
    • MOTOROLA INCSADLER DANIEL JCRANFILL DAVID BOLLEY MICHAEL FTASHAKKOR ERIC VWAGNER DANIEL H
    • SADLER DANIEL JCRANFILL DAVID BOLLEY MICHAEL FTASHAKKOR ERIC VWAGNER DANIEL H
    • H01L41/09H04B1/38
    • G06F1/3203G06F3/016H01L41/042H03K2217/96062
    • A circuit (800) for controlling at least one piezoelectric actuator (142) includes a piezoelectric drive circuit (802) that generates unidirectional voltage drive signal, also referred to as Vout, at node (804). The piezoelectric actuator drive circuit (802) includes a boost switcher circuit or charging circuit (806), a buck switcher circuit or pulsed current sink discharge circuit (808) and a control signal generating circuit (810) that receives an input control signal (812) from, for example, a keyboard processor or other suitable processor (604) indicating that the device has requested generation of haptic feedback utilizing the piezoelectric actuator (142). The control signal generating circuit (810) provides at least two pulse-with-modulated control signals, one to control the charging circuit and one to control the discharging circuit to produce the unidirectional voltage drive signal, that in one example is a raised cosine drive signal (904).
    • 用于控制至少一个压电致动器(142)的电路(800)包括在节点(804)处产生单向电压驱动信号(也称为Vout)的压电驱动电路(802)。 压电致动器驱动电路(802)包括升压开关电路或充电电路(806),降压开关电路或脉冲电流吸收放电电路(808)和接收输入控制信号(812)的控制信号发生电路(810) )从例如键盘处理器或其他合适的处理器(604)指示设备已经请求使用压电致动器产生触觉反馈(142)。 控制信号发生电路(810)提供至少两个脉冲调制控制信号,一个用于控制充电电路,一个用于控制放电电路以产生单向电压驱动信号,在一个示例中为升余弦驱动 信号(904)。