发明授权
US08044619B2 Prevention of concurrent PWM or PSM commutations of power signals driving a voice coil motor (VCM) to reduce S/N ratio degradation of low level signal lines of a R/W head
有权
防止驱动音圈电机（VCM）的电源信号同时进行PWM或PSM换向，以降低R / W磁头低电平信号线的S / N比降低
- 专利标题： Prevention of concurrent PWM or PSM commutations of power signals driving a voice coil motor (VCM) to reduce S/N ratio degradation of low level signal lines of a R/W head
- 专利标题（中）： 防止驱动音圈电机（VCM）的电源信号同时进行PWM或PSM换向，以降低R / W磁头低电平信号线的S / N比降低
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申请号： US11760185申请日： 2007-06-08
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公开(公告)号： US08044619B2公开(公告)日： 2011-10-25
- 发明人: Giuseppe Maiocchi , Ezio Galbiati , Michele Boscolo Berto
- 申请人： Giuseppe Maiocchi , Ezio Galbiati , Michele Boscolo Berto
- 申请人地址： IT Agrate Brianza (MI)
- 专利权人： STMicroelectronics S.R.L.
- 当前专利权人： STMicroelectronics S.R.L.
- 当前专利权人地址： IT Agrate Brianza (MI)
- 代理机构： Allen, Dyer, Doppelt, Milbrath & Gilchrist, P.A.
- 代理商 Lisa K. Jorgenson
- 优先权： EP06425391 20060609
- 主分类号： H02K5/00
- IPC分类号： H02K5/00
摘要：
A method of preventing concurrent or quasi-concurrent commutations of a pair of phase shift modulation (PSM) drive signals of an output bridge stage driving an electrical load includes establishing a threshold level of a programmed current level to be transmitted though the electrical load. The method also includes, if the programmed current level is lower than the threshold level, enhancing a time offset between commutation edges of the pair of PSM drive signals by a minimum time.
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