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    • 8. 发明授权
    • Methods and apparatuses for performing common mode pulse compensation in an opto-isolator
    • 用于在光隔离器中执行共模脉冲补偿的方法和装置
    • US08116055B2
    • 2012-02-14
    • US12719036
    • 2010-03-08
    • Richard A. BaumgartnerKwee Chong Chang
    • Richard A. BaumgartnerKwee Chong Chang
    • H02H9/08
    • H04B10/299H04B10/802
    • In an opto-isolator, a common mode pulse compensation circuit is provided that senses when a common mode pulse event occurs and that adds current to the LED drive current to compensate for a decrease in the LED drive current caused by the occurrence of the event. The common mode pulse compensation circuit is capable of operating effectively over a very wide range of common mode pulse slopes by automatically adjusting the amount of current that is added to the LED drive current based at least in part on the slope of the sensed common mode pulse. In addition, the common mode pulse compensation circuit is capable of being implemented with LEDs that operate at very low drive currents, which allows the power consumption requirements of the opto-isolator to be reduced.
    • 在光隔离器中,提供共模脉冲补偿电路,其检测何时发生共模脉冲事件,并且向LED驱动电流增加电流以补偿由于事件发生引起的LED驱动电流的减小。 共模脉冲补偿电路能够在非常宽的共模脉冲斜率范围内有效地工作,这通过至少部分地基于感测的共模脉冲的斜率自动调节添加到LED驱动电流的电流量 。 此外,共模脉冲补偿电路能够用在非常低的驱动电流下操作的LED来实现,这允许减少光隔离器的功耗要求。