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    • 2. 发明授权
    • Electrical over stress robustness
    • 电应力鲁棒性强
    • US07573691B2
    • 2009-08-11
    • US10821836
    • 2004-04-12
    • Sandeep PantGary H. WeissDavid W. ThompsonYehuda Smooha
    • Sandeep PantGary H. WeissDavid W. ThompsonYehuda Smooha
    • H02H3/22
    • H01L27/0285
    • Protection is provided against electrical surges resulting from Electrical Over Stress conditions, e.g., when interfacing circuits with powered connections. An EOS shunt is activated for as long as the EOS condition exists. EOS protection using an EOS shunt in accordance with the principles of the present invention remains activated by a voltage threshold trigger as long as necessary. In a disclosed embodiment, an EOS shunt includes a voltage threshold detector that detects a voltage on a power bus with respect to a ground rail exceeding a predetermined amount, e.g., 5 volts in a device powered at 3.3 volts. During the EOS event, a path between power and ground comprising a transistor is turned on.
    • 提供了防止由电过压条件引起的电涌,例如当与电源连接相连的电路时。 只要EOS条件存在,EOS分流器就被激活。 根据本发明的原理使用EOS分流器的EOS保护由需要的电压阈值触发保持激活。 在公开的实施例中,EOS分流器包括电压阈值检测器,该电压阈值检测器相对于超过预定量的接地轨,例如在以3.3V供电的设备中检测5伏特的电力总线上的电压。 在EOS事件期间,包括晶体管的电源和地之间的路径导通。