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    • 9. 发明授权
    • Power supply switching at circuit block level to reduce integrated circuit input leakage currents
    • 电源切换电路块级降低集成电路输入漏电流
    • US07498845B1
    • 2009-03-03
    • US11880648
    • 2007-07-23
    • James T. Doyle
    • James T. Doyle
    • H03K19/096
    • H03K19/00346H03K19/0941
    • Leakage currents at IC inputs can be avoided while the IC is disabled by providing a switch that is responsive to deactivation of an enable input to isolate functional circuitry of the IC from one of the power supply nodes of the IC. This eliminates power supply current while the IC is disabled. Further unwanted current flow can be avoided while the IC is disabled by providing a switch that is responsive to the enable input for selectively connecting and disconnecting the base of a reference voltage transistor to and from the transistor's grounded collector, which collector is defined by the substrate of the IC. Disconnection of the base from the grounded substrate/collector eliminates base current and thus prevents emitter-to-collector current flow through the transistor when the IC is disabled.
    • 可以通过提供响应于使能输入的去激活而将IC与IC的电源节点之一隔离的开关来禁用IC来禁止IC输入端的泄漏电流。 这可以在IC禁用时消除电源电流。 通过提供响应于使能输入的开关来禁用IC,可以避免IC的不需要的电流流动,该开关用于选择性地将参考电压晶体管的基极连接到晶体管的接地集电极和从晶体管的接地集电极断开,该集电极由衬底 的IC。 基极与接地的基板/集电极的断开消除了基极电流,因此当IC被禁用时,防止发射极到集电极电流流过晶体管。