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Methods and Apparatus for Monitoring Power Gating Circuitry and for Controlling Circuit Operations in Dependence on Monitored Power Gating Conditions
Methods and Apparatus for Monitoring Power Gating Circuitry and for Controlling Circuit Operations in Dependence on Monitored Power Gating Conditions
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机译:取决于所监视的功率门控条件来监视功率门控电路和控制电路操作的方法和装置
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摘要
A circuit incorporating a current starved ring oscillator is coupled to a power gate switch in an integrated circuit. The circuit incorporating the current starved ring oscillator amplifies a voltage difference between a virtual ground associated with the power gate switch and ground, and converts the difference to a frequency. Digital logic monitors the output of the ring oscillator using a counter and a reference clock. Control circuitry controls operation of the integrated circuit in dependence on the monitored conditions associated with the power gate switch. A method monitors a virtual ground voltage across a power gate switch in an integrated circuit; and controls operation of the integrated circuit in dependence on the monitored virtual ground voltage.
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