发明名称 |
Methods and apparatus for monitoring power gating circuitry and for controlling circuit operations in dependence on monitored power gating conditions |
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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申请公布号 |
US7679402(B2) |
申请公布日期 |
2010.03.16 |
申请号 |
US20080062102 |
申请日期 |
2008.04.03 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
BUTTS J. ADAM;DITLOW GARY S.;KOSONOCKY STEPHEN V.;MONWAI BRIAN C. |
分类号 |
H03K19/0175 |
主分类号 |
H03K19/0175 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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