Patent ID: 9337825
Filing Date: 2016-05-10
CPC Classification: H03K

Claim Text:
1. An integrated circuit comprising: a first power gated circuit block coupled to receive power from a first virtual voltage node, the first virtual voltage node being exclusive to the first power gated circuit block; a first plurality of power switches each coupled between the first virtual voltage node and a global voltage node that is non-exclusive to the first power gated circuit block; a power control unit, the power control unit including a voltage detection circuit configured to generate a first indication when a voltage on the first virtual voltage node is less than a predetermined threshold voltage, and a second indication when the voltage on the first virtual voltage node is greater than the predetermined threshold, wherein the power control unit is configured to cause the first plurality of power switches to be sequentially activated at a first rate responsive to the voltage detection unit generating the first indication and at a second rate responsive to the voltage detection unit generating the second indication.