Patent ID: 7222248
Filing Date: 2007-05-22
Classification: G06F,Y02D

Abstract:
1. A method of controlling at least one voltage level across a distributed power grid within an integrated circuit having a set of independently switchable voltage islands comprising the steps of: providing a plurality of voltage sensors connected to different locations in said power grid; coupling to said plurality of voltage sensors a plurality of storage means adapted to store sequentially a set of N voltage values such that said plurality of storage means store N sequential grid voltage values from said plurality of voltage sensors; providing a controller for controlling said independently switchable voltage islands, said controller being coupled to each of said plurality of voltage sensors and to said plurality of storage means, said controller being adapted to respond to a request to switch a Kth voltage island by switching said Kth voltage island at a time such that a grid voltage level at a reference location is within a specified range.