Patent ID: 7642672

Claim:
An integrated circuit, comprising: first and second power rails; a first voltage regulator coupled to electrically bias the first power rail with respect to the second power rail; a plurality of circuit modules, each coupled between the first and second power rails to draw power therefrom; a plurality of voltage meters, each coupled to measure a voltage level received from the first power rail by a respective one of the circuit modules, wherein a voltage output of the first voltage regulator applied to the first power rail is controlled based on the voltage levels measured by the voltage meters so that each of circuit modules receives a respective desired voltage level from the first power rail; and at least a second voltage regulator coupled to electrically bias the first power rail with respect to the second power rail, wherein a voltage output of the second voltage regulator applied to the first power rail is controlled based on the voltage levels measured by the voltage meters so that each of the circuit modules receives the respective desired voltage level from the first power rail.